Help Forum

Help requested posted on 16th January 2019:

Speed activated traffic lights

Welcome hearing if from others with experience of installing speed activated traffic lights as a measure in reducing speeding drivers.

E.g https://www.coeval.uk.com/case-studies/a78-behavioural-speed-reduction-vas-traffic-lights/

Francis Bernstein

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Response posted on 19th January 2019 by:
Jeff Harrison

E: jcandva.harrison@btinternet.com
T:

Speed activated traffic lights

Brilliant idea. Have seen them work in villages in Italy. I wish that we could have a set in our village.

It is vital to have warning signs ahead of the lights and effective APNR to pursue motorists that ignore the red light.


Response posted on 26th January 2019 by:
Martin

E: martin@mrfc.net
T:

Speed activated traffic lights

This idea was trialed in Croydon and works really well.
After making the connection with the lights changing to my speed I always kept below the limit so I didn't need to stop. Although there were no signs it became quite obvious my speed was making them change.


Response posted on 28th January 2019 by:
Derek Williamson

E: derek.williamson@transport.gov.scot
T: 01412727390

Speed activated traffic lights

Following the success of the scheme on the A78 in Fairlie, we are continuing to monitor a pilot study on the use of similar technology at two sites on the A75 in the village of Springholm. Monitoring of traffic speeds through the village are showing positive results in relation to speed reduction.


Response posted on 26th February 2020 by:
simon white

E: simon.white@leicester.gov.uk
T:

Speed activated traffic lights

Any update on this topic and known UK locations in use would be greatly appreciated. thanks


Response posted on 30th April 2020 by:
Christopher Wybrew

E: c.wybrew@btinternet.com
T:

Speed activated traffic lights

In [practice the systerm is very disappointing because traffic managers have set the signals to change very late after a speeding driver crosses the embedded trigger loop. Amber phase being far too close to signal halt line and faster HGVs fail to halt also the delayed onset of amber encourages many drivers of lighter vehicles to go faster to beat the commencement of the red phase. For full info and video of signal fails visit Springholm A75 Road Safety Campaign Facebook page or the website bypass-speringholm http://bypass-springholm.org/


Response posted on 30th April 2020 by:
Christopher Wybrew

E: c.wybrew@btinternet.com
T:

Speed activated traffic lights

Since December 2017 Springholm village on the A75 (euroroute E18) has had two sets of speed activated traffic signals in an endeavour to control egregious speeding along the village main street (no parked vehicles or junctions/roundabouts requiring halts. On initial settings these signals were marvelous in taming speeds but the driver backlash resulted in the system authors (Transport Scotland) watering down the system to the great detriment of its efficacy in successfully halting speeders. The trigger speed was raised and the detection system was changed from radar to loops with a view to more precise control of signal changes in relation to triggering vehicle positions as radar tended to detect larger vehicles much earlier than small ones potentially halting complaint drivers ahead of speeding ones however even with inductive loops further detrimental changes were made by moving the exiting channel loops further back form the halt line. This means in total 600m exiting in each direction is now unprotected as is the length between the loops. Compensating speeding is a major problem but buy far the most disappointing element is the system authors resort to very late signal changes in response to triggering drivers. This late signal presentation results in a an abject systemic failure to halt the faster HGVs which when speeding at 40mph+ (same have been filmed with radar at 55mph going through the signal)s in the residential street pose a considerable threat in the event of run off collision into an adjacent frontage home as per the well Fairlie, Ayrshire tragedy. In my opinion these signals should be of the resting red variety only changing to green on a lawful speed approach. These signal have no legal status for enforcement and most time pressed professional drivers knowing that fact ignore the red signals. Under different operating parameters and with the backstop of camera enforcement such signals could be very good but as installed here they are mere window dressing giving thinly spread police a pretext not to patrol and traffic managers an excuse not to install hard engineered calming. in essence they are toothless advisory measures observed by inadvertent speeders but ignore by determined ones with nil prospect of any ensuing sanction.


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