A summit curve is provided on a road profile where:
An ascending gradient meets a falling one
In highway engineering, vertical curves are used to smoothen the change in gradient. A summit curve (crest curve) is provided where an ascending gradient meets a falling gradient — the road rises and then descends, creating a hill or crest. The design ensures adequate stopping sight distance (SSD) over the crest. In contrast, a valley curve is where a falling gradient meets a rising gradient.
Similar Questions
The friction factor used in geometric design of highways is provided by the:
In geometric design of highways, while on rolling terrain, design speeds are generally:
Important Questions from Highway Geometric Design
The rate of super-elevation for a horizontal curve of radius $500 \text{ m}$ in a national highway for a design speed of $65 \text{ kmph}$ is:
Consider the following statements about grade compensation:
(i) Grade compensation is given up to the maximum value of '75/R', where R is the radius of circular curve in metres.
(ii) According to Indian Roads Congress, grade compensation is not necessary for gradients flatter than 4 percent.
Which of the above statement/s is/are correct?
The type of transition curve that is generally provided on hill road is
The minimum design speed adopted where hair-pin bends are provided at hill roads is _________.
The rear wheels do not follow the same path as that of the front wheels. This phenomenon is called:
