Tunnels are subject to strict safety standards, because they are high -risk areas with limited access. We use a combination of technologies to accurately monitor and control traffic flows. These systems can also be used in car parks.

ANPR cameras

ANPR stands for automatic number plate recognition. An ANPR system reads number plates with the assistance of digital image analysis, then links that data to the information in the database of vehicle licensing authorities, so that drivers can be identified. These cameras can read both the number plates in terms of their numbers and letters, and recognise the country codes of number plates.

CCTV & AID cameras

Wired or wireless CCTV cameras monitor zones and movements in a closed circuit. They are operated from a control room, which allows them to be zoomed in or out, among other things, and send images in real time. Recorded images can be used as evidence in criminal cases, or for other purposes.

AID (automatic incident detection) cameras

These cameras can detect incidents autonomously, and warn road users about them. They are used to report situations such as incidents in tunnels and the presence of smoke, and to monitor the occupancy rate in a defined area.

VMS (Variable Message Systems)

VMS signs are generally installed above motorways, and inform road users about various events that may affect journeys. The signs have a large surface area fitted with LEDs, so they can display both pictograms and written messages. We distinguish between:

  • RSS – lane signalling: indication of speed limits or pictograms above each lane
  • (R)VMS: pictograms and text messages next to or above a lane

Detection loops

Double detection loops concealed in the road surface can calculate the speed and the length of each vehicle, so they can distinguish motor vehicles, cars, vans and the various combinations of trucks and trailers. This information is transmitted to the DTM system, which further processes this data.

DTM (Dynamic Traffic Management)

Various sensors or detection loops in the road surface monitor the traffic intensity and speed on each route section. Traffic jams can be detected in this way, for example, and road users warned in advance by VMS signs to slow down or use alternative routes.

Tunnel lighting

There are two tunnel lighting systems. Besides basic roadway lighting, we install intelligent adaptive tunnel lighting, This lighting system adapts the light intensity to the real time roadway environment conditions. It is controlled by light sensors outside the tunnel which measure ambient light intensity. It means road users do not suddenly have to adapt their eyes to being in a dark tunnel, so it improves safety.

Emergency lighting and escape route marker lights in tunnels

Escape route marker lights guide road users to emergency exits in case of incidents or emergencies. Emergency lighting provides tunnel emergency exits with sufficient illumination.

Tunnel ventilation

Tunnel ventilation makes sure that enough air circulates in a tunnel. A monitoring system constantly monitors air quality, and adjusts the quality via fans installed in the tunnel structure. In case of fire, the system can also discharge the smoke to the exterior.

Parking guidance

Dynamic parking guidance systems with electronic signs lead drivers to empty parking spaces. These systems take into account traffic density, and the occupation of the various connected car parks and defined parking places in real time. This reduces the amount of time spent looking for a parking space, so also limits CO2 emissions.

Shop and go parking

These are intelligent parking systems that make sure certain parking spaces are not occupied throughout the day, but only used for short-term parking. The system warns parking attendants if cars are left in a space for too long.

Weight in Motion

Pressure sensors in the road surface measure the load on a vehicle’s axle, and if this leads to suspicion of overloading, a vehicle can be diverted to a permanent axle weighbridge where the load on each axle can be measured.

In the future, these systems should be sufficiently reliable to be able to work autonomously and automatically emit fines in the case of violation of the GAWR. Overloaded trucks are responsible for damaging the road surface (rutting), so this system makes a lot of sense.