Operational assessments of the existing roads are based on the comparison between volumes of traffic during peak hours and the capacity of the existing road. The capacity of an existing road is determined by the width of road lanes, road width, traffic distributions, the composition of traffic, obstructions in the road side and the slope of the road. Table 2 shows the operation of main roads in the study area. Federal Highway 2 (Klang-Shah Alam) operates more than 54% above the capacity of existing roads. Similarly, North Klang Straits Expressway operates more than 40% above the capacity of existing roads, while Federal Route 2 (Port Klang-Northport) has reached the capacity of existing roads.