Pneumatic tube test
A regularity test whose timing is triggered by driving over pneumatic tubes – similar to the light barrier test, but via the wheels.
The pneumatic tube test (German Schlauchprüfung) resembles the light barrier test but is triggered differently: timing starts and ends when the cars drive over pneumatic tubes laid across the road at the beginning and end of the test. Unlike the light barrier, which triggers at bumper height, the tube reacts to the wheels. As with any regularity test (GLP), scoring is based on keeping to the target time.
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Related terms
Light barrier
Photoelectric timing device that triggers the exact time as the vehicle passes – standard for timing special stages.
Light barrier test
A regularity test in which timing is controlled by photoelectric light barriers. Timing starts at the first barrier and ends at the second, triggered by the front of the car rather than the wheels.
GPS timing
Modern timing via a GPS box or transponder in the car: it records position and time continuously and allows measuring points with no visible installation on the road.