• Er. Mohd Hassan
• Er. Navdeep Mor
• Dr. Hemant Sood

Heterogenous traffic conditions has become one of the major issue that need to be resolved in developing countries like India and traffic congestion made it difficult to adopt Level of Service (LOS) criteria as given in Highway Capacity Manual (HCM). It is believed that is the first step for selecting appropriate mitigation measures is the identification of congestion. Traffic Congestion- both in perception and in reality - influences the movement of vehicle and people. Traffic congestion wastes time, energy and causes pollution. Basically, there are two major factors responsible for traffic congestion. The first one is micro-level factors and the other is macro-level factors that relate to overall demand for road use. Congestion is ‘triggered’ at the ‘micro’ level (e.g. on the road), and ‘driven’ at the ‘macro’ level. i.e. micro level factors are, for example, many people want to move at the same time, too many vehicles for limited road space [1]. On the other side, macro level factors are e.g. land-use patterns, car ownership trends, regional economic dynamics, etc. The present study gives an overview and presents the possible ways to define LOS in the context of urban mixed traffic. A systematic review is carried out, based on measurement metrics such as speed, travel time/delay and volume and level of service. The review covers distinct aspects like definition; measurement criteria followed by different countries/organizations. The strengths and weaknesses of these measures are discussed. Further, a short critique of measurement criteria is presented. Most of the aspects covered are general and applicable in any country.

Level of Service, traffic volume, Speed

"Study of Level of Service (LOS) Criteria for Measuring Traffic Congestion- A Critical Review", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.339-344, June-2019, Available :http://www.jetir.org/papers/JETIR1906B53.pdf

"Study of Level of Service (LOS) Criteria for Measuring Traffic Congestion- A Critical Review", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp339-344, June-2019, Available at : http://www.jetir.org/papers/JETIR1906B53.pdf