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Delft University of Technology
1.
Machielsen, Martijn (author).
Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:20322a40-c256-4603-8ced-5dfec0aa9877 
► Permitted conflicts at (vehicle-actuated) signalised intersections are widely researched, though with the main focus on the traffic safety implications, because with permitted conflicts, two or…
(more)
▼ Permitted conflicts at (vehicle-actuated) signalised intersections are widely researched, though with the main focus on the traffic safety implications, because with permitted conflicts, two or more conflicting streams at a signalised intersection receive green at the same time, and thus meet at the conflict zone, as opposed to protected conflicts. The literature pays little attention to the traffic flow efficiency effects. Although some literature introduce some of these traffic flow efficiency effects, no detailed research has been done. This Additional Graduation Work contributes to this knowledge gap by introducing the potential traffic flow efficiency effects of permitted conflicts. In a simulation study, in which the gap acceptance behaviour of the simulation model Vissim is briefly tested, it is found that permitted conflicts (i) reduce the cycle time, (ii) reduce the queue length, and (iii) reduce the delay experienced by various road users at the signalised intersection. However, this comes at the cost of reduced saturation flow. Also, it is hypothesised that there is some turning point in terms of traffic flow volumes, and the distribution of volumes per approach at which the traffic flow efficiency effects become negative. This relates to the various traffic safety conditions that must be met at the signalised intersection with permitted conflicts as well, to ensure a safe conflict handling, which include that the traffic flow volumes may not be too large. Nonetheless, the traffic flow efficiency effects, in terms of intersection throughput and capacity, queues, and travel times and delays, of implementing permitted conflicts, as opposed to implementing protected conflicts on signalised intersections, are positive, in that sense that it resulted in shorter cycle times, less delay, and shorter queues on average. For signal groups with priority, the number of stops also decreased. Although there is a risk of oversaturation, the overall conclusion is that the traffic flow inefficiency effects are positive on average. In short, this comes down to that fewer protected conflicts, equals a higher traffic safety risk, but also a more efficient traffic flow, on average, hence the title of this research.
Civil Engineering | Transport and Planning
Advisors/Committee Members: Hegyi, Andreas (mentor), Salomons, Maria (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Traffic Signal Control; Traffic Flow Efficiency; Permitted Conflicts; Protected Conflicts
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APA (6th Edition):
Machielsen, M. (. (2019). Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts. (Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:20322a40-c256-4603-8ced-5dfec0aa9877
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Machielsen, Martijn (author). “Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts.” 2019. Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:20322a40-c256-4603-8ced-5dfec0aa9877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Machielsen, Martijn (author). “Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts.” 2019. Web. 07 Mar 2021.
Vancouver:
Machielsen M(. Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts. [Internet] [Thesis]. Delft University of Technology; 2019. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:20322a40-c256-4603-8ced-5dfec0aa9877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Machielsen M(. Less is More: Improved Traffic Flow Efficiency Effects at Vehicle-Actuated Signalised Intersections with Permitted Conflicts as opposed to Protected Conflicts. [Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:20322a40-c256-4603-8ced-5dfec0aa9877
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
2.
An, Qi (author).
Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:8f4571cc-f2ab-4eaa-b8e2-a3ef169d1d76
► Fixed-time control and vehicle-actuated control are two main signaling strategies implemented at intersections for urban traffic management. The timing and structure of the controllers are…
(more)
▼ Fixed-time control and vehicle-actuated control are two main signaling strategies implemented at intersections for urban traffic management. The timing and structure of the controllers are usually designed optimally based on average historical demand patterns at the intersection. Under the premise of performance quality assurance, both fixed-time and vehicle-actuated controllers can accommodate a certain degree of demand fluctuations. As a matter of fact, the demand change can be considerable over the years, which could exceed their capacities in adapting such degree of demand change, and thus the signal controllers should be regularly updated to fit the latest demand. To some extent, how much demand change can be adapted by both types of the signal controllers determines how frequent should the controllers be checked and improved. However, only qualitative comparison of the capabilities in demand adaptation between fixed-time and vehicle-actuated controllers are made in most of existing literatures, according to which vehicle-actuated controllers are expected to have higher capabilities in accommodating demand changes. In this research, a quantitative analysis and comparison were made for the fixed-time and vehicle-actuated controllers at a right-turning channelized intersection under various demand conditions. Since no useful studies could be found to predict the demand changes towards a specific intersection at current phase, the extra demand that could be accommodated by vehicle-actuated controllers were investigated instead. And it is found that the vehicle-actuated controllers can serve a 19% to 204% of more demand compared with the fixed-time controllers in scenarios defined in this research, according to which the redesign frequency can be further determined for both types of controllers to maintain comparable operation performance.
CIE5050-09
Advisors/Committee Members: Hegyi, Andreas (mentor), Salomons, Maria (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Traffic Signal Control; Fixed-time Control; Vehicle-actuated Control; Redesign Frequency; Isolated Intersection
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APA (6th Edition):
An, Q. (. (2020). Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection. (Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:8f4571cc-f2ab-4eaa-b8e2-a3ef169d1d76
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
An, Qi (author). “Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection.” 2020. Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:8f4571cc-f2ab-4eaa-b8e2-a3ef169d1d76.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
An, Qi (author). “Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection.” 2020. Web. 07 Mar 2021.
Vancouver:
An Q(. Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection. [Internet] [Thesis]. Delft University of Technology; 2020. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:8f4571cc-f2ab-4eaa-b8e2-a3ef169d1d76.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
An Q(. Redesign Frequency for Fixed-time and Vehicle-actuated Signal Controllers at A Right-turning Channelized Intersection. [Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:8f4571cc-f2ab-4eaa-b8e2-a3ef169d1d76
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
3.
van Gurp, Niels (author).
Signal Group-based Look-ahead Traffic Signal Control.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:da524b69-9a04-4c76-b333-1d5720c50daf
► Traffic signal controllers have been around since the late sixties of the 19th century and since then they have played an increasing role in (urban)…
(more)
▼ Traffic signal controllers have been around since the late sixties of the 19th century and since then they have played an increasing role in (urban) traffic management. Over the years many different algorithms have been developed and in Dutch practice actuated control is mostly used. Actuated control and other similar approaches apply variable green times to handle demand fluctuation, which leads to a reduction of the delay for vehicles in comparison to e.g. fixed-time control, however, in actuated control it is difficult to accurately predict control decisions. This study proposes a new traffic signal control algorithm that creates a planning of control decisions based on expected vehicle arrivals. By doing so, predictability of control decisions increases, while no sacrifices need to be made regarding the optimality of the control policy. Since certain errors such as inaccurate queue discharge rates are incorporated in the planning of control decisions, a second algorithm is required that adjusts the planning of control decisions to actual traffic conditions. Using an N65 case study intersection the performance of the new traffic signal control algorithm is compared to other algorithms. Depending on the availability of vehicle arrivals and the composition of traffic flows at the intersection, the new algorithm outperforms standard Dutch actuated traffic signal control in terms of overall delay by 3.1% to 4.7%. A range of improvement possibilities is suggested to ensure a greater reduction of the delay.
Civil Engineering
Advisors/Committee Members: Hegyi, Andreas (mentor), De Schutter, Bart (graduation committee), Salomons, Maria (graduation committee), Krol, Lieuwe (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Traffic Signal Control; Planning of Control Decisions; Look-ahead Control; Time-to-green; Time-to-red; Signal Group-based Approach; Dynamic Programming; Objective Balancement; Adaptability, Predictability, Priority
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APA ·
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APA (6th Edition):
van Gurp, N. (. (2019). Signal Group-based Look-ahead Traffic Signal Control. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:da524b69-9a04-4c76-b333-1d5720c50daf
Chicago Manual of Style (16th Edition):
van Gurp, Niels (author). “Signal Group-based Look-ahead Traffic Signal Control.” 2019. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:da524b69-9a04-4c76-b333-1d5720c50daf.
MLA Handbook (7th Edition):
van Gurp, Niels (author). “Signal Group-based Look-ahead Traffic Signal Control.” 2019. Web. 07 Mar 2021.
Vancouver:
van Gurp N(. Signal Group-based Look-ahead Traffic Signal Control. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:da524b69-9a04-4c76-b333-1d5720c50daf.
Council of Science Editors:
van Gurp N(. Signal Group-based Look-ahead Traffic Signal Control. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:da524b69-9a04-4c76-b333-1d5720c50daf
Delft University of Technology
4.
Verschelling, Rutger (author).
Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:19702baa-cf5e-472d-a7af-c531be04f7ae
► At large-scale events, the large inflow of visitors travelling by car often causes queues on the roads in the direct surroundings of the event. These…
(more)
▼ At large-scale events, the large inflow of visitors travelling by car often causes queues on the roads in the direct surroundings of the event. These queues can spill back to the main road network, where through traffic is driving as well: this through traffic will be hindered by the congestion, while those travellers don’t have the event venue as their destination. To prevent or at least reduce this unnecessary hindrance caused by car traffic at events, this Master thesis has researched control methodologies to optimise advice that is given to individual travellers using in-car systems. In individual traffic management (ITM), the event visitors will receive advice for their route and departure time choice. ITM can be used to optimise the decisions of the event visitors, to prevent queue spillback and other traffic issues at events. In this thesis, the design trade-offs for an ITM controller are identified: these trade-offs determine the actual design of an ITM controller aimed specifically at car traffic around large-scale events. Conceptually, the controller design is composed of a one-shot prediction model and mathematical optimisations of the individual route and departure time advice. These optimisations target a constrained system optimal traffic state in the network. Simulations of the designed controller show that ITM has potential to alleviate the congestion (and spillback) hindrance at large-scale events, by distributing event visitors over alternative routes and departure times. The benefits found in the simulations advocate the use of ITM at an event (or event-like conditions) in practice. Therefore, the application of the ITM controller design in practice is also discussed in this research. The discussion identifies the need to develop a (software) tool that is able to execute the controller’s actions in an offline or real-time manner. Furthermore, the possible barriers and opportunities for the implementation of ITM in the current and future traffic system are assessed.
Advisors/Committee Members: Hoogendoorn, Serge (mentor), Hegyi, Andreas (graduation committee), van Engelen, Matti (graduation committee), Koene, Tessa (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Traffic Management; Events; Controller; Optimisation; Simulation
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APA (6th Edition):
Verschelling, R. (. (2017). Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:19702baa-cf5e-472d-a7af-c531be04f7ae
Chicago Manual of Style (16th Edition):
Verschelling, Rutger (author). “Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors.” 2017. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:19702baa-cf5e-472d-a7af-c531be04f7ae.
MLA Handbook (7th Edition):
Verschelling, Rutger (author). “Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors.” 2017. Web. 07 Mar 2021.
Vancouver:
Verschelling R(. Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:19702baa-cf5e-472d-a7af-c531be04f7ae.
Council of Science Editors:
Verschelling R(. Traffic management at large-scale events: Design and evaluation of a controller providing route and departure time advice to individual visitors. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:19702baa-cf5e-472d-a7af-c531be04f7ae
Delft University of Technology
5.
Overvoorde, Rick (author).
COBRA: A cooperative breakdown prevention algorithm.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:b565395c-aa55-4db4-81dd-a6917fdaefb8
► Ever increasing traffic load on freeways calls for smart solutions to improve throughput. With the uprise and standardization of C-ITS, accuracy and latency of traffic…
(more)
▼ Ever increasing traffic load on freeways calls for smart solutions to improve throughput. With the uprise and standardization of C-ITS, accuracy and latency of traffic state measurements are immensely improved, while the span of control is increased. In this paper, a traffic control algorithm that aims to prevent breakdown at recurring bottlenecks on freeways is presented. By using C-ITS to control connected vehicles and manipulate the traffic state upstream of bottlenecks, a breakdown and capacity drop can be prevented. To evaluate the developed control concept, a microscopic simulation study was performed. The controller was evaluated on both reductions in penetration rate and compliance to control signals. The results are promising, but further development is still required before real-world application is possible.
Transport, Infrastructure and Logistics
Advisors/Committee Members: Hoogendoorn, Serge (mentor), Hegyi, Andreas (mentor), Happee, Riender (graduation committee), Chen, Yusen (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Dynamic traffic management; C-ITS; Vehicle-to-infrastructure; Microscopic traffic simulation
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APA (6th Edition):
Overvoorde, R. (. (2020). COBRA: A cooperative breakdown prevention algorithm. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b565395c-aa55-4db4-81dd-a6917fdaefb8
Chicago Manual of Style (16th Edition):
Overvoorde, Rick (author). “COBRA: A cooperative breakdown prevention algorithm.” 2020. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:b565395c-aa55-4db4-81dd-a6917fdaefb8.
MLA Handbook (7th Edition):
Overvoorde, Rick (author). “COBRA: A cooperative breakdown prevention algorithm.” 2020. Web. 07 Mar 2021.
Vancouver:
Overvoorde R(. COBRA: A cooperative breakdown prevention algorithm. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:b565395c-aa55-4db4-81dd-a6917fdaefb8.
Council of Science Editors:
Overvoorde R(. COBRA: A cooperative breakdown prevention algorithm. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:b565395c-aa55-4db4-81dd-a6917fdaefb8
Delft University of Technology
6.
Talsma, Tjalling (author).
Development of a Robust Reference Path Generator for Lateral Vehicle Control.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:e1482998-43c7-45a0-b09e-ad8668fbee96
► Automated vehicle control provides advantages in transport efficiency, redundancy, human-safety, flexibility, and parallelism. Extensive research has been dedicated to direct-following lateral control methods, using a…
(more)
▼ Automated vehicle control provides advantages in transport efficiency, redundancy, human-safety, flexibility, and parallelism. Extensive research has been dedicated to direct-following lateral control methods, using a single preview point as reference signal. However, these methods give rise to significant tracking errors. As alternative to a single point, a continuous path can be used as reference signal for vehicle control. Using a continuous reference path, accurate and comfortable control actions can be computed, while avoiding reference tracking errors. Therefore, robust reference path generation is an essential part of lateral vehicle control. The goal of this research is to develop a generic, robust reference path generator for lateral vehicle control. Currently in path generation, the state-of-the-art method is based on repetitive polynomial fitting. This method inherently contains two main weaknesses. Firstly, it is not robust to sensor noise and other real-world disturbances. Secondly, as a result of the repetitive fitting, a discontinuous path is generated. This is undesirable, because it leads to an unfeasible reference path, since vehicles can only produce and track continuous trajectories. Moreover, a discontinuous reference path results in the need for path smoothing when used in comfortable lateral vehicle control. Fundamentally, this smoothing leads to inaccurate control, caused by manipulation of the original, discontinuous reference path. To overcome these weaknesses, a new Model-based Path Generation method is presented. The development of a new, generic method for robust path generation is the main contribution of this research. This new path generation method is capable of producing feasible vehicle trajectories based on unfeasible waypoints. The performance of this method is evaluated in simulations and experiments, benchmarking it against polynomial fitting path generation. Furthermore, path generation robustness is assessed based on the outcome of a disturbance sensitivity analysis. The results are in accordance with the hypothesis stating that the new method outperforms the benchmark method in terms of path accuracy, robustness, continuity, and general applicability.
Advisors/Committee Members: Alirezaei, Mohsen (mentor), Hellendoorn, Hans (graduation committee), Teerhuis, A. (graduation committee), Hegyi, Andreas (graduation committee), Shyrokau, Barys (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: robust; path generation; vehicle control
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APA ·
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APA (6th Edition):
Talsma, T. (. (2018). Development of a Robust Reference Path Generator for Lateral Vehicle Control. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e1482998-43c7-45a0-b09e-ad8668fbee96
Chicago Manual of Style (16th Edition):
Talsma, Tjalling (author). “Development of a Robust Reference Path Generator for Lateral Vehicle Control.” 2018. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:e1482998-43c7-45a0-b09e-ad8668fbee96.
MLA Handbook (7th Edition):
Talsma, Tjalling (author). “Development of a Robust Reference Path Generator for Lateral Vehicle Control.” 2018. Web. 07 Mar 2021.
Vancouver:
Talsma T(. Development of a Robust Reference Path Generator for Lateral Vehicle Control. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:e1482998-43c7-45a0-b09e-ad8668fbee96.
Council of Science Editors:
Talsma T(. Development of a Robust Reference Path Generator for Lateral Vehicle Control. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:e1482998-43c7-45a0-b09e-ad8668fbee96
Delft University of Technology
7.
Hillebrink, Alwin (author).
Optimal traffic light control: performance evaluation applying a general evaluation methodology.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:a2b5a1e7-f726-4d13-99fa-789031aa51bd
► The ongoing increase in urbanization and traffic congestion creates an urgent need to operate our transportation systems with maximum efficiency. Traffic signal control optimization is…
(more)
▼ The ongoing increase in urbanization and traffic congestion creates an urgent need to operate our transportation systems with maximum efficiency. Traffic signal control optimization is considered one of the main ways to solve traffic problems in urban networks. In publications in the field of intelligent transportation systems, a vast amount of different optimal traffic light control methods is described. With new optimization methods being developed, it is important to know their performance compared to similar methods. Such a comparison is only possible if the same performance evaluation methodology is applied to all these methods. Most of the studies in the field of intelligent transportation system consider a self-defined evaluation methodology. A general evaluation methodology is developed to objectively evaluate the performance of these optimization methods. The developed general evaluation methodology is used to evaluate the performance of a dynamic programming and Q-learning method.
Advisors/Committee Members: Hegyi, Andreas (mentor), Czechowski, Aleksander (mentor), De Schutter, Bart (graduation committee), Dabiri, Azita (graduation committee), Lu, Meng (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: traffic light control; Performance Evaluation; General Evaluation Methodology
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hillebrink, A. (. (2018). Optimal traffic light control: performance evaluation applying a general evaluation methodology. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a2b5a1e7-f726-4d13-99fa-789031aa51bd
Chicago Manual of Style (16th Edition):
Hillebrink, Alwin (author). “Optimal traffic light control: performance evaluation applying a general evaluation methodology.” 2018. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:a2b5a1e7-f726-4d13-99fa-789031aa51bd.
MLA Handbook (7th Edition):
Hillebrink, Alwin (author). “Optimal traffic light control: performance evaluation applying a general evaluation methodology.” 2018. Web. 07 Mar 2021.
Vancouver:
Hillebrink A(. Optimal traffic light control: performance evaluation applying a general evaluation methodology. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:a2b5a1e7-f726-4d13-99fa-789031aa51bd.
Council of Science Editors:
Hillebrink A(. Optimal traffic light control: performance evaluation applying a general evaluation methodology. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:a2b5a1e7-f726-4d13-99fa-789031aa51bd
Delft University of Technology
8.
Dijkhuizen, Suzanne (author).
Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:0ebac80a-d005-4c17-9528-f62c303e6ac6
► With the arrival of Connected and Automated Vehicles (CAVs) concepts for traffic control systems emerge that let CAVs weave over the crossing area of an…
(more)
▼ With the arrival of Connected and Automated Vehicles (CAVs) concepts for traffic control systems emerge that let CAVs weave over the crossing area of an intersection. However, in the current literature, the safety of these vehicles is generally an assumption rather than a certainty. Moreover, the time period where CAVs and Human-Driven Vehicles (HDVs) share the road (i.e. hybrid traffic period) is often not considered by the design of these concepts. This paper describes technical and non-technical factors that influence the actual and perceived safety of passengers of HDVs and CAVs during the vehicle interactions that occur in the hybrid traffic period. The impact of the indicated factors on the actual or perceived safety of a vehicle is analyzed and described in terms of required safety margins around a vehicle. The size of the safety margins described depend on the positioning inaccuracy of the vehicle, its trajectory tracking inaccuracy, a time synchronisation inaccuracy, and on the preferred time headway, preferred driver space, and accepted time gap of the car occupants. Due to a lack of available data that could be used to compare the expected size of the safety margins around the vehicle with, this research presents a methodology to generate own data that could be used for this comparison. A virtual reality experiment was executed among 82 participants, which resulted in a 93% acceptance rate at a time gap of 1.5 seconds between one vehicle leaving and another vehicle entering their conflict area. It appeared that neither the crossing direction (left, right) nor the vehicle composition (HDV, CAV) of a vehicle interaction scenario influenced the perceived safety margins in front of the vehicle. The experiment found lower perceived safety margins in front of the vehicle than was expected according to the literature study. This may be the result of the sample not completely being comparable to the total drivers population. 2.0 seconds was accepted by 99% of the participants. The question arises what acceptance rate is desired to determine the minimum time gap that can be used as a perceived safety margin by future traffic control systems. The accepted time gap is expected to decrease as soon as more drivers get experienced with CAVs.
Transport, Infrastructure and Logistics
Advisors/Committee Members: Hegyi, Andreas (mentor), Salomons, Maria (mentor), Happee, Riender (mentor), Hoogendoorn, Serge (graduation committee), Bresser, Coen (graduation committee), Brouwer, Jeroen (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Actual Safety; Perceived Safety; Safety Margins; individual Space-Time Reservation; Hybrid Traffic Control System; Connected and Automated Vehicles; Virtual Reality Experiment
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APA (6th Edition):
Dijkhuizen, S. (. (2020). Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0ebac80a-d005-4c17-9528-f62c303e6ac6
Chicago Manual of Style (16th Edition):
Dijkhuizen, Suzanne (author). “Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period.” 2020. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:0ebac80a-d005-4c17-9528-f62c303e6ac6.
MLA Handbook (7th Edition):
Dijkhuizen, Suzanne (author). “Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period.” 2020. Web. 07 Mar 2021.
Vancouver:
Dijkhuizen S(. Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:0ebac80a-d005-4c17-9528-f62c303e6ac6.
Council of Science Editors:
Dijkhuizen S(. Safety Margin Development for a Space-Time Reservation Traffic Control System: A Research considering the Hybrid Traffic Period. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:0ebac80a-d005-4c17-9528-f62c303e6ac6
Delft University of Technology
9.
Machielsen, Martijn (author).
Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:2edfd4ed-cf36-4d34-a05c-aebb61505297
► To evaluate traffic signal controllers, and vehicle-actuated traffic signal controllers in particular, in terms of how they are performing with respect to the road authority’s…
(more)
▼ To evaluate traffic signal controllers, and vehicle-actuated traffic signal controllers in particular, in terms of how they are performing with respect to the road authority’s policies on traffic flow and accessibility, traffic safety, and environmental factors, several methods are developed in practice. However, in scientific literature, little attention is paid to this type of traffic signal controller evaluations. Indeed, it is found that a functional, and integral evaluation and diagnosis method for traffic signal controllers, based on a multi-variable assessment, is currently lacking. This thesis tries to fill this gap, by developing, and presenting an integral method, which detects inefficiencies in terms of traffic performance functioning, scores the vehicle-actuated traffic signal controller, diagnoses the cause of the detected inefficiency, and propose countermeasures to improve the traffic performance functioning of the vehicle-actuated traffic signal controller, based on a multi-variable assessment. This resulted in a five-step procedure, in which consecutively (1) the multi-variable performance indicators are selected, (2) the computational models are calibrated, (3) inefficiencies are detected, (4) the problems are diagnosed that caused the inefficient performance, and (5) optimises the traffic signal controller by implementing the countermeasures that aim at mitigating the diagnosed problems. The procedure includes a feedback loop to check whether the proposed countermeasures were effective. The testing of the method in a case study, using simulation data, showed that the method is indeed able to successfully detect inefficiencies, and diagnose the corresponding problems. Although the presented method is not perfect yet, its potential is clear. Therefore, it is recommended to develop the method further in the future, and include the use of data from practice as a way to make the method more widely applicable.
Advisors/Committee Members: Hoogendoorn, Serge (graduation committee), Hegyi, Andreas (mentor), Salomons, Maria (mentor), Spaan, Matthijs (graduation committee), Stern, George (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Traffic Signal Control; Decision support tool; Evaluation method; Diagnoses; Vehicle-Actuated Traffic Signal Control
Record Details
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Record Details
Similar Records
Cite
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Machielsen, M. (. (2019). Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2edfd4ed-cf36-4d34-a05c-aebb61505297
Chicago Manual of Style (16th Edition):
Machielsen, Martijn (author). “Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers.” 2019. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:2edfd4ed-cf36-4d34-a05c-aebb61505297.
MLA Handbook (7th Edition):
Machielsen, Martijn (author). “Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers.” 2019. Web. 07 Mar 2021.
Vancouver:
Machielsen M(. Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:2edfd4ed-cf36-4d34-a05c-aebb61505297.
Council of Science Editors:
Machielsen M(. Quicker Quality Scan: A Multi-Variable Evaluation and Diagnosis Method for Vehicle-Actuated Traffic Signal Controllers. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:2edfd4ed-cf36-4d34-a05c-aebb61505297
. 
Open Access Theses and Dissertations