A series of roadshow events are taking place over the next few weeks ahead of the closure of two tunnels on the A38 in Birmingham city centre.
The second phase of the 'Brumtunnels' project will see St Chad's and Queensway tunnels shut from 10pm on July 18 to 6am on September 1.
Ahead of the full closure, the tunnels will also be shut overnight for two weeks and a further four weeks of selected overnight closures.
This second phase will complete the upgrade by renewing the ventilation system, installing new security and communications systems, replacing electrical systems and refurbishing pumping stations and plant rooms.
The project by Amey to refurbish the thoroughfares follows a similar closure last summer which recently won a communication award from the Institution of Civil Engineers for the awareness raising campaign.
Representatives from Birmingham City Council and Amey will be at the events, along with staff from Centro, National Express, Virgin Trains, London Midland and sustainable transport groups promoting walking and cycling.
Those attending will also be able to take advantage of discounted offers on public transport tickets and receive information on routes, timetables and ways to avoid the disruption.
Last year's closures saw more than 200,000 additional journeys made by public transport.
Eddie Fellows, highways network manager for Amey, said: "It is important to stress that disruption was kept to a minimum last year because so many people heeded the advice to leave the car at home.
"If we do not get similar numbers of people making the change again this year, motorists may encounter significant delays."
The events take place on:
- June 17, Victoria Square
- June 19, Birmingham Children's Hospital
- June 20, Brindleyplace
- June 24, Cathedral Square, Colmore Row
- July 2, Centenary Square
- July 14, Victoria Square
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