A MAJOR road scheme to upgrade the A23 between London and Brighton starts on Sunday with overnight restrictions between Bolney and Pease Pottage.
The work sets the ball rolling on a £1.4 billion Government package of strategic road projects to boost the economy.
Work begins on Sunday on the widening of the A23 between Handcross and Warninglid.
The scheme is one of the 14 major road projects the Government announced would start construction before 2015, subject to statutory processes.
This is the first of those schemes to start work.
Before main civil engineering work can start, trees and other vegetation in the central reservation and verges along the A23 need to be removed.
The work will be carried out using a series of overnight restrictions on the A23 between Pease Pottage and Bolney over the next seven weeks.
Overnight lane restrictions will begin this Sunday and will be followed by a series of overnight carriageway closures in November, for which fully signed diversion routes will be in place.
The Highways Agency said the work has been carefully planned to minimise disruption for drivers and local people alike, with separate diversions in place for heavy vehicles, and is being carried out at night when traffic flows are lowest.
All restrictions will be removed outside working hours.
Environmental work which started in March, including the relocation of protected species, will continue until main civil engineering works on the improvement scheme begin next spring. The improved road is scheduled to open in 2014.