The three cameras will be located as follows:

• The N8 between Saeul and Brouch;
• CR118 between Angelsberg and Mersch; and
• The end of the A4 motorway as it joins the Raemerich roundabout.

In what was a controversial measure for Luxembourg, the first 20 speed cameras were installed in two phases in 2016. A further six mobile speed cameras were issued to police and used last September.

“We believe road safety will be increased by using mobile cameras on stretches of road where we cannot install fixed cameras,” Dany Franck of the ministry of sustainable development and infrastructure told Delano.

During the first six months of the speed cameras use, 168,000 cars were flashed for speeding. “There are clear indications that speed has been reduced since we installed the first cameras,” said Franck. She cited figures that on the first day some 2,500 drivers were caught speeding by 10 cameras, whereas now the average is 500 infringements a day recorded by 20 cameras.

The cameras have been heavily criticized for their low margin of error. It means that motorists will be fined if they exceed the speed limit by more than 3 kilometres in an area where the limit is under 90k/h, by more than 5k/h in an area where the limit is 90, by more than 3k/h in an area where the limit is 110k/h and by more than 4k/h when the limit is 130.

With reporting by Duncan Roberts

This article has been amended. We originally stated that ten new cameras would be installed this year. That figure, taken from a usually reliable source, was wrong.