| |
Problem Description
Every traffic engineer is aware of locations where a vehicle’s direction of travel should be detected. The location may be a freeway entrance, a one-way road, a left-turn lane etc.
The detection has to be reliable and consistent to ensure that the overall system can perform under all circumstances.
Comment: Why show count sites in addition to counting at directional loops?
Solution
The Canoga C900™ Vehicle Detectors can be configured for reliable and consistent detection of the travel direction of a vehicle. In each lane, six by six inductive loops are overlapped (3 ft spacing) and connected to channels 1 and 2 (or 3 and 4 for the four-channel detector). After the detector is configured for directional detection, the following can be observed:
- An output is generated on channel 2 when a vehicle travels from loop 1 to loop 2
- An output is generated on channel 1 when a vehicle travels from loop 2 to loop 1.
- All vehicles traveling in each direction are counted. The vehicle count is stored in the on-board memory for later analysis. Comment: One channel could count all vehicles rather than having both do direction detection.
The duration of the output may be user-defined depending on the implementation of the system: turning on warning lights, variable message signs or other warning system.
Two 701 Microloop sensors or two 702 Non-invasive Microloop sensor assemblies per lane can be used instead of the overlapping inductive loops.
Global Traffic Technologies offers site selection, installation, and turn-on service for traffic directional detection applications. Please contact your GTT System Consultant for a quote for a specific installations at (800) 258-4610 or sales@gtt.com. |
|
