The traffic detection system based on USMI 9601 sensor allows to know the main vehicles characteristics like counting, speed, length, height and to have information on traffic conditions like normal flow or queue, etc.

The system is made by the sensors, the local control unit complete of modem, and a software suite for Control Centre.

The USMI 9601 sensors use a radar-microwave technology, a ultrasonic and a passive infrared technology.

The radar is able to measure the vehicle’s speed using the “doppler effect” and the vehicle’s length (based on time of permanence of the vehicle under the radar beam).

Other features, like the counting of vehicles at low speed and the height detection of the vehicles, are devoted to the ultrasonic head and infrared beams.

The data detectedby the 3 heads (speed, length, height of the vehicle, gap, headway, etc.) are processed by a microprocessor with proprietary algorithms in order to obtain low error’s level in all traffic conditions (including queue and stop&go).

The microwave sensor is a “patch antenna” type (the horn-antenna radar has been substituted because too much sensible to electromagnetic fields) with side suppression of lobes in order to narrow the beam and to detect only the vehicles on the corresponding lane.

The USMI 9601 sensors are installed over the lane oriented on incoming traffic. The data collected/processed foreach vehicle are:

-Class

-Speed

-Length

-Height

-Time between vehicles

-Presence of queue and queue time

The vehicles are selected in eight or less different classes based on length and height of vehicles. The classes can be selected and changed via software.