Traffic has started to build up along the A38 into Birmingham city centre as the second day of tunnel repair works began.
The Queensway tunnels will be closed completely for six weeks as engineers upgrade the 40-year-old underpass system.
Motorists are advised to use the A4540 Ring Road as an alternative route.
Cameras from ITV News Central went inside the St Chad's and Queensway tunnels to see the work going on there.
The A38 St Chad's and Queensway tunnels through Birmingham are now closed - and will stay closed for six weeks until September 2nd.
The ITV News Central guide to alternative transport during the Birmingham A38 tunnel closures.