saving of fuel quality of improvement in environment reduced number of points of conflicts short joining distances
Answer Discuss in Comment
vehicles move in the same direction left turn is relatively easy traffic is in continuous motion no waiting by traffic
occupying the least space number of points of conflicts is nil easy right turn no speed restriction
easy drainage grade of wearing coarse improved appearance easy separation of up and down traffic
easy overtaking facility permeability of subgrade amount of rainfall smoothness of base coarse
heavily loaded (but with a light material as cotton) bullock cart a fast moving motor cycle a road that is always dry a long truck with a trailer
Base course Sub base Sub grade Wearing course
Base course Sub base Sub grade Base coat
Wearing course Base course Sub base Sub grade
it acts as a bridge to cover minor depression like irregularity any small rift further widens its ability to withstand iron wheeled traffic is less no crack occurs even if local settlement takes place
"Scientists dream about doing great things. Engineers do them."