Motorway fork

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A motorway fork (or fork or junction for short ) is a special form of the motorway triangle . In contrast to the triangle, there is no direct connection between two branches. In order to be able to switch back and forth between these two branches, you usually have to leave the motorway at the last motorway exit before the fork and drive over the local road network to the corresponding entrance of the other route - or at the first motorway exit after the fork leave the autobahn, drive it straight on in the other direction and take the other branch at the fork.

In the case of a motorway fork, which is also known as a motorway junction , only a bridge structure is necessary and the connecting ramp is always semi-direct , which means that traffic is only minimally slowed down. Such forks are used almost exclusively where there is already a connection between the unconnected branches at a short distance or where the volume of traffic in this direction is extremely low.

Examples

Germany

Porz motorway triangle
  • A special example is the A 352 , both ends of which are motorway bifurcations. Therefore, you can only drive onto the A 2 from the west and the A 7 only from the north.
  • In the course of the Berlin ring road A 100 : AS Gradestrasse A 102 and the triangle Charlottenburg A 111 . This is due to the abandonment of previous plans, whereby the resulting stub highways usually only have one or two exits. The expansion to a full triangle was never necessary, the missing connections lead via city streets.
  • Dreieck Nonnweiler ( A 1 / A 62 ) - From Pirmasens to Saarbrücken, the motorway has to be left for a few hundred meters in order to join the A 1 at the Nonnweiler-Otzenhausen junction. From Saarbrücken to Pirmasens, the slip road to the A 62 towards Pirmasens is directly behind the Nonnweiler-Otzenhausen junction of the A 1.

Great Britain

  • Between England and Wales , before crossing the River Severn, the M4 motorway splits into M4 to the new bridge and M48 over the old bridge. You can turn around on the Welsh side at Magor, junction 23. On the English side you have to change to the M5 and use the roundabout there at the Almondsbury exit. Since the old bridge with the M48 is very often closed in strong winds, there are diversion symbols on the motorway signs in the form of circles, triangles and squares.
Fork with the ability to turn
  • The M8 runs through Glasgow with two forks close together for the M77 and M74 , forming a parallel unbundling . At 55 ° 51 ′ 0 ″  N , 4 ° 16 ′ 42 ″  W , a turning facility is built into the connection point. The fork to the M77 thus has the functionality of a motorway triangle. The transition, quasi in the handle of the fork , is a small detour, but can be used jointly from and in both directions.

Austria

Sweden

  • To the east of the Swedish city of Malmo there is no connection between the feeder road "Västkustvägen" and the motorway E6 / E20 to the south ( 55 ° 39 '6 "  N , 13 ° 5' 53"  O ). Particularly confusing: if you drive south on the motorway and follow the sign for the next petrol station, you will suddenly land on the aforementioned feeder road. From the petrol station there is no longer any possibility of driving back south on the motorway.

Switzerland

  • At the Wiese junction there is no direct connection from the German A 5 , which becomes Autobahn 2 in Swiss territory , to Autobahn 3 (Nordtangente - Dreirosenbrücke) and on to the Alsatian A 35 in the direction of Mulhouse and vice versa. The traffic is conducted via the lower-level road network and the Wiesekreisel.
  • Junction La Croix on the Autobahn 9 near Lutry , from there the branch N9_CRCO La Croix - Corsy branches off.
  • Le Vengeron junction on Autobahn 1 . From Genève-Lac on the A1a (at ASTRA:) N1_GLVEthere is only a connection in the direction of Lausanne.

Hungary

  • Junction M1 to M15 at Hegyeshalom (coming from Austria towards Slovakia and vice versa)

See also

Web links