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If the speed of overtaken vehicle is 80Kmph, then the design speed is _____

  • a)
    80kmph

  • b)
    100kmph

  • c)
    96kmph

  • d)
    106kmph

Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
If the speed of overtaken vehicle is 80Kmph, then the design speed is ...
Explanation:

The design speed of a road is the maximum safe speed that can be maintained on that road under favorable conditions. It is the speed for which the road is designed to accommodate.

Given, the speed of overtaken vehicle = 80 kmph

To determine the design speed of the road, we can use the following formula:

Design speed = (Speed of overtaken vehicle / 0.8)

Plugging in the given value, we get:

Design speed = (80 / 0.8) = 100 kmph

However, the above formula assumes favorable conditions, which may not always be the case. In reality, there may be factors such as curves, grades, and sight distances that can affect the safe speed of the road.

Therefore, the design speed is usually reduced by a certain percentage to account for these factors. This reduction factor is typically between 5% and 20%.

Assuming a reduction factor of 4%, we get:

Design speed = 100 - (4% of 100) = 96 kmph

Therefore, the correct answer is option C (96 kmph).
Free Test
Community Answer
If the speed of overtaken vehicle is 80Kmph, then the design speed is ...
Vb = V-16
V = Vb+16
V = 80+16 = 96Kmph.
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