Resurfacing work on Edward Benefer Way caused traffic chaos for people coming into and leaving Lynn town centre on Saturday.
The road was closed in both directions while surface dressing work was carried out during the weekend.
Angry drivers and passengers who were gridlocked in all directions took to Facebook to vent their frustrations.
After her three-mile journey took more than 35 minutes, Emma Chapman posted: “Whoever is thinking about coming into town DON’T. We left Reffley at 1.10pm and still not in town.”
Demi Britton added: “I was on the Fairstead bus and it took me 30 mins to get into town.”
Town centre manager Alistair Cox Tweeted: “Just to clarify, the roadworks that have brought King’s Lynn town centre to a halt today were the result of a decision by @NorfolkCC not me.”
A spokesperson from Norfolk County Council said: “We’re sorry people were delayed getting in and out of King’s Lynn at the weekend.
“We do understand how frustrating roadworks and road closures are and try our best to minimise disruption.
“In this case, we were resurfacing John Kennedy Road, which becomes Edward Benefer Way, as the existing road surface was at its end of its serviceable lifespan.
“Weekend days were chosen in order to avoid causing disruption to people going to work and school, and to the nearby port.”
The spokesperson added: “Signs were in place to make people aware of the road closure and divert people to use another route.
“We also informed local residents, businesses, bus operators and the borough council about the work months in advance and attended monthly town partnership meetings where this work was flagged up to all in attendance.
“However, when a main route into town is closed there will inevitably be a knock-on effect.”
Resurfacing work, which will continue overnight because of being in a residential area, is due to finish on Thursday morning.
Surface dressing work is also planned on the A17 near Clenchwarton, between 5am this coming Saturday and midday on the Sunday.
The work will extend from just east of the Station Road junction near Terrington St Clement to just east of the Station Road junction near Clenchwarton.
Significant delays and queuing traffic are expected in the area and temporary traffic lights will be in use, with one lane of the A17 remaining open.