ESSENTIAL REQUIREMENTS FOR PASSING PLACES OR LAY -BYES, FOR HILL ROADS.

There is no need of providing passing places on two -lane National and State Highways having roadway widths as recommended. But in the case of single lane sections on National /State highways which have a narrower road way, provision of some passing places will be desirable. On other categories of roads, these should be provided in the general at the rate of two or three per Kilometre. Normally these should be 3.75 mt wide, 30 mt long on the inside edge and 20 mt long on the outside edge. Camber is provided on the all straight reaches of a road and superelevation is given to the curved position. On superelevated sections, the shoulders should normally have the same cross fall as the pavement. The cross-fall for earth shoulders should be atleast 0.5 percent more than the pavement camber subject to a minimum of the three percent. If the shoulders are paved a cross -fall appropriate to the type of surface as mentioned above should be selected.