One of the most important features of a traffic detector is to classify vehicles with high accuracy. Depending on the technology used, detectors can classify vehicles according to several parameters. For example, radar detectors perform classification by length, ultrasound detectors by height and laser scanner detectors classify vehicles based on their profile. Precision and accuracy play a crucial role in vehicle classification and laser scanner sensors are by far the most accurate ones, providing a widest range of classes. This is why they are usually used in toll application: each class leads to a different pricing at toll stations (LSR2001 o RSR4001).
Even in applications such as traffic monitoring, it is important to gain valuable information about vehicles because each one produces different amounts and kinds of pollution, traffic flow and deterioration of roads.
Doppler radar sensors, such as MD01, are easier and less expensive and classify vehicles into 8 classes depending on their length.
Triple technology sensors (radar + ultrasound + infrared), such as USMI9601, classify vehicles into 8 classes depending on their height and length.