India is the nation with heterogeneous traffic condition and the increasing population day to day, this reduces the capacity of roads. The capacity of the roads is affected by the road geometric condition, driver’s behavior and the traffic condition on the roads. In the following study, the effects of road geometry and vehicle characteristic are seen on the capacity of roads. The study was done on the urban roads of Nagpur, Maharashtra. The roads taken in the study are of different types with different geometric conditions, which are analyzed by their conditions and dimensions of the roads. The second phase of the study deals with vehicular characteristics. The proportion of each type of vehicles has its own effect on the capacity of the roads. The speed of the vehicles is also an important factor for finding capacity. As the traffic in India is heterogeneous the Passenger Car Unit (PCU) is used for calculating the capacity of roads. The regression models are used to find the results of the proportional effects of vehicles and vehicle/speed on the capacity. The final capacity of the roads is done with the Greenshields model. The estimation of capacity is done from the linear equation generated by Greenshields model. And then results are compared with the result obtained from the regression model to find the effects of the roads.