| value | description |
|---|---|
| automobileClubPatrol | |
| cameraObservation | |
| freightVehicleOperator | |
| inductionLoopMonitoringStation | |
| infraredMonitoringStation | |
| microwaveMonitoringStation | |
| mobileTelephoneCaller | |
| nonPoliceEmergencyServicePatrol | |
| otherInformation | |
| otherOfficialVehicle | |
| policePatrol | |
| privateBreakdownService | |
| publicAndPrivateUtilities | |
| registeredMotoristObserver | |
| roadAuthorities | |
| roadOperatorPatrol | |
| roadsideTelephoneCaller | |
| spotterAircraft | |
| trafficMonitoringStation | |
| transitOperator | |
| vehicleProbeMeasurement | |
| videoProcessingMonitoringStation |