Highway Engineering

261. The minimum design speed for hairpin bends in hill roads is taken as

1. 20 kmph
2. 30 kmph
3. 40 kmph
4. 50 kmph

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262. The minimum design speed of various types of highways in plain terrain is the same as the ruling design speed of

1. Rolling terrain
2. Mountainous terrain
3. Steep terrain
4. None of these

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263. The minimum ratio of the radii of two circular curves of a compound curve, is kept

1. 1.25
2. 1.5
3. 1.75
4. 2

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264. The minimum road width is taken

1. 9 m
2. 12 m
3. 16 m
4. 20 m

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265. The minimum super-elevation in rolling terrain in plains, is limited to

1. 4 %
2. 5 %
3. 6 %
4. 7 %

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266. The minimum value of camber provided for thin bituminous surface hill roads, is

1. 2.2 %
2. 2.5 %
3. 3.0 %
4. 3.5 %

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267. The minimum vertical clearance of overhanging cliffs or any other structure above the surface of a hill road, should be

1. 3 m
2. 4 m
3. 5 m
4. 6 m

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268. The minimum width of the pavement of a National Highway should be

1. 4.7 m
2. 5.7 m
3. 6.7 m
4. 7.7 m

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269. The most commonly adopted method to provide super-elevation on roads, is by pivoting the road surface about

1. Outer edge so that the inner edge is lowered
2. Crown so that outer edge is raised and inner edge is lowered
3. Inner edge so that outer edge is raised
4. None of these

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270. The most economical lighting layout which is suitable for narrow roads is

1. Single side lighting
2. Staggered system
3. Central lighting system
4. None of the above

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