The A48 is closed in both directions after an accident between Llanddarog and the Cross Hands Roundabout.
Traffic is building at a major route in Cardiff which has been closed because of a police 'incident'.
It is expected traffic on the Gabalfa Roundabout will increase dramatically during the peak of the rush hour.
The A48 Western Avenue Eastbound is closed because of a police incident at the Gabalfa Interchange. Traffic is being diverted around the roundabout and back onto the A48 again. Police say the carriageway could be shut for some time.
There is queueing traffic because of traffic light failure on the A48 around the M4 at J24 (Coldra). It's also affecting the A449 Southbound at J24.
One lane is blocked and there is heavy traffic because of a broken down car on the A48 Eastern Avenue Westbound near the University Hospital of Wales. There is congestion to Southern Way (Llanedeyrn Interchange).
The A48 Eastbound is closed and there's heavy traffic after an accident and recovery work between Pound Hill and Blacksmiths Way. Police are directing traffic.
The A48 is partially blocked and there's queueing traffic because of an overturned lorry and spillage of diesel and hydraulic oil at the B4487 Newport Road / Cypress Drive (St Mellons Roundabout). It's on the roundabout.
The A48 Cowbridge By-Pass is closed and there's slow traffic because of an overturned car and recovery work between the A4222 Gibbet's Hill and the A4222 Primrose Hill. Police are directing traffic.
The A48 Heilbronn Way into town is blocked and there's queueing traffic after an accident between the B4286 Water Street and Oakwood Road.
One lane is blocked and there's queueing traffic after an accident on the A48 Western Avenue Westbound between Excelsior Road and the A4119 Cardiff Road / Palace Road.