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Highway Engineering - Engineering

Q1:

According to IRC : 52-1973, for a single lane National Highway in hilly region,

A width of the carriageway must be 3.75 m

B shoulders on either side must be 1.25 m

C total width of the road-way must be 6.25 m

D total of the above.

ANS:D - total of the above.

The total width of the carriageway for a single lane is 3.75 (NH/SH), Minimum shoulder to be provided is 1.25 on each side.
Thus total width will be ( 2S+carriage way)={(2×1.25)+3.75} = 6.25m.
Hence, D is the correct answer.