Motorists should consider staggering journey times, using public transport or cycling to avoid mounting traffic in Hull following coronavirus restrictions easing and recent highways works, the council has said.
A Hull City Council spokesperson said a combination of people travelling to work, reopened businesses and schools had impacted local roads.
The spokesperson added ongoing multi-million pound works to upgrade the city's roads had also caused disruption.
It follows reports of gridlocked traffic on key Hull roads including Main Road, Hedon Road, Freetown Way, Beverley Road and Spring Bank today (Tuesday, April 13).
To get the Hull Live headlines to your inbox, click here.
The queues come after pubs, restaurants and other venues opened outdoor areas to patrons and non-essential shops returned after coronavirus restrictions eased yesterday (Monday, April 12).
Recent updates to Hull's road network include new cycle lanes, and ongoing works at the Castle Street junction with the A63.
The council's spokesperson said: "As part of the next stage of easing lockdown restrictions to allow non-essential retail and outdoor food and drinks places to open, there are undoubtedly more people using the city’s roads.
"This combined with students returning to school and more people going back to work, will impact the road network.
Find the latest traffic updates in your area
"Hull is also in the midst of a huge transformation to its transport system and our focus is on how we can build a sustainable network that is fit for everyone, including cyclists, pedestrians and motorists.
"The majority of the multi-million pound road improvement schemes have been continuing during the lockdown period in order to minimise the impact on traffic as the lockdown restrictions begin to ease.
"However it is important to remember that we are improving roads that the public use to travel on. If these works don’t take place, then we will be operating a transport network that is not fit-for-purpose.
"Motorists are asked to stagger journey times and consider using the cycle lanes and public transport. Even if just five per cent of motorists choose a more sustainable form of transport, there would be a significant reduction in congestion levels."