Traders in Port Talbot say they fear jobs and businesses will be hit hard if the Welsh Government goes ahead with plans to close two motorway junctions that serve the town.
Proposals have been made to close both junctions 40 and 41. The suggestion is being made to reduce bottlenecks and improve safety.
The stretch is one of the oldest pieces of motorway in Wales and it regularly sees long delays. But traders have launched a petition saying the plan would kill their businesses. Sarah Powell has been speaking to some of them.