With the return of the ABP Southampton Marathon on Sunday, bus operator Bluestar has confirmed its temporary timetables and diversions for the coming weekend.
The event will see the full closure of Above Bar Street and dozens of other roads across the city.
Buses will not serve the Cenotaph or Art Gallery on both Saturday and Sunday, until 8pm after the marathon has finished.
Before 7.30am and between 1pm and 4pm on Sunday, the 1 and 2 will divert in both directions between Above Bar and The Avenue, not serving any stops between Cenotaph and Law Courts.
Between 7.30am and 1pm, 1 and 2 buses will start and finish at Debenhams and then divert in both directions to The Avenue, not serving stops between Hanover Buildings and Law Courts.
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Buses towards Southampton on the 3 will divert after Brintons Road to terminate at Debenhams on Sunday.
The 9.40am and 11am trips towards Eastleigh on Sunday will start at Debenhams and then divert to Hedge End via the M27 – not serving between Southampton and Moorhill Gardens.
The 4 route is only affected towards Romsey as buses will start at Castle Way before 1pm on Sunday.
Until 2pm Sunday on the 7, buses towards Sholing will go between Woolston Tollbooths and Sholing Estate only.
Buses towards Millbrook will start and finish at Castle Way and then divert via Asda to Central Station.
READ MORE: ABP Southampton Marathon 2025: Full list of road closures
The Bluestar 13, 14, 15 and 16 will not run to the city centre between 8am and 2pm on Sunday, and commuters will need to change at Bitterne onto the 3 or 18.
During the same time period, the 17 will split into two sections as Woolston to city centre will not be served during the closure of the Itchen Bridge.
Buses towards Weston will operate every 30 minutes Woolston Tollbooths and Weston Estate via Wrights Hill.
The 18 will also be split into two sections as buses towards Thornhill will start and finish at Debenhams, then divert non-stop via Mansbridge & Townhill Way to Bitterne Leisure Centre.
Stops in Northam and Bitterne Shops towards Thornhill will not be served.
The 19 and 19a will also be split into two sections between 8am and 2pm due to the closure of Itchen Bridge.
READ MORE: ABP Southampton Marathon 2025: All the race start times
Buses towards Thornhill will operate between Woolston Tollbooths and Fairfax Court every 30 minutes.
Passengers travelling from Thornhill into the city centre are strongly advised to use the Bluestar 18.
Between 8am and 3pm, there will be no service of the Bluestar 20 due to multiple closures at Cobden Bridge and Bitterne Park.
Passengers are advised to use the 16 as an alternative route.
The Quayconnect will also be disrupted between 8am and 1pm, as buses will divert via West Quay Road and not serve normal stops at Asda, West Quay, Holyrood Church and Telephone House.
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