A new speed limit has come into force on five major roads and motorways in Wales.
50mph limits will now affect parts of the M4, A470 and the A494 in an attempt to cut pollution.
The measures are part of a new £20m Air Quality Fund to reduce nitrogen dioxide (NO2) levels on roads where levels are currently above legal limits. The 50mph speed limits are expected to reduce emissions by up to 18%.
The speed limit will come in on the following roads:
- A494 at Deeside
- A483 at Wrexham
- M4 between Junctions 41 & 42 (Port Talbot)
- M4 between junctions 25 & 26 (Newport)
- A470 between Upper Boat & Pontypridd
The Environment Minister said the changes will be "for better health and well-being".