Effect of Mixed Traffic Flow on Control Delay at Signalized Intersections

Operational analysis of transportation facilities is critical for making efficient use of existing transportation resources and for proposing improvements. Signalized intersections are the most complex locations in urban networks. The operational conditions of such intersectionsprofoundly affect the well being of the transportation of goods and passengers in cities. There are several methods available for operational analysis including mathematical models and traffic simulation models; however the Highway Capacity Manual (HCM) has been widelyaccepted and applied as a standard method. Three Measures of Effectiveness (MOE) commonly used to evaluate signalized intersection operations are capacity and volume-tocapacity (v/c) ratio, delay and queue. In the present research work, an attempt is made toestimate the capacity and v/c ratio, control delay and assign them to a Level of Service (LOS) at three identified signalized intersections of a medium sized city in India. The results obtained are analysed and remedial measures suggested to improve the operational performance of study intersections. In addition, the field measured control delay is compared with HCM 2000 delay model and Gopal Patil (2002) delay model developed for mixed traffic in India