JAMAR Technologies TRAX I, Руководство пользователя

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4-5
L 3 ó Two Channels with Lane Separation
A to B, B to A ó Basic, Volume
In this layout, both tubes (A and B) are extended across the lanes to be
counted. Channel A and channel B record independent of each other. When
one tube is hit, the next hit is ignored. When in Volume mode the TRAX I
can do either a straight axle count or use the divide-by-two technique.
The tubes should be spaced four and a half inches apart.
EXAMPLE: The TRAX I has been programmed to use the divide-by-two
technique. A car is traveling southbound, approaching the tubes. As the
front and rear axles strike the A tube, a one is registered in the A channel.
The front and rear axles then strike the B tube but these hits are ignored
since the A tube has just been hit. Conversely, a car traveling northbound
will strike the B tube first (recording it in the B channel) and then have its
hits on the A tube ignored.
B
TRAX I
A
4.5 inch spacing
between tubes
24 ft.
North
36 ft. Round
26 ft. Mini
Chapter 4 — Road Tube Layouts