Question

The width carriageway required will depend on the intensity and volume of traffic anticipated to use the bridge.

a. Except on minor village roads all bridges must provide for at least two-lane width

b. The minimum width of the carriageway is 4.25 m for a one-lane bridge

c. The minimum width of the carriageway is 3.75 m for a one-lane bridge

d. The minimum width of the carriageway is 7.5 m for a two-lane bridge

Which of the following statement(s) given above is/are incorrect.

1. Only a
2. Only a and c
3. Only a, c and d
4. Only c

Answer 1

Correct Answer - Option 2 : Only a and c

Explanation:

According to IRC 5: 1998, Clause 112

• The width of the carriageway for a bridge constructed for road traffic only, the width of the carriage should be minimum of 4.25 m for a single lane and 7.5 m for two lane ridge.
• It shall increase by 3.5 m for every additional lane of traffic for the multilane bridge.
• The width of central/verge/median when provided shall not less than 1.2 m.
• Road bridges shall be provided for one lane, two-lane or multiple of 2 lanes, three-lane bridges with 2 directional traffic shall not be constructed