Drivers faced new delays today on the southbound approach to Portsmouth city centre.
There are long tailbacks and shoppers head in to Gunwharf and Commercial Road to take advantage of the sales.
Police and officials from the Romanse traffic management centre both reported long queues on the M275 and in Mile End Road.
Some reports said that the M275 jam stretched back to the junction with the M27.
Portsmouth Police said in a tweet: ‘Very slow (almost standstill) heading into #Portsmouth via M275, please consider alternative routes #BusyBusy’
It comes after drivers complained that the park and ride priority lane in Mile End Road was causing huge delays for car drivers.
A video of traffic on Saturday showed vehicles in the slip road running next to Estella Road flats edging out into heavy traffic on Mile End Road in order to avoid the bus lane.
Portsmouth City Council said the queues were down to sheer weight of traffic. There had been no accidents and no roads were closed.
A spokesman said: ‘We are currently experiencing a very high volume of traffic to Gunwharf and into the city centre which is causing significant queuing coming into and within the city.
‘Motorists have been advised to use Park and Ride, overflow and city centre car parks.
‘All traffic systems have been checked and are operating correctly and there have been no reported traffic accidents.
‘The Portsmouth City Council traffic management team will continue to monitor the situation closely and are advising motorists using communication methods such as variable message signs and social media.’