2024 Volume 15 Pages 2474-2493
The rapid urbanization of Nepal has resulted in increased population and vehicle registration, causing traffic congestion in urban areas. To implement effective reduction measures, it is necessary to identify congestion characteristics. As Free Flow Speed (FFS) is a key input parameter, this study aimed to develop an FFS model incorporating site-specific parameters. Six road sections of Koteshwor-Suryabinayak road were selected, and field and videographic surveys were conducted. FFS distribution of vehicle classes was found normally distributed, and vehicle class-wise speed limits were established. A multiple linear regression analysis was employed to develop a vehicle class wise and overall (2-W,4-W and Bus) FFS models. The overall model was found to be the most accurate. Therefore, the proposed model would be helpful in analysis of free flow speed in heterogenous traffic condition and determination of level of service of the road section of four lane divided urban sub-arterial roads.
