The number 12 bus between Brighton and Eastbourne will operate again from about 1.45pm.
It will run as normal between Brighton and Denton Corner, and then via the A26 and A27.
The 12A will serve Seaford and terminate at Chyngton Estate.
Brighton and Hove Buses said it was still unable to get up and down the hill at East Dean.
Services 14 and 14C are about to resume their normal routes between Hangleton, Brighton, Peacehaven and Newhaven and should be operating normally by about 1.45pm.
The company said it was hopeful that services 28 and 29 would start running between Uckfield, Ringmer and Brighton shortly.