Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 41 for “"traffic signals"”.
-
Cost-effectiveness of smart traffic signals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 1991.
-
Bicycle detection through the use of inductance loop detectors at vehicular actuated traffic signals
… motorized vehicles, this increase in bicycle traffic has led to a number of relatively new traffic engineering problems. One problem that frequently occurs involves bicyclists that attempt to pass through intersections controlled by vehicular actuated traffic signals. The proper operation of a …
-
Is LED use in traffic signals viable in the Texas Department of Transportation, Houston District?
Light Emitting Diode (LED) is used in traffic signals and highway illumination in the Texas Department of Transportation, Houston District (TxDOT). The thesis focuses on the cost of maintenance of the LED for signals on the highway system in the Houston District. This LED cost includes human and …
-
Signal Phasing Strategies for Intersections with an Exclusive Bicycle Path
… installing experimental exclusive bicycle traffic signals in conjunction with vehicular traffic signals. These signals, mostly found at intersections with protected two-way bicycle paths, may cause operational inefficiencies if unsatisfactory phasing strategies are used. The source of the …
-
Methodology to Assess Traffic Signal Transition Strategies Employed to Exit Preemption Control
… vehicles to preempt the normal operation of traffic signals has the potential to improve the safety and efficiency of both the requesting vehicle and all of the other vehicles. Little is known about which strategy is the most effective to exit from preemption control and transition back to …
-
On generating driving trajectories in urban traffic to achieve higher fuel efficiency
… a vehicle with information about upcoming traffic signals has been developed. The toolkit can be used to investigate how to generate the optimal velocity profile with upcoming traffic signals based on a model of second-by- second fuel consumption. To this purpose, we employ an instantaneous …
-
Eco-Cooperative Adaptive Cruise Control at Signalized Intersections Considering Vehicle Queues
Traffic signals typically produce vehicle stops and thus increase vehicle fuel consumption levels. Vehicle stops produced by traffic signals, decrease vehicle fuel economy on arterial roads making it significantly lower than that on freeways. Eco-Cooperative Adaptive Cruise Control (Eco-CACC) …
-
Modeling Transit Vehicle Travel Time Components for Use in Transit Applications
Traffic congestion has continued to grow as a result of urbanization, which is associated with an increase in car ownership. As a way to improve the efficiency of the transportation system, emerging technologies including Connected Automated Vehicles (CAVs), loop detectors, Advanced Traveler …
-
An adaptive fuzzy logic controller for intelligent networking and control
… logic control scheme to regulate the flow of traffic approaching a set of intersections. An adaptive Fuzzy Logic Traffic Controller (FLTC) is used to adjust the green phase split of the north-south and east-west approaches of a set of traffic signals based on the actual traffic approaching the …
-
Technology migration and disruption : a case study of the solid state lighting industry
… 1960's, is quickly affecting our lives. New traffic signals, architectural lighting solutions, theater lighting and even lights in our local restaurants are now cool, efficient and pleasing to the eye. This thesis is intended to establish the state of the art of SSL and to provide a palette …
-
Cooperative Decentralized Intersection Collision Avoidance Using Extended Kalman Filtering
… occur at road intersections. Stop signs and traffic signals are some of the intersection control devices used to increase safety and prevent collisions. However, these devices themselves can contribute to collisions, are costly, inefficient, and are prone to failure. This thesis proposes an …
-
Modeling and Assessment of State-Of-The-Art Traffic Control Subsystems
Traffic signals are one of the vital control elements of traffic management and control systems under purview of Departments of Transportation (DOTs) nationwide. They directly affect mobility, safety, and environmental parameters of the transportation networks. Traffic engineers in DOTs often face …
-
Finding ways out of congestion for the Chicago Loop : a microscopic simulation approach
… in the U.S., has experienced a great increase in traffic congestion, which limits regional mobility, induces a huge amount of energy waste and Greenhouse Gas emissions, and impedes economic development. Due to congestion, bus reliability and travel speed has decreased significantly. Since the …
-
Cooperative Automated Vehicle Movement Optimization at Uncontrolled Intersections using Distributed Multi-Agent System Modeling
… is a challenging problem. Traditional traffic control strategies, such as traffic signals are not optimal, especially for heavy traffic. Alternatively, centralized automated vehicle control strategies are costly and not scalable given that the ability of a central controller to track …
-
Eco-cooperative adaptive cruise control at multiple signalized intersections
Consecutive traffic signals produce vehicle stops and acceleration/deceleration maneuvers on arterial roads, which may increase vehicle fuel consumption levels significantly. Eco-cooperative adaptive cruise control (Eco-CACC) systems can improve vehicle energy efficiency using connected vehicle …
-
Field Evaluation of the Eco-Cooperative Adaptive Cruise Control in the Vicinity of Signalized Intersections
Traffic signals are used at intersections to manage the flow of vehicles by allocating right-of-way in a timely manner for different users of the intersection. Traffic signals are therefore installed at an intersection to improve overall safety and to decrease vehicular average delay. However, the …
-
Learning to Tackle Task Variations in Control - A Transportation Context
… For example, in the task of controlling traffic signals, control strategies must adapt to different intersection topologies (the variations), each with distinct dynamics. In this thesis, we consider the challenge of coping with task variations in the context of transportation problems, …
-
Planning for autonomous vehicles : ridesharing and traffic control
… use of SAVs would have significant effects on traffic congestion, we develop a new tabu search heuristic for the SAV routing problem under the influence of traffic congestion. The algorithm aims to minimize traveler’s travel time. It considers several adjacent solutions by repeatedly swapping …
-
Listening to Museums: Sounds as objects of culture and curatorial care
… a means by which post-industrial sounds such as traffic signals for the visually impaired and those made by public transport, may be considered deserving of protection by museum practitioners.These ideas are then tested via creative practice by establishing an experimental curatorial project, The …
-
Evaluation of coordinated and local ramp metering algorithm using microscopic traffic simulation
Ramp meters are special traffic signals at the end of a freeway on-ramp that regulate the flow of traffic onto the mainline. The main purpose of ramp meters is to keep the mainline of the freeway from becoming overly congested, and to maximize the efficient use of freeway capacity. The first use of …
Page 1 of 3