Part of the busy A421 is closed this afternoon following a crash involving a lorry and a car.
Motorists are being advised to avoid the westbound stretch between the A603 and the A6 junctions, which is currently completely closed to traffic.
A Bedfordshire Police spokesman said: “We were called at approximately 3.30pm to reports of a collision between a car and a lorry. It is believed the lorry has tipped over. The road is blocked westbound at A603 and A6 and is likely to remain closed for some time.”
It is not yet known what time the bypass is expected to reopen.