Majority of Indian National Highways and State Highways are two-lane roads. Due to heterogeneous traffic and increase in the number of vehicles every year, the speed, capacity and Percentile speed of these roads is very less. Nowadays these two-lane roads are upgraded into multilane highways. In this project an attempt is made to study the changes in traffic characteristics of road after its up gradation. Four traffic characteristics namely Spot Speed, Volume, Percentile Speed and Capacity are studied in this project. Data was collected from National Highway No. 361 which was two-lane road and is now up graded into four-lane road. The data of two-lane road and four-lane road was compared and analysed. Spot Speed is used to derive the distribution of traffic stream at a particular location. Flow or volume denotes the number of vehicles travelling on the road with respect to time. 15th, 50th, 85th percentile speed was calculated to study the traffic behaviour on road. Capacity was calculated by using Greenshield’s model.