Section 3: Definitions
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Manual Bank Board |
The board holding the keys or buttons of a tally counter which is used to manually record vehicle classification counts. |
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Manual Counts |
Measurement of traffic characteristics based on human observation in combination with a manual device. The terms manual counts and visual counts are used interchangeably. |
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Semi-trailer |
A detachable trailer for hauling freight with wheels at the rear end, and the forward end being supported by the rear of a truck or tractor. |
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Tally Counter |
The mechanical equipment that traffic counters use to manually record the number of vehicles – by classification – during a manual vehicle classification count. This equipment is also known as a traffic recorder. |
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Traffic Counter |
Personnel who count vehicles in a stream of traffic. |
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Traffic Counter Crew |
The number of traffic counters counting vehicles in a stream of traffic over the entire time period. |
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Traffic Data |
Individual facts, statistics, or items of information on traffic. |
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Traffic Recorder |
Portable traffic monitoring equipment that personnel use to manually tally classes of vehicles. This equipment is also known as a Tally Counter. |
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Traffic Volume |
The most basic form of traffic data collection. The total number of all vehicles at a given checkpoint. Each vehicle, regardless of body style or number of axles, counts as one volume. |
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Truck, Tractor, Straight Truck Power Unit |
These terms are used interchangeably to indicate a powerful motor-driven vehicle designed for hauling a trailer or semitrailer. |
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Vehicle Classification |
The measurement, summarization and reporting of traffic volume by vehicle type and axle configuration. Traffic counters must use the 13-category classification scheme recommended by the Federal Highway Administration (FHWA). |