-Speed and delay studies give the running speeds, Overall speeds, Fluctuations in speeds and the delay between two stations of a road spaced far apart.
- They also give the information such as the amount, location, duration, frequency and causes of the delay in the traffic stream.
- Various methods to carry out speed and delay survey are: 1. Floating car method 2. License plate record method 3. By interview 4. By photography and videography