Graphical Performance Measures for Practitioners to Triage Split Failure...
Detector occupancy is commonly used to measure traffic signal performance. Despite improvements in controller computational power, there have been relatively few innovations in occupancy-based...
View ArticleDesigning Traffic Signal Yellow and Change Intervals Considering Truck Impacts
The research presented in this paper quantifies the effect of heavy vehicles on the design of yellow and all-red intervals. Using empirical data from previous studies and truck performance...
View ArticleImproving Intersection Behavior through Delay-Based Left-Turn Phase Initiation
Serving protected left turn phases for one or two vehicles can often be an inefficient use of cycle green time when the opposing through movements are over capacity. This paper assesses the performance...
View ArticleAdaptive Signal Coordination for Heterogeneous Traffic Using Downstream...
Real time control of heterogeneous traffic characterised by mixed vehicle type and non-lane based movement is always a challenge for efficient and effective traffic management. Adaptive traffic signal...
View ArticleCorridor-Based Coordination of Learning Agents for Traffic Signal Control by...
This paper explores a new coordination strategy for an intelligent system of cooperative reinforcement learning agents that operate the signals of a congested traffic network. The enhanced coordination...
View ArticleDesign Guidelines and Conditions that Warrant Deploying Fully Actuated...
Most signal timing design documents focus their attention on critical parameters such as cycle, offset, and splits, but provide little guidance on other coordination parameters. The choice of settings...
View ArticleSignal Progression Impacts on Transit Buses as Travel Time Probes
This paper examines the growing use of transit buses as traffic probe vehicles for obtaining arterial travel times. Such fleet vehicles inherently behave differently than the private vehicle...
View ArticlePotential for Metering to Help Roundabouts Manage Peak Period Demands in the...
Roundabouts generally provide safety and other advantages. During peak hours, however, even moderate demands on an upstream approach can result in long delays and driver frustration over downstream...
View ArticleStructures 2014, Volume 1
This issue contains 10 papers concerned with structures. The papers are organized into three parts. The first part covers general structures. It includes papers on imposed bridge load stresses; an...
View ArticleResearch and Education 2014
This issue contains 8 papers concerned with research and education. Specific topics discussed are as follows: crowdsourcing and its application to transportation data collection and management; data...
View ArticleCrash Experience Warrant for Traffic Signals
The crash experience warrant in the Manual on Uniform Traffic Control Devices (MUTCD) specifies three criteria that must be met before a traffic signal can be considered for installation at an...
View ArticleOperation of Traffic Signal Systems in Oversaturated Conditions, Volume 1:...
This guide presents a rational approach for identifying traffic control strategies for mitigating oversaturated conditions at signalized intersections. The guide discusses the following components of...
View ArticleOperation of Traffic Signal Systems in Oversaturated Conditions, Volume 2:...
This research project included work in several areas related to the operation of traffic signal systems in oversaturated traffic conditions. Quantitative measures were developed that characterize the...
View ArticleTraffic Signal Systems 2014, Volume 2
This issue contains 9 papers concerned with traffic signal systems. Specific topics addressed include: design guidelines and conditions that warrant deployment of fully actuated coordination;...
View ArticleUse of Event-Based Traffic Data in Generating Time-Space Diagrams for...
The time-space (TS) diagram is a popular visualization tool in evaluating progression quality for signalized arterials, and most signal optimization software products (such as Synchro) can generate TS...
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