A highway curve is an arc which connects two straight lines which are separated by some angle called deflection angle. This situation occurs where the alignment of a roadway or railway changes its direction because of unavoidable objects or conditions. There are two types of curves in highway construction which range from horizontal curve and vertical curve. Curves are provided whenever a road changes its direction from right to S (vice versa) or changes its alignment from up to down (vice versa). Curves are a critical element in the pavement design. They are provided with a maximum speed limit that should be followed very strictly. Following the speed limit becomes essential as the exceed in speed may lead to the chances of the vehicle becoming out of control while negotiating a turn and thus increase the odds of fatal accidents. Also, it is very necessary that appropriate safety measures be adopted at all horizontal and vertical curves to make the infrastructure road user friendly and decrease the risks of hazardous circumstances.
Importance of curves in highway
Different types of highway curves
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