On Monday, 19 February, gas network upgrades begin involving work between Horsham's Worthing Road's junction with Blackbridge Lane and the roundabout junction with Albion Way.
To ensure everyone's safety, the Worthing Road will be closed in sections as work progresses between these junctions.
Motorists will also be unable to enter or exit the Blackbridge Lane junction during work on the section near this junction.
Signed diversions will be in place for affected motorists where roads are closed. Access will be maintained for residents and businesses.
The work is expected to last approximately 13 weeks.