sujet


DYNAMIC ROUTING MOTORWAY A8 MUNICH – SALZBURG, JUNCTION INNTAL, Bavaria, Germany

, 2010

Challenge

The passages of Brenner and Tauern are the important transit routes with an accordingly high traffic load. Especially during holiday traffic, this regularly leads to congestions due to capacity overload. Road works, accidents or bad weather cause further traffic disturbances. The effects go beyond regional and national borders.

Disturbances and recommended alternative routes were only available via radio. In case of massive traffic obstructions on the Brenner route approaching the junction Inntal, mobile warning signs with the according information were set up.

With the installation and integration of three large-sized dynamic routing signs with integrated congestion information (dWiSta) on the motorway A8 East in front of the motorway junction Inntal direction south, the road users can now extensively be informed about the current situation.

Details

The dWiSta chain on the A8 east at the junction Inntal direction south was installed additionally to the already existing blue routing signs. It consists of three sign gantries with programmable dWiSta signs in LED technology and the according outstations providing data and energy for the signs.

The information signs are approx. 13 m wide and 2.8 m high. Via 432 x 88 white LEDs in a distance of 30 mm up to four text lines can be displayed.

In the upper left and right corners of the display additional danger signs can be displayed in color such as congestion, road works or danger pictograms.

The first dWiSta display is located approx. 10 km in front of the junction Inntal, in front of the parking Eulenauer Filz. The road user has enough time to react to the displayed disturbance and alternative routing. A road user not familiar with the area can also stop at the parking and have a look at a road map for orientation.

The second dWiSta display is located approx. 900 m in front of the exit lane.

The third dWiSta display is located at the begin of the exit lane, about one kilometer in front of the spot where the decision must be made which route to take. The according sign gantry has already been designed for a five-lane extension of the junction Inntal in the future.

The information is displayed separately for each direction by means of the lane signaling arrows underneath the programmable display.

Coordination of the system

The highway police as well as the operating companies of the motorways in Austria (ASFINAG) and Italy (Autostrada del Brennero) inform the traffic information centre in Bavaria about the traffic situation on the Tauern and Brenner route. The switching diagrams of the dWiSta signs associated with the according traffic disturbance are coordinated and ordered by the traffic authorities in Austria and Italy. The traffic information centre judges the traffic situation and forwards a switching recommendation to the traffic management centre in Southern Bavaria which activates the switching of the diagram. The switching diagrams are stored in the traffic management centre in Southern Bavaria so that there is no need to enter the information every time.

Project content

  • 3 Display cross sections with dWiSta signs
  • 3 Roadside stations
  • SHDSL data transfer to the roadside station via TLS-over-IP

Realization

Start of constructions: July 2009.
Start of operation: June 2010.

Benefits

  • Information of disturbances on the Brenner or Tauern passage for the long-distance traffic
  • Display of alternative routes:
    - for serious disturbances on the Brenner route via Tauern route (destination Verona)
    - for serious disturbances on the Tauern route via Brenner route (destination Triest)
  • Display of disturbances or obstacles on the motorways A93 south or A8 east, such as road works, accidents, congestions, HGV bans in Austria or winter road conditions (without recommendation of alternative routes)

Pictures