Speed signal
A speed signal is a special light signal from a traffic light that recommends a certain speed to the vehicle driver. If the vehicle driver adheres to the recommended speed, he will (theoretically) reach the next traffic light when it is green and pass without stopping.
effect
It has been shown that if there are no indications of the most favorable driving speed within a green wave, the mass of vehicles increasingly dissolves. The same effect also occurs with very large distances between successive traffic lights. The result is that the continuous and homogeneous flow of traffic within the green wave is interrupted. With the aid of speed signals, the peak and the end of the vehicle bunch can be deliberately decelerated or accelerated, so that the vehicle bunch is merged. In this way, all vehicles in a group move theoretically with the calculated progression speed and drive along in the green wave.
application
Despite their efficiency, speed signals are not widely used. The guidelines provide for the following applications:
- Control of the vehicle cluster in the event of unfavorably coordinated green times within a green wave
- Bridging jumps in the cycle time of a green wave
- Prevention of the vehicle powder solution
Signal funnel
Speed signals can also be used as a so-called signal funnel. With the help of several successive speed signals, the vehicles are grouped together in such a way that they mathematically pass the next traffic light or the first traffic light on a street when it is green. In order to achieve a favorable effect, the distance between the speed signals should be 200 to 300 meters.
Locations
In the form of a traffic light:
-
Burghausen , speeds: 30, 40, 50
- Burgkirchener Strasse: 48 ° 10 ′ 9 ″ N , 12 ° 49 ′ 0 ″ E , 48 ° 10 ′ 16 ″ N , 12 ° 49 ′ 12 ″ E
- Robert-Koch-Strasse: 48 ° 9 ′ 58 ″ N , 12 ° 49 ′ 19 ″ E , 48 ° 10 ′ 6 ″ N , 12 ° 49 ′ 24 ″ E
-
Düsseldorf , Bundesstrasse 8 , speeds: warning, 60
- Mecumstrasse: 51 ° 12 ′ 2 ″ N , 6 ° 47 ′ 19 ″ E , 51 ° 12 ′ 2 ″ N , 6 ° 47 ′ 19 ″ E
- Witzelstrasse: 51 ° 12 ′ 2 ″ N , 6 ° 47 ′ 19 ″ E , 51 ° 11 ′ 49 ″ N , 6 ° 47 ′ 48 ″ E
- Werstener Strasse: 51 ° 11 ′ 49 ″ N , 6 ° 47 ′ 53 ″ E , 51 ° 11 ′ 47 ″ N , 6 ° 47 ′ 57 ″ E
- Flensburg , speeds: 60, 70, 80
-
Goettingen
- Bundesstrasse 3 (Kasseler Landstrasse), 51 ° 31 ′ 48 ″ N , 9 ° 53 ′ 40 ″ E , speeds: 40, 50, 60
- Kreuzbergring, speeds: 30, 40, 50
- Haßloch on the L532 between Lachener Weg and Rennbahnstraße, speed 40 km / h
-
Neu-Anspach on Theodor-Heuss- / Adolf-Reichwein-Straße, a total of four times, speed 40 km / h
- Inland 50 ° 18 ′ 15 ″ N , 8 ° 30 ′ 59 ″ E and at the following traffic light
- Out of town 50 ° 18 ′ 0 ″ N , 8 ° 30 ′ 22 ″ E and at the following traffic light
- Salzgitter , districts Lebenstedt and Bad
- Telgte on federal highway 64
- Wiesbaden , Zietenring, Kurt-Schuhmacher-Ring at the level of the St. Elisabeth Church
- Wulfen , Hervester Straße towards Federal Highway 58 51 ° 42 ′ 45 ″ N , 7 ° 0 ′ 41 ″ E
- L562 Siegen-Seelbach , Siegen-Trupbach
As a variable message sign:
- Berlin , Heerstraße at number 58 52 ° 30 ′ 29 ″ N , 13 ° 14 ′ 56 ″ E
- Heidelberg , Speyerer Strasse ( 49 ° 22 ′ 55.1 ″ N , 8 ° 39 ′ 12.9 ″ E ) and Berliner Strasse, since 2009
As a variable message sign in the USA:
- In Longview, Washington , 15th Avenue, level with East Kessler Blvd (dismantled) 46 ° 7 ′ 37 ″ N , 122 ° 56 ′ 28 ″ W The basis was a converted speedometer system .
Norms and standards
Germany:
- Guidelines for traffic light systems (RiLSA)
Web links
Individual evidence
- ^ Research Society for Roads and Transport: Definitions, Part: Transport Planning, Road Design and Road Operation . FGSV Verlag, Cologne 2000, p. 81 .
- ↑ Andreas Richter: Speed specification for traffic lights . DUV, 2005, ISBN 3-8244-0828-7 , pp. 33 and 34 .
- ↑ Andreas Richter: Speed specification for traffic lights - technical aspects and economic benefits , accessed on January 14, 2014.
- ↑ Green wave in Speyerer and Berliner Straße - signs show the speed at which you are “green” - new signaling technology for the access to the campus , Stadtblatt (Official Gazette of the City of Heidelberg), 17th year, issue no. 19 from May 6th 2009.
- ^ Information Display Company introduces traffic signal timing signs , traffictechnologytoday.com, June 9, 2009, accessed January 18, 2014.
- ↑ Manufacturer information cf. Google Streetview: September 2012 image , accessed January 18, 2014.
Map with all coordinates: