Calculate the length of Summit Curve for a stopping sight distance of 180 m on a National Highway at the junction of an upward gradient of 1 percent and a downward gradient of 2 percent. Assume height of eye of driver to be 1.2 m and height of object above the roadway to be 0.15 m. Assume also S is less than L.

Transportation engineering or transport engineering is the application of technology and scientific principles to the planning, functional design, operation and management of facilities for any mode of transportation in order to provide for the safe, efficient, rapid, comfortable, convenient, economical, and environmentally compatible movement of people and goods transport. (Source: Wikipedia)

Transportation engineering is also a part of Urban planning.