01334177

Component

The lack of real-time data at signalized intersections has long been an issue among the traffic community. The purpose of this study was to determine if real-time delay estimates of reasonable accuracy could be made using only state-of-the-practice detection technologies. This study was divided into two phases: a simulation proof-of-concept phase and a field validation phase. This paper will focus on the field validation phase in which state-of-the-practice video detection was used to develop models to predict approach delay using only volume and occupancy. Prediction models were developed based on an excessively over-detected approach (for comparison purposes), based on approaches with 100’ and 200’ loop spacing, and based on approaches with two loop detectors: one at the stop line and one located some distance upstream. The field tests were able to estimate delay with varying degrees of reliability. The estimation deteriorated as the number of loops was reduced, but the method does show potential for real-world applications.

01329018

11-2344

English

18p

2011

Transportation Research Board 90th Annual Meeting

DVD

Figures; Photos; References (22)

Field tests; Loop detectors; Real time information; Signalized intersections; State of the practice; Traffic delays; Traffic estimation; Traffic models; Traffic signal cycle; Validation; Video cameras

Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2011 Paper #11-2344

TRIS, TRB

Feb 17 2011 6:08PM