Webster's Delay Formula - revisited.
The equations laid down by Webster in his famous 1958 book [Webster1958] are still the basis of traffic signal planning today. They are being used in handbooks like the HCM and similar instruments...
View ArticleA Clustering Approach to Assess the Travel Time Variability of Arterials
The travel time variability may significantly influence the driver’s route choice. Estimating travel time reliability is thus really appealing to urban infrastructure managers. This could provide...
View ArticleAssessment of Pre-Preemption Strategy of Traffic Signals near Railroad Grade...
The current railroad crossing preemptions consider only safety issues involving train-vehicle crashes and allow the abbreviation of the vehicular minimum green time and shortening/omitting of the...
View ArticleQueue Spillback Detection and Signal Control Strategies Based on Connected...
Queue spillbacks create excessive delays and may result in gridlock conditions in signal controlled networks. The information from Connected Vehicles (CV) offers significant potential for developing...
View ArticleEffect of Reducing Maximum Cycle Length on Roadside Air Quality and Travel...
The Sydney Coordinated Adaptive Traffic System (SCATS), an adaptive signal system designed to reduce congestion, has been installed on a heavily trafficked roadway in Portland, OR. In addition to...
View ArticleThe Tide: Evolution of Train Detection at Hampton Roads Transit
Hampton Roads Transit opened its new light rail system, The Tide, in Norfolk, Virginia, on August 19, 2011. The Tide is 7.4 mi in length and extends from the Eastern Virginia Medical Center–Ft. Norfolk...
View ArticleRelationship Between Mobility and Environmental Externalities at Signalized...
Characterizing the relationship between mobility and environmental factors is critical for developing a sustainable traffic signal control system. In this study, the authors investigate the...
View ArticlePedestrian Accommodation in Intersection Signal System: Rule-Based Dynamic...
In intersection signal timing, pedestrian is quite often treated as a "slave phase" (while vehicle is master phase) that results in unnecessary pedestrian delays, and evoke high pedestrian signal...
View ArticleRed or Green: Estimating the Patterns of Traffic Signals Through Cyclists’...
Advanced routing and navigation incorporating real time traffic information is state of the art - at least for car drivers. The potential of cyclists using digital navigation even to reach familiar...
View ArticleEmpirical Analysis of Controller Event Data to Select Vehicle Detector Fault...
Proper detection of both vehicles and pedestrians is critical for operations of signalized intersections, especially for intersections utilizing adaptive traffic signal control. Thus, it is important...
View ArticleOn the continuum approximation of the on-and-off signal control for dynamic...
In the modeling of signalized junctions, a signal control is typically expressed as an on-and-off control in continuous time, or as a binary variable in discrete time. One way of approximating such...
View ArticleA Coupled Linear Programming Approach for Decentralized Control of Urban Traffic
Managing urban traffic systems constitutes a challenging task, partly due to the fact that queue spillbacks arise easily in moderately congested networks, which incur loss of intersection capacities...
View ArticleUnderstanding Pedestrian and Bicyclist Compliance and Safety Impacts of...
With increasing energy costs as well as rampant congestion in major U.S. cities, the popularity of walk and bike mode choices have increased in recent years. Thus, the attainment of a comprehensive...
View ArticleAnalysis of Red-Light Running Behaviors of Bicycle Riders at Signalized...
Red-light running behaviors of bicycle riders at crossing facilities lead to a large number of traffic conflicts and high collision potentials. The primary objective of this study is to analyze the...
View ArticleThe Impact of Intersection Design on Pedestrians' Choice to Cross on Red
The existing research and modeling applications for predicting pedestrians’ decisions to cross on red at signalized intersection most commonly model this as a function of the pedestrian’s...
View ArticleNew Dilemma Zone Protection Algorithm Based on Real-Time Vehicle Trajectory
Dilemma zone (DZ) has been recognized as a major potential causing rear-end and right-angle crashes, especially at high-speed signalized intersections. The conventional DZ protection systems use...
View ArticleEnhancing Driver Stop/Run Modeling at the Onset of a Yellow Indication using...
The ability to model driver stop/run behavior at signalized intersections is critical in the design of advanced driver assistance systems. Such systems can reduce intersection crashes and fatalities by...
View ArticleProbabilistic-Based Capacity Model at Signalized Intersection Approach with...
In the design of intersections, the method of adding lanes at approaches is a common way to improve the capacity of intersections. Limited by the length, the extended short-lane may cause the vehicle...
View ArticlePriority System for Multimodal Traffic Signal Control
There are many users of signalized traffic intersections including passenger vehicles, commercial vehicles/trucks, pedestrians, bicycles, transit buses, light rail vehicles, snowplows, and emergency...
View ArticleMultiobjective Group-Based Signal Optimization Model for Mixed Traffic Flows...
The conventional stage-based signal control approach with uniform phase structure is dominantly applied at signalized intersections in China so far. Such an approach is hard to efficiently handle the...
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