India has one of the largest road networks in the world, aggregating
to about 33 lakh kilometers at present. Though the National Highways,
which is the responsibility of Central Government, has length of roads,
carries over 40 percent of the total traffic across the length and
bredth of the country.
| National Highways/Expressways | 65,590 km |
| State Highways | 1,28,000 km |
| Major and other Disctric Roads | 4,70,000 km |
| Rural Roads | 26,50,000 km |
The National Highways have further been classifed depending upon the
carriageway width of the Highway. Generally, a lane has a width of 3.75 m
in case of single lane and 3.5 per lane in case of multilane National
Highways. The break-up of National Highways in terms of width is as
under:-
| Single Lane | 32 % |
| Double/Intermediate Lane | 56 % |
| Four Lane/Six Lane/Eight Lane | 12 % |
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