'Kerb return radius' at an intersection corner is designed for:
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Only for pedestrian crossing zebra markings
Turning radius of design vehicle (left-turn) — determines kerb geometry, affects both vehicle operation and pedestrian safety
Speed of through traffic on major road
Drainage inlet sizing at corner
Correct Answer
B. Turning radius of design vehicle (left-turn) — determines kerb geometry, affects both vehicle operation and pedestrian safety
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Kerb return radius: governs turning radius of left-turning (in India: left turn, same as right in US/UK) vehicles at intersection. Small radius: forces slow turning speed (good for pedestrian safety), but may block through traffic if trucks need to swing wide. Typical values: 6–9 m radius for light vehicles; 12–15 m for heavy vehicles. Design vehicle turning radius determines minimum kerb radius.
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