Police have closed part of the B1000 in Welwyn Garden City during the early hours of this morning due to a collision (December 10).
Officers were forced to close part of the main stretch of Hertford Road in Tewin on Sunday and say it will remain shut for "some time".
Hertfordshire Police are advising motorists to "avoid the area" while investigations continue, urging drivers to "seek an alternative route".
Taking to X, formally Twitter, a constabulary spokesperson wrote: "We are currently at the scene of a collision on the B1000 Hertford Road in Tewin, Welwyn Garden City.
"The road has been closed to allow emergency services access, and is expected to remain closed for some time. Please avoid the area and seek an alternate route where possible."