Motorway gantry sign
A gantry spanning the motorway with blue overhead signs indicating two lanes exiting and two continuing ahead, and the following text.
Left-hand two lanes destinations: (M50) CANOLBARTH LLOEGR; The MIDLANDS A449 Trefynwy; Monmouth A48 Casnewydd; Newport .
Right-hand two lanes destinations: London; Cas-gwent; Chepstow M4 .
Junction number: 24.
Three lanes widen out to four as we approach Coldra Interchange. The A449 heads north from here, another Welsh expressway that may as well be part of its motorway network. This is the main road from South Wales to the Midlands.