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Volume count varies considerably with time.
Hence, several types of measurement of volume are commonly adopted to average
these variations.
These measurements are described below:
This is given by the total no. of vehicles passing through a section in a year
divided by 365.
This can be used for following purposes:
- Measuring the present demand for service by the street or highway
- Developing the major or arterial street
- Evaluating the present traffic flow with respect to the street system
- Locating areas where new facilities or improvements to existing
facilities are needed.
This is defined as the average 24-hour traffic volume occurring on weekdays
over a full year.
An average 24-hour traffic volume at a given location for some period of time
less than a year.
It may be measured for six months, a season, a month, a week, or as little as
two days.
An ADT is a valid number only for the period over which it was measured.
An average 24-hour traffic volume occurring on weekdays for some period of time
less than one year, such as for a month or a season.
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