Average Daily Traffic

According to NCHRP Report 765, average daily traffic (ADT) reflects the average number of vehicles that travel through a segment of roadway over a short-term period. The ADT is the raw, non-factored count data obtained by a short-term traffic count (usually a 24- to 48-hour period) typically collected on Tuesday, Wednesday, and Thursday. The ADT is an important, basic unit of traffic monitoring and is essential for developing traffic forecasts.

This site uses cookies to learn which topics interest our readers.