Major routes around Dundee city centre are approaching gridlock after roads closed for the 3D Festival.
Drivers are being advised to brace themselves for disruption as the V&A Dundee opening weekend gets into full swing.
A search operation was launched on the River Tay following a police incident at the Dundee waterfront on Wednesday.
Police warned motorists in Dundee to avoid Forfar Road on Tuesday morning.
Motorists have been asked to show patience as roads around Dundee city centre shut down for 12 days because of large-scale events in Slessor Gardens.
Motoring groups have welcomed a planned new service providing real-time roadworks information to help drivers avoid jams.
A "technical communication issue" affecting Dundee's traffic lights is said to be causing problems across the city.
Work will start in October to redesign a Mearns landmark following a public consultation.
Some sections of the A85 in and around Comrie will be closed overnight as resurfacing work begins.
Police have told St Johnstone and Dundee fans to stick to a specially drawn-up traffic plan ahead of the clash between the two sides.