Central Birmingham Birmingham has a Clean Air Zone which covers an area of the city centre inside the A4540 Middleway (but not the Middleway itself). It operates 24 hours a day, seven days a week, 365 days a year. Check before you travel. City centre public realm City centre movement and access strategy Dartmouth Middleway proposals Digbeth High Street public realm Digbeth active travel and streets Southside public realm Snow Hill public realm Paradise Circus multi-storey car park Public transport Midland Metro extensionHS2