• Vijay B G
• Rajendra Khatawkar

In these days the traffic is expanding quickly and the activity conditions on Indian roads are exceedingly heterogeneous in nature because of variety of vehicles with various static and dynamic qualities. Due to unrestricted movements all fast and slow moving vehicles without any separation, the roads will face severe congestion and lower speeds. The greater part of national and state highways in India are two lane undivided roadway. These two lane highways achieve its greatest limit soon and require consistent up gradation to do this we need to estimate capacity of selected roads. In this present paper, attempts have been made to collect traffic volume for whole 7 days at national highways such as NH-206 & NH-209. Also tried to compute PCU values at selected stretches on highways by using those values attempts has been made to estimate capacity and to compare those values with the regression equation values. Finally from the present study we got ADT at different section on highways, calculated PCU values as per Chandra’s method at various sections on highways and got marginal difference with the values recommended by IRC. It is found that with the increase in lane width, speed and radius substantially caused increased in PCU value. Also we developed linear regression equations to estimate capacity and compared those values with the values as we got using Chandra’s method. In most of the cases the error is observed to be less than 3%. The percentage error is in the range between 0.02 and 2.41 which is very marginal. Finally from the study it has been observed that increase in lane width and radius at curves obviously increases the capacity their by increases both comfort and safety of the road users.

Traffic volume count, PCU, mean speed, Capacity, Linear regression equation

"Study of methods used for capacity estimation on Two lane undivided National Highways", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.178-186, February-2019, Available :http://www.jetir.org/papers/JETIR1902827.pdf

"Study of methods used for capacity estimation on Two lane undivided National Highways", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp178-186, February-2019, Available at : http://www.jetir.org/papers/JETIR1902827.pdf