| Hardware Support - Recommended Tube Lengths and Setup |
Select the layout that you would like to view:
Layout: L12
Layout Type: Temporary Installation
Sensors Used: 4 Road Tubes
Spacing: Two Feet, A to C and B to D
Count Formats: Basic, Bin
Data Provided: Class, Speed, Gap,
Volume
Directions: 2 Directions, A to C, D to B
Layout Type: Temporary Installation
Sensors Used: 4 Road Tubes
Spacing: Two Feet, A to C and B to D
Count Formats: Basic, Bin
Data Provided: Class, Speed, Gap,
Volume
Directions: 2 Directions, A to C, D to B
This layout is used when speed or class data is needed for each lane on two lanes of traffic. It is essentially the same as the L11 layout, but for
bi-directional traffic. Sometimes referred to as a short tube-long tube setup, it consists of two 'short' tubes (A & C) that are installed over the first lane
and two 'long' tubes (B and D) that are installed over both lanes.
Vehicles in the inner lane hit all four tubes, but their hits on the B and D tubes are not counted since they were immediately preceded by a hits on the A
and C tubes. Vehicles in the outer lane hit only the D and B tubes.
With this layout, you sacrifice some accuracy for the convenience of only having to use one TRAX to record two lanes of data. For greater accuracy,
record each lane separately using an L5 layout, if the road location allows a TRAX to be installed on each side of the road.
bi-directional traffic. Sometimes referred to as a short tube-long tube setup, it consists of two 'short' tubes (A & C) that are installed over the first lane
and two 'long' tubes (B and D) that are installed over both lanes.
Vehicles in the inner lane hit all four tubes, but their hits on the B and D tubes are not counted since they were immediately preceded by a hits on the A
and C tubes. Vehicles in the outer lane hit only the D and B tubes.
With this layout, you sacrifice some accuracy for the convenience of only having to use one TRAX to record two lanes of data. For greater accuracy,
record each lane separately using an L5 layout, if the road location allows a TRAX to be installed on each side of the road.
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