Work to improve safety has begun on the A64 near Tadcaster this week.
The news comes after a series of accidents on the dual carriageway, including a woman who suffered multiple injuries and had to be airlifted to hospital after a serious crash in June.
Work will take place overnight until Friday October 5, between 9pm and 6am with diversions in place.
A Highways Agency project manager said: “This work will improve safety along this section of the A64 in North Yorkshire and reduce the need for further roadworks in this area.
“We are carrying out this work overnight when traffic flows are lower in order to minimise the disruption to road users.
“Safety is our top priority and for the safety of road users and road workers we encourage all drivers to drive carefully past the works and along the diversion routes, keeping within the speed limit, and concentrating on the road ahead.”
The work will be carried out in three phases - phase one westbound between Askham Bar and Askham Bryan until tomorrow; phase two from September 17 to 28, when the westbound entry slip road at Askham Bryan and the westbound exit slip road at Bilbrough Top will be closed overnight; phase three from October 1-6 with the westbound entry slip road at Bilbrough Top, the westbound exit slip road at Tadcaster Bar and the westbound exit slip road at Tadcaster Ings will be closed overnight.
Works cancelled by bad weather will take place on subsequent nights.