THOUSANDS of runners are set to hit the streets of Cardiff this weekend, with bus routes to Barry and Penarth diverted due to road closures.

The Cardiff half marathon returns on Sunday, October 1, with the race starting outside Cardiff Castle with runners proceeding through the Penarth Marina before crossing the barrage.

Buses will divert and stop at different places throughout the city between 9am and 12.45pm due to road closures on Upper Westgate Street and Castle Street.

The main Cardiff bus route for Barry and Penarth through Penarth Road, Sloper Road, Leckwith Road and Wellington Street will also be closed.

Other road closures include North Road, King Edward VII, Museum Avenue, Kingsway, Duke Steet and Castle Street.

Cardiff Bus Routes 92, 94 and 95 to Barry and Penarth will divert via the Link Toad with stops between Virgil Street and Cogan Station unable to be served.

Route 95 will also divert via the Link Road with stops between the city centre and Leckwith Hill unable to be served.

All the 92, 94 and 95 routes will start and end at Wood Street, stop JA while the 96 will terminate at Canton on Cowbridge Road East near Wyndham Cresent and will be unable to access the city centre.

There will be a rolling road closure from 8:30 a.m. until 3:30 a.m. on the following Barry and Penarth routes

Cowbridge Road East, from the junction with Cathedral Road to the junction with Neville Street. 

Wellington Street, Leckwith Road, Sloper Road, Penarth Road, Cardiff Bay Barrage, Harbour Drive and Roald Dahl Plas. 

These roads will be open before 3:10 pm if the route is completed earlier, the race will start at 10 am, while the elite wheelchair race will begin at 9.50 am.