Angry drivers are demanding to know why two major town centre road schemes have been allowed to take place at the same time.
Essex Highways is carrying out roadworks along the length of The Avenue, in addition to work at the junction of Hatfield Road and Spinks Lane.
Town centre businesses have reported disruption, while residents are having to put up with increased journey times.
Excavation work in The Avenue started last Monday and is due to end on May 17.
An Essex Highways spokesman said: "We appreciate local residents' patience whilst the works continue.
"The works in The Avenue were planned six months ago and due to the condition of the highway, they could not be postponed.”