Highway Research Record

V. TRAFFIC AND TRANSPORTATION
1.PLANNING AND MANAGEMENT
NEW PROJECTS
Evaluation of Urban Speed Limits in Arterial Roads

Date of Start:June 2004
Highways Research Station, Chennai (R)

Scope and objectives

(i) To assess the existing speed characteristics of vehicles plying on Arterial Roads.
(ii) To analyse the economical speeds of various types of vehicles
(iii) To evaluate an appropriate speed limit of vehicles plying on Arterial road with respect to capacity, speed accident       relationship, level of service and vehicle emission

Methodology
The road geometric survey and traffic volume survey would be conducted for arriving the volume/capacity ratio. Spot speed studies would be conducted to study the existing speed characteristics of the vehicle. Economical speed data for all types of vehicles would be collected from secondary sources in order to evaluate appropriate speed limits for all vehicles lane wise. Accident data would be collected. Data on number of over speed vehicles would be collected and speed – accident relationship would be arrived.