UPDATED 5.15pm: The road has reopened and traffic is back to normal.
A main road is currently closed due to an accident.
The A64 westbound is closed due to an accident between the B1248 York Road and Musley Bank, which turns into Malton and Barnygate Lane, due to slow traffic.
The eastbound lane will remain open, but drivers are asked to avoid the area if possible.
It is not known if anyone was injured.
North Yorkshire Police say a detour is now in place.
A police spokesman said: “We are currently dealing with an RTC on the A64 going west and traffic going west is being diverted through Hutton’s ambo.
“The eastbound lane is still open, but please proceed carefully.
“Thanks for your patience.”