01630004

Component

Studies have been carried out on delays at unsignalized intersections but there is hardly any report available on delays at unsignalized median openings on multi-lane divided urban roads. The present study estimates the average service delay of U-turning vehicles at the median opening and proposes service delay models based on microscopic analysis of delay data under highly heterogeneous and unruly traffic conditions. The data for the study were collected by video recording at seven different uncontrolled median openings on multi-lane divided urban roads in India. The conflicting traffic was measured as the exact number of conflicting vehicles (n) as seen by a particular U-turning vehicle. The number of conflicting vehicles and the opposing through traffic were found to affect the service delay and mathematical models have been proposed. The merging time was also estimated for different categories of vehicles. Furthermore, the effect of opposing traffic volume and delay on merging time is studied.

This paper was sponsored by TRB committee AHB40 Standing Committee on Highway Capacity and Quality of Service.

01618707

17-00925

English

18p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; Photos; References; Tables

Mathematical models; Median openings; Merging traffic; Microscopic traffic flow; Multilane highways; Traffic delays; Traffic volume; U turns; Urban highways

India

Highways; Operations and Traffic Management; Planning and Forecasting

Transportation Research Board Annual Meeting 2017 Paper #17-00925

TRIS, TRB, ATRI

Dec 8 2016 10:14AM