Motorists and users of the car park have complained of large pot holes and uneven surfaces over recent years throughout the car park.
"We can confirm that works to improve Gas Street car park and the junction with Gravel car park will begin on Monday 24 January," said a council spokesperson.
"The works will take approximately eight weeks, during which Gas Street car park will be closed, but Gravel car park will remain open.
"Whilst the work to the junction is taking place, there will be a one way system introduced which will be fully signposted."
The works will include:
Junction and carriageway leading to junction from car park to be modified and widened to allow easier access and egress from both directions.
Newly installed kerbs and edging around Gas street car park.
Gas street Car park to be resurfaced and re-lined, creating easier access and a safer car parking environment.
Installation of rain garden along boundary (river side). This will act as a surface water drainage soakaway but softened with subtle landscaping.
Installation of new boundary posts