Drivers using the Perrots Road car park in Haverfordwest will only be able to exit via Swansquare from Friday, October 11.
Due to works as part of the new Public Transport Interchange, Pembrokeshire County Council has stated the exit from the car park that leads alongside the taxi rank to Cartlett Road will be closed until further notice.
The taxi rank will remain open with taxis accessing the rank via the bus station entrance.
Vehicles using Perrots Road car park will need to enter and exit the car park via Swansquare.