If you are trying to get in and out of Milton Keynes from Bedford, there will be temporary closures in place on the M1 between Junctions 13 and 14 and on the A421 between Eagle Farm and Junction 13 due to major roadworks.
Thankfully, the closures won't be at the same time - but diversions will be in place and drivers are warned they may need to adjust their journey times.
The M1 northbound will be closed between the two junctions initially for one night, between 9pm on Monday, December 9 and 6am on Tuesday, December 10.
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But the following week, from Monday, December 16 there will be full closure, both north and southbound, for three consecutive nights. between Junctions 13 and 14.
The northbound closure will start at 9pm each evening and finish at 6am. The southbound carriageways will close an hour later, at 10pm, and re-open an hour earlier, at 5am.
The work is part of the M1 Smart motorway scheme and will involve installing overhead gantries.
Meanwhile, the A421 upgrading scheme will mean the road is closed for an entire weekend between Eagle Farm Roundabout up to the M1 Junction 13 near Magna Park.
The A421 will be fully closed between the Eagle Farm Roundabout up to M1 Junction 13 near Magna Park from 10pm on Thursday, December 12 and will open at 6am on Friday, December 13.
The road will also be closed from 9pm on Friday, December 13 and will open at 6am on Monday, December 16.
The closures are for work needed at Cranfield Road bridge.
For anyone not wanting to use the M1 when the A421 is closed, a diversion route along the A422 will be available instead.
There is a diversion route for drivers who would normally take the A421. This route avoids villages and goes via the A421 Bedford Western Bypass and then the A422 towards Milton Keynes.