• MANISH KUMAR
• SANA KHURSHID
• Md. ARSHAD HUSSAIN

This study has been concerned to check and analyse the impact of varying composition of traffic flow on the saturation flow that discharges from a section and to find the credibility of PCU values given in IRC for Indian conditions (heterogeneous traffic) and are there chances for further modification. Saturation flow and green time ratio are the common factors on which the basic capacity of signalized intersections depends. Both factors are affected by geometric characteristics and traffic behaviour, operating conditions, environmental and other prevailing conditions. In order to design a safe and efficient intersection, so that the needs of the existing and future traffic can be met, it is necessary to have an idea of all kinds of affecting parameters for saturation flow. Traffic data was collected during peak hours on intersections in sub urban area i.e., Jamshedpur using manual count method and same is brought back and listed in tabular form in excel. The data so analysed includes traffic volume during saturation period, traffic composition in different cycles, equivalent hourly volume and estimation of saturation flow in pcu/hr/m width of lane at both the intersections. The graphs were plotted for variation of vehicle share and effective green time against saturation flow and an attempt was made to develop relationship between saturation flow and percent share of different vehicles at both the intersections. This study emphasizes the importance of estimating PCU values based on actual field studies at signalized intersections, as PCU values are found to vary significantly in most cases when compared to PCU values provided in IRC: SP-41. In India, the Transportation System is characterized by inadequate roadway infrastructure and the lack of operational expertise. At present, the economic development of India has brought opportunities and tasks to the urban development authority for proper managing of the urban transportation system. The major challenge in the urban transportation system and management is to evaluate the roadway capacity of roads. It is required to increase the capacity, pavement strengthening and improvement of riding quality with safety measure on the major urban arterial roads as per present need. On analysing saturation flow with respect to effective green time at intersection it could be found out that there will be irregular pattern of increase or decrease in saturation flow. This indicates a result of mixed traffic on saturation flow, whereas in homogeneous traffic, saturation flow generally increases with increase in effective green time.

Saturation Flow, Signalized Intersection, PCU, Homogeneous Traffic

"EFFECT OF MIXED TRAFFIC ON SATURATION FLOW AT SIGNALIZED INTERSECTION IN SUB URBAN AREA: A CASE STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 8, page no.b227-b243, August-2022, Available :http://www.jetir.org/papers/JETIR2208131.pdf

"EFFECT OF MIXED TRAFFIC ON SATURATION FLOW AT SIGNALIZED INTERSECTION IN SUB URBAN AREA: A CASE STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 8, page no. ppb227-b243, August-2022, Available at : http://www.jetir.org/papers/JETIR2208131.pdf