A ten-week lane closure has been put in place on the eastbound carriageway – prior to the junction with the A23 – and continues until the Hollingbury junction.
National Highways is responsible for the works, which are expected to finish on June 6.
An AA Traffic News notice on the morning of Thursday, April 24 reads: “Queueing traffic on A27 both ways at A23 London Road. In the construction area.
"Severe delays and delays increasing on A27 westbound between Station Approach (Falmer Station) and A23 London Road. Average speed ten mph.
"Severe delays and delays easing on A27 eastbound between A293 (Portslade / West Hove turn off) and Coldean Lane (Hollingbury / Ditchling junction). Average speed 15 mph.”
The lane closure is part of drainage and resurfacing work on the A27 – as well as the removal of the central reservation barrier.
A National Highways spokesperson told Sussex World on April 11: "After putting the temporary safety barriers in place we have now removed the central reservation barrier this week.
“The drainage improvement work on that area will then continue, day and night, over the coming weeks.”

1. A27 works
This photo was taken on the afternoon of Saturday, April 19 Photo: Eddie Mitchell

2. A27 lane closure
A lane closure has been put in place on the eastbound carriageway – prior to the junction with the A23 – and continues until the Hollingbury junction. Photo: Eddie Mitchell

3. A27 lane closure
A lane closure has been put in place on the eastbound carriageway – prior to the junction with the A23 – and continues until the Hollingbury junction. Photo: Eddie Mitchell

4. A27 lane closure
A lane closure has been put in place on the eastbound carriageway – prior to the junction with the A23 – and continues until the Hollingbury junction. Photo: Eddie Mitchell