Watford town centre is gridlocked after a set of traffic lights failed outside Tesco Extra.
Witnesses say it is impossible to leave the Waterfields retail park at the moment.
Emergency services are on scene redirecting traffic.
Giles Cooper, spokesman for Hertfordshire Constabulary, said: "We were called at 11.50am with reports that the traffic lights as you leave Tesco on Lower High Street have failed.
"Highways are aware and en route.
"Traffic is building up significantly. Officers are en route to assist with redirecting traffic at the moment."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereLast Updated:
Report this comment Cancel