Apparatus and method for determining presence of objects in...

Apparatus and method for monitoring the output of a warning...

Apparatus for controlling traffic lights

Backup traffic signal management system and method

Device for validating digital message applicable in particular t

Fail-safe stop light apparatus

Fault detection for traffic light systems using electronic...

Lamp sensing system for traffic lights

Method and apparatus for monitoring electrical devices

Method for the provision of malfunction protection for lights in

Monitoring a conflict detector for traffic-lights

Portable conflict monitor testing apparatus

System for traffic signals for one-side passing

Traffic control malfunction management unit with co-channel...

Traffic control malfunction management unit with per channel...

Traffic control malfunction management unit with per channel...