Installation work on the Reverse Speed Discrimination Signals started on Monday and will mean that Springholm, which has a 30mph limit, will be the first village to benefit from the use of signals in this way.
The project follows extensive consultation with the local community and is being carried out by Scotland TranServ, on behalf of Transport Scotland.
Vincent Tait, Scotland TranServ’s road safety manager said: “We’ve been working with the local community to reduce the speed profile, particularly of HGVs through the village, without significantly changing the profile of the A75.
“Two sets of traffic lights will be installed at the entry and exit to the village, linked to a speed monitoring device embedded in the road.
“Only if vehicles reduce their speed below a particular limit will the lights remain green. If they go over that threshold, then this will trigger the lights to red. The lights operate individually in each direction.”
The lights are expected to go live by the end of November and as part of the trial they will be continually monitored for the foreseeable future.
Labour MSP Colin Smyth said: “Any action to tackle concerns over speeding traffic in Springholm is welcome, but we need to see how these new measures are implemented in practice.”