There's fog and reduced visibility on the M4 between J49 A48 / A483 (Pont Abraham Roundabout) and J22 M49.
The fog's cleared on the M4 between J35 A473 (Pencoed) and J43 A465 (Llandarcy)
The fog's cleared on the A465 Heads Of The Valleys Road between A4060 / High Street (Dowlais Roundabout, Merthyr Tydfil) and A469 (Rhymney Interchange, Rhymney).
There's fog and reduced visibility on the A55 between J31 A5026 / A5151 / B5122 (Caerwys) and J33 A5119 Northop Road.
The Met Office has issued a yellow "Be Aware" warning for fog across Southeast Wales:
The public should be aware of the risk of poor driving conditions due to significantly reduced visibility.
There's patchy fog on the A55 in Flintshire and Conwy and on the M4 around Bridgend, Newport and the Severn Crossings
The fog's cleared on the M4 and M48.
There's patchy fog on the A55, the M4 and other routes, reducing visibility.