Two-Lane Bidirectional Traffic Flow Patterns

The paper aims to study the effects of an individual type of vehicle’s volume of both in-line and opposing traffic on the speed of vehicles. A relatively few studies have been conducted in India to observe the effect of opposing traffic volume on the speed of different vehicles and the entire traffic stream, whereas bidirectional traffic condition is the most prevailing condition in India. In this paper, results were obtained for the speed-volume relationship for five classes of vehicles: Car, motorized two-wheeler, motorized three-wheeler, bus/truck, and light commercial vehicle (LCV). The results obtained from this study can be used to calculate speeds for different traffic volumes and compositions, ascertain various traffic improvement measures, and evaluate the level of service for roads with similar traffic situations.