Commuters, parents and school returners are being warned to plan ahead and expect disruption on Friday 1 and Monday 4 September as staff on Northern rail services hold two one-day strikes.
The strikes will run from 0001 to 2359 on each day.
Most Northern services are not expected to run and any that do operate, working to a revised timetable, will be extremely busy.
All public transport and Greater Manchester’s roads are expected to be busier, especially at peak morning and evening times, with key commuter routes forecast to face the most pressure as people affected by the strikes make alternative arrangements.
Monday 4 September is expected to be the most affected day as the majority of Greater Manchester schools return for the new academic year.
No rail services will operate between Manchester and Preston via Bolton as the line is currently closed due to a burst water main and a severely damaged bridge at Moses Gate.
This is also causing local road disruption and bus and route diversions are in place.