The southbound carriageway of Reigate Hill has now reopened after being closed for just over two weeks for work on gas mains.
The road was closed south of Raglan Road to beyond the level crossing, with a diversion via Croydon Road.
The reopening is part of a second phase of the project, which also sees Rushworth Road now closed at its junction with the A217 (London Road).
Yorke Road was already closed, and remains so.
According to the one.network roadworks website, Yorke Road will remain shut until 26 February and Rushworth Road until 1 March.
Diversion routes are in place.
The work involves replacing old metal mains with new plastic pipe which has a minimum lifespan of 80 years.
A leaflet from gas company SGN says the firm agreed with Surrey County Council to carry out the work during lockdown to minimise disruption.