Bunching Effect of Motorised Two Wheelers on Delay at Signalized Intersections under Heterogeneous Traffic Conditions

The performance of signalized intersections is usually evaluated by measuring delay occurring to vehicles which are passing through the signalized intersections. The field delay under heterogeneous traffic condition will be influenced by many parameters such as cycle time, traffic volume, degree of saturation, percentage of different vehicle categories especially the bunching of motorized two wheelers. In the present research work, the delay is estimated from the field using Indian Highway Capacity Manual (Indo HCM) (2017) procedure and the bunching effect of motorised two wheelers is studied on delay at signalized intersections under heterogeneous traffic conditions. Also, a linear delay model is developed for control delay estimation considering heterogeneous traffic conditions. From the field data, it was observed that, the percentage of motorised two wheelers in a bunch is varying from 37% to 57% whereas the total average delay occurred to vehicles which are passing the approach is varying from 106 s to 163 s respectively.