15.4 - Extra Widening
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Practice Questions
Test your understanding with targeted questions
What is extra widening in road design?
💡 Hint: Think about how roads differ in straight versus curved areas.
Define mechanical widening.
💡 Hint: Consider the paths of front and rear wheels.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is extra widening?
💡 Hint: Think about how intersections differ from curves.
True or False: Off-tracking occurs when a vehicle’s rear wheels follow a shorter path than the front wheels.
💡 Hint: Consider the movement pattern of vehicles around corners.
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Challenge Problems
Push your limits with advanced challenges
Calculate the total extra width required for a road curve with a radius of 300m, design speed of 60 km/h, and two lanes, considering both mechanical and psychological factors.
💡 Hint: Utilize the formulas given in class to derive your solution.
Design a curve scenario for a highway. Illustrate the importance of addressing extra widening while considering high-speed vehicles and heavy trucks.
💡 Hint: Refer to IRC guidelines for maximum permissible widenings.
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Reference links
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