5Technology options#
Various technologies support the traffic sensor function of vehicle detection, classification and WiM. Table 5 lists the sensors used in this document.
Table 5 – Sensor technologies
| Sensor technology | Application |
|---|---|
| Inductive loops | Vehicle detection, counter / classifier, WiM. |
| Passive infrared (PIR) sensor | Pedestrian counter. |
| Piezoelectric sensors | Vehicle counter, bicycle counter, vehicle classifier, WiM. |
| Pneumatic tubes | Temporary installations for vehicle detection, counter / classifier. |
| Strain gauges | WiM. |
| Video analytics camera | Active transport classifier. |
Irrespective of the sensor technology, detection accuracy depends on sensitivity of the sensors, sensor placement, and sensor array configuration. This document discusses the placement and installation of inductive loops, piezoelectric sensors, pneumatic tubes, PIR sensors, video analytics cameras and strain gauges, for the construction of vehicle detection site, traffic counting site, vehicle classification site, WiM site, and active transport site.