CST Level 1 Land Surveyor Certification Practice

In highway terms, what does "Degree of Curve" indicate?

1. Angle subtended by the longest chord

2. Angle subtended by 100 ft. arc

3. Angle subtended by 50 ft. arc

4. Radius of the curve

The correct answer is: Angle subtended by 100 ft. arc

The Degree of Curve in highway terminology specifically refers to the angle subtended by a 100-foot arc. This measurement is significant for road design and helps to standardize the description of curves on roadways. By using a fixed length for the arc (100 feet), engineers and planners can easily calculate and evaluate the sharpness or gentleness of a curve. This method of measurement allows for straightforward comparisons between different curves. A higher degree indicates a tighter curve, while a lower degree indicates a gentler curve. This concept is fundamental in designing safe road geometries, ensuring that vehicles can navigate curves with adequate safety at various speeds. Utilizing this method aids in producing a consistent understanding of how curves will affect vehicle dynamics and driver behavior.