Field Cycle Length Sweep to Evaluate Resonant Cycle Sensitivity

Cycle length selection in corridor timing is often dictated by critical intersections with the highest level of saturation. Along corridors with balanced volumes and favorable link distances, a resonant cycle length is often sought to provide good progression in both directions of travel. This paper discusses the search for a resonant cycle length at a 5-intersection corridor in Fishers, Indiana over a three month period. The software traffic model suggests a reasonable range of cycle lengths from 104 seconds to 124 seconds for the corridor. This cycle length range is consistent with analytical highway capacity manual delay minimization approaches. A set of eleven cycle lengths from the 104 to 124-second range are tested over 12 weeks, with each iteration using optimized offset values generated by the Link Pivot progression optimization algorithm to maximize the percentage of vehicles arriving on green, and holding all phase splits constant. There was no obvious resonant cycle identified in the cycle length sweep, however the experiment findings indicate vehicles arriving on green decrease and travel times increase as cycle length increases.As a tradeoff, the number of force off phase terminations on the side-street phases decrease as a result of longer cycles indicating a better accommodation of sidestreet demand. Finally, a Seemingly Unrelated Regression (SURE) model was used to analyze the correlation between cycle lengths, percent of vehicles arriving on green, and travel time indicating a negative correlation between higher cycle length and progression performance

Citizen Band (CB) Radio Communication Commenting on Indiana State Police Enforcement Activity

This audio was recorded from Citizen Band (CB) radio traffic on Channel 19 adjacent to mile marker 127.8 on I-65 in Indiana (Latitude 39.918554, Longitude -86.329367). The audio recording represents selected transmissions recorded at approximately 9:30am on 21 July 2010 documenting the public perception of an Indiana State Police enforcement detail that was occurring along I-65 and I-865 in Boone and Marion County. Approximately 12 different Indiana State Police personnel were involved in the enforcement detail at the time of the recording

Indiana Traffic Signal Hi Resolution Data Logger Enumerations

This document defines the enumerations used to encode events that occur on a traffic signal controllers with high resolution data loggers. The time resolution is to the nearest 100 milliseconds. Background information on the development of high resolution controller data in Indiana can be found at: Smaglik E.J., A. Sharma, D.M. Bullock, J.R. Sturdevant, and G. Duncan, “Event-Based Data Collection for Generating Actuated Controller Performance Measures, Transportation Research Record, #2035, TRB, National Research Council, Washington, DC, pp.97-106, 2007.http://dx.doi.org/10.3141/2035-11 Recent applications of high resolution data to develop traffic signal performance measures in Indiana can be found at: Outcome-Oriented Performance Measures for Management of Signalized Arterial Capacity http://dx.doi.org/10.3141/2192-03 Track Clearance Performance Measures for Railroad-Preempted Intersections http://dx.doi.org/10.3141/2192-06 Reliability, Flexibility, and Environmental Impact of Alternative Objective Functions for Arterial Offset Optimization http://dx.doi.org/10.3141/2259-02 Visual Education Tools to Illustrate Coordinated System Operation http://dx.doi.org/10.3141/2259 -0