Correct option is B
Road Shoulder:
It is a kind of pavement strip on the outside of an outer lane.
IRC recommends a minimum shoulder width recommended by IRC is 2.5 m.
It’s surface must be rough as compared to the adjacent road.
Shoulder width is required to provide lateral stability of vehicles and also act as a lane in case of emergency.
Cross slope for shoulder is 0.5% steeper than cross slope of pavement.
