One lane is closed and there's queueing traffic for six miles after an earlier accident and a broken down van on the A470 Southbound at the A4054 (Upper Boat Interchange)
There's congestion on the A470 to the A4059 (AberCynon Roundabout).
A summer-long campaign to reduce anti social behaviour and alcohol-fuelled disorder is being launched throughout Rhondda Cynon Taf.
Operation StreetWiZe is a multi-agency campaign and has been put together to combat prolific anti-social behaviour and alcohol-related crime and disorder.
Two teams will be made up of staff from the Community Safety Partnership Service, South Wales Police, South Wales Fire and Rescue and the Youth Offending Service and will patrol the borough throughout the summer.
Together they aim to reduce issues such as noise, underage drinking and criminal damage such as graffiti and vandalism.
RCT council says 'restorative justice approaches' will be taken with offenders writing letters of apology or litter picking to repair any harm done. Enforcement action will also be taken by way of fines, Anti Social Behaviour Referrals or in extreme cases, arrest.
Chair of the Community Safety Partnership Cllr Paul Cannon said "Operation StreetWiZe will be coming to an area near you over the summer school holiday period and we will be providing regular updates on the operation and its impact and success.”
The Bwlch and Maerdy Mountain Roads are closed because of snow.
Rhondda Cynon Taff Council is entering the latest phase of its anti metal theft campaign, after £80,000 worth has been stolen from school buildings, including at Tonypandy Primary School.
Children will now help use 'smart water' - which shows up under certain lights - to mark metals, making it easier to trace the materials if stolen.