Motorists have been spotting double black cables stretched across roads in Swansea city centre and wondering what they're doing there.
Since Monday, the cables have appeared spanning roads around the city - including Carmarthen Road, Gower Road and Walter Road.
Swansea Council confirmed it was aware of the cables that were laid by GoSafe, a partnership between the four police forces and 22 local authorities in Wales and the Welsh Government, that aims to improve road safety.
If you get caught speeding, it's GoSafe you'll hear from.
The cables are part of an annual speed monitoring survey, but a spokesman from GoSafe reassured motorists they wouldn't be fined for any speeding recorded by the cables, or tubes as they are technically called.
What you can be fined for speeding:
"The tubes are typically left in place for 8-9 days and gather data on the traffic volume, average speeds, type of vehicle and number of vehicles per hour," said the spokesman.
" If average vehicle speeds have fallen to acceptable levels then we have to consider whether we need to continue enforcement at that location or use our resources at a more problematic site."
If you get caught by one of the 55 yellow speed cameras around Swansea , it's a different matter, however. Last year, £3.6m of speeding fines were handed out across Wales.
"We have had occasions where the tubes have been vandalised. This has often occurred due to the mistaken belief that these are ‘speed traps’.
"Whilst it is true that the tubes will measure the vehicle speed, they have no means to capture any details that would identify the vehicle such as a photograph showing a registration mark, so a speeding ticket cannot be issued.
"The tubes are usually placed at sites that GoSafe currently enforces, so if you do receive a speeding ticket it would have been generated from a nearby fixed camera or mobile camera van, NOT from the speed survey tubes," added the spokesman.
The cables will remain in place until the monitoring is completed on Friday, September 27.
