• Mohmad Altaf Shah
• Er. Sukhdeep Singh

Traffic congestion is a concern in the urban areas all over the world. Inadequate public transport, stagnant road infrastructure development and increased usage of private transport by the people of satisfy the travel demand has led to increase in congestion. Heterogeneous traffic on poor roadway and control condition has made the problem more complex in developing countries like India. Traffic congestion has resulted in travel delay and increased vehicular emissions.Studies have been carried out in developed countries to quantify congestion to evaluate the present situation and forecast the feature scenarios the methods have been successfully used to plan for additional infrastructure facilities and measures required to mitigate congestion. The existing methods used in Indian conditions are not sufficient to explain the congestion due to mixed traffic conditions. The popularly used V/C ratio and LOS to assess the quality of travel in urban areas have certain limitations due to fixed PCU adopted for the vehicles and the capacity norms proposed for urban roads. The present study is formulated with the objectives to build a mathematical model to quantify traffic congestion for heterogeneous traffic and also assign LOS to the study road stretches video graphic technic is used for data collection several stretches on Panthechowk, Dal Gate stretch have been marked for study the characteristics of the traffic have been analyze by extracting the relevant data from the digital video file.The flow on the urban roads is not continuous, the capacity of the urban roads depends on the capacity of intersections ahead the flow on the urban roads has both constrained and free flowing vehicles the flow rate is computed based on the actual time taken by the vehicle to cross based on the speed flow relationship established accounting the mix of traffic congestion index for heterogenous traffic flow is proposed based on the free flow time taken by a vehicle to cross the stream and the actual travel time, thereby improving LOS of the stretch which in term means less difference in free flow and actual travel time

Congestion, urbanization, congestion index (CI), free flow speed, heterogeneous traffic, level of service, quantifying congestion, passenger car equivalents, free flow, travel time, capacity, speed flow relationship

"CONGESTION MODELLING AND LEVEL OF SERVICE ASSESMENT OF URBAN ROADS IN DEVELOPING COUNTRIES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.2230-2240, August-2020, Available :http://www.jetir.org/papers/JETIR2008294.pdf

"CONGESTION MODELLING AND LEVEL OF SERVICE ASSESMENT OF URBAN ROADS IN DEVELOPING COUNTRIES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp2230-2240, August-2020, Available at : http://www.jetir.org/papers/JETIR2008294.pdf