Traffic came to a standstill on Monday morning as United Utilities started their final phase of the city’s sewer work.
Part of Lancaster’s one-way system closed with diversions causing chaos to many commuters.
Drivers faced long queues during the school-run and commute to work.
Commuters reacted to the news on social media.
@Davidgeorgeking tweeted: “My lad left for school at 7:15 am arrived at school 9:15 am not his usual 40 minute journey.
“Total lock-down from what I’ve heard! They closed the only road! What did they expect - flying cars and lorries?”
@mwainy tweeted: “ May as well just shut all roads in and around Lancaster and Morecambe until all works done #greatplanning.”
@DazzledSaz tweeted: “The bus my daughter gets to school was 45 minutes late and that was heading out of Lancaster!”
The city’s sewer system work is expected to last for at least two months.
The junction where North Road meets the A6 Rosemary Lane will be closed, and traffic heading into Lancaster from Morecambe and traffic along Caton Road will be diverted along Bulk Road and St Leonardgate.
Some bus services will be relocated from the bus station to Dalton Square and Common Garden Street.
There will be temporary timetable changes to allow extra time for diversions and congestion.
United Utilities explain that the teams are due to work 7am till 6pm Monday to Friday and weekend work is due to be done at this time also.
However they admit that some timings of the project will be reviewed.
Dawn Harrington, project manager, said: “We have been planning this work for a long time to make sure we can keep the impact to an absolute minimum.
“I would urge everyone from motorists, commuters, cyclists and pedestrians to pay extra attention during the changes and give themselves a bit more time.”
United Utilities say: “Pedestrians can still use the footpaths around our working area and all businesses are still open as usual, so please continue to support them.
“All diversions will be clearly sign posted to help direct you around our working areas.”
United Utilities say if commuters have any further questions about the work in Lancaster, to call 0345 672 3723, quoting project number 80022307.
More to follow...