Skip to content

Roadworks and lane closures

A1(M)

7 booked

Nothing is confirmed closed on the A1(M) right now. National Highways has 7 closures booked in the next 24 hours, the first due from 8pm, so it may already be in place. Its slowest recurring hour is Wed 16:00, averaging 14 mph.

Photo: derek dye, Geograph, CC BY-SA 2.0, resized

Closed right now

Closure data updated 35 minutes ago2026-10-22T00:38:06.184Z

None confirmed in force

Our last check saw nothing set up on the A1(M), but closures are booked for tonight below. This covers planned closures, not accidents.

Booked for today and tonight

Next 24 hours, UK time

UK time. Dark bar: the road is fully closed, so expect a diversion. Lighter bar: lanes or a slip road closed, the road stays open.

A1M Jct 63 to Jct 62 Southbound Lane 1 Closure (2)

Due now

A1(M) southbound between J63 and J62

What: 1 lane closed
Why: Construction work
When: 8pm yesterday to 6am today (UK time)
Start time has passed, so it may already be in place

A1M NB J49 entry slip closed

Booked

A1(M) J49 northbound access

Why: Road maintenance
When: 8pm tonight to 9am tomorrow (UK time)

A1M Jct 62 Northbound Entry Slip Road Lane 2 Closure

Booked

A1(M) northbound between J62 and J63

What: 1 lane of the slip road closed
Why: Maintenance work
When: 8pm tonight to 6am tomorrow (UK time)

A1M Jct 62 Northbound Exit Slip Road Lane 2 Closure

Booked

A1(M) J62 northbound exit

What: 1 lane of the slip road closed
Why: Maintenance work
When: 8pm tonight to 6am tomorrow (UK time)

A1M Jct 62 Southbound Entry Slip Road Lane 2 Closure

Booked

A1(M) southbound between J62 and J61

What: 1 lane of the slip road closed
Why: Maintenance work
When: 8pm tonight to 6am tomorrow (UK time)

A1M southbound Jct 8 to Jct 7 hard shoulder lane closure

Booked

A1(M) southbound between J8 and J7

What: 1 lane closed
Why: Tree and vegetation cutting
When: 9pm tonight to 5am tomorrow (UK time)

A1M southbound Jct 10 to Jct 9 hard shoulder lane closure

Booked

A1(M) southbound between J10 and J9

What: 1 lane closed
Why: Tree and vegetation cutting
When: 9pm tonight to 5am tomorrow (UK time)

These are closures National Highways has scheduled, mostly overnight. Plans can change on the night, and a closure only shows above as in force once our last check has seen it set up, so one that has passed its start time may already be in place.

Long-running roadworks on the A1(M)

Lasting a week or more, soonest to end first

A1M SB L1 closed between MP 89/4 and 88/7

paused

A1(M) southbound between J49 and J48

Due to end: 31 Oct 2026
Started: 28 Sept 2026
What: 1 lane closed, Maintenance work

End dates are National Highways’ own schedule and can move. Long-running roadworks on every road.

When the A1(M) is slowest

1 May 2026 to 15 June 2026

Wed 16:0014mph

61% slower than normal on this stretch · southbound · about 1,219 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Thu 16:0015mph

59% slower than normal on this stretch · southbound · about 1,166 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Thu 15:0015mph

59% slower than normal on this stretch · southbound · about 988 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Fri 16:0016mph

57% slower than normal on this stretch · southbound · about 1,152 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Tue 16:0016mph

56% slower than normal on this stretch · southbound · about 1,242 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Tue 07:0016mph

56% slower than normal on this stretch · southbound · about 1,283 vehicles an hour

Measured about 300 m from junction 1, Bignells Corner, in Hertsmere

Each hour is compared with that sensor’s own free-flow speed rather than the speed limit, because some sensors sit on bends and slip roads that never reach 70 mph. Quiet hours carrying under 600 vehicles are left out, so overnight roadworks are not mistaken for congestion.

Which direction is worse

Averaged along the whole road

NorthboundWorst at Fri 11:0050 mph

SouthboundWorst at Thu 16:0053 mph

Rush hour is rarely symmetrical. The commute in and the commute out peak at different times, and rarely as badly as each other. These speeds are averaged across every sensor facing that way, so they read higher than the worst-point figures above: most of the road is moving even when one junction is not.

Every hour of the week

Darker means slower

Average speed on the A1(M) for each hour of the week, shaded by how far below normal it runs.
Day	00	1	2	3	4	5	06	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Mon	Mon 00:00, 56 mph, 6% below normal	Mon 01:00, 56 mph, 7% below normal	Mon 02:00, 56 mph, 6% below normal	Mon 03:00, 56 mph, 7% below normal	Mon 04:00, 57 mph, 5% below normal	Mon 05:00, 58 mph, 2% below normal	Mon 06:00, 58 mph, 4% below normal	Mon 07:00, 55 mph, 10% below normal	Mon 08:00, 55 mph, 9% below normal	Mon 09:00, 56 mph, 8% below normal	Mon 10:00, 56 mph, 7% below normal	Mon 11:00, 55 mph, 10% below normal	Mon 12:00, 55 mph, 9% below normal	Mon 13:00, 55 mph, 9% below normal	Mon 14:00, 55 mph, 9% below normal	Mon 15:00, 56 mph, 8% below normal	Mon 16:00, 57 mph, 7% below normal	Mon 17:00, 58 mph, 4% below normal	Mon 18:00, 59 mph, 2% below normal	Mon 19:00, 60 mph, 1% below normal	Mon 20:00, 60 mph, 1% below normal	Mon 21:00, 59 mph, 2% below normal	Mon 22:00, 57 mph, 4% below normal	Mon 23:00, 56 mph, 6% below normal
Tue	Tue 00:00, 55 mph, 8% below normal	Tue 01:00, 55 mph, 9% below normal	Tue 02:00, 55 mph, 9% below normal	Tue 03:00, 55 mph, 9% below normal	Tue 04:00, 56 mph, 6% below normal	Tue 05:00, 58 mph, 4% below normal	Tue 06:00, 57 mph, 5% below normal	Tue 07:00, 53 mph, 13% below normal	Tue 08:00, 53 mph, 13% below normal	Tue 09:00, 55 mph, 9% below normal	Tue 10:00, 55 mph, 9% below normal	Tue 11:00, 55 mph, 9% below normal	Tue 12:00, 55 mph, 9% below normal	Tue 13:00, 55 mph, 10% below normal	Tue 14:00, 55 mph, 9% below normal	Tue 15:00, 55 mph, 9% below normal	Tue 16:00, 55 mph, 9% below normal	Tue 17:00, 56 mph, 8% below normal	Tue 18:00, 58 mph, 5% below normal	Tue 19:00, 59 mph, 2% below normal	Tue 20:00, 59 mph, 2% below normal	Tue 21:00, 57 mph, 4% below normal	Tue 22:00, 57 mph, 5% below normal	Tue 23:00, 55 mph, 8% below normal
Wed	Wed 00:00, 54 mph, 9% below normal	Wed 01:00, 54 mph, 10% below normal	Wed 02:00, 54 mph, 9% below normal	Wed 03:00, 55 mph, 9% below normal	Wed 04:00, 56 mph, 7% below normal	Wed 05:00, 58 mph, 4% below normal	Wed 06:00, 57 mph, 5% below normal	Wed 07:00, 54 mph, 11% below normal	Wed 08:00, 55 mph, 10% below normal	Wed 09:00, 56 mph, 8% below normal	Wed 10:00, 56 mph, 8% below normal	Wed 11:00, 55 mph, 9% below normal	Wed 12:00, 56 mph, 9% below normal	Wed 13:00, 56 mph, 8% below normal	Wed 14:00, 56 mph, 8% below normal	Wed 15:00, 55 mph, 9% below normal	Wed 16:00, 55 mph, 10% below normal	Wed 17:00, 56 mph, 8% below normal	Wed 18:00, 58 mph, 4% below normal	Wed 19:00, 59 mph, 1% below normal	Wed 20:00, 59 mph, 2% below normal	Wed 21:00, 58 mph, 4% below normal	Wed 22:00, 57 mph, 5% below normal	Wed 23:00, 56 mph, 7% below normal
Thu	Thu 00:00, 55 mph, 9% below normal	Thu 01:00, 54 mph, 10% below normal	Thu 02:00, 54 mph, 11% below normal	Thu 03:00, 54 mph, 10% below normal	Thu 04:00, 55 mph, 7% below normal	Thu 05:00, 57 mph, 5% below normal	Thu 06:00, 57 mph, 5% below normal	Thu 07:00, 55 mph, 11% below normal	Thu 08:00, 55 mph, 10% below normal	Thu 09:00, 55 mph, 9% below normal	Thu 10:00, 55 mph, 9% below normal	Thu 11:00, 55 mph, 9% below normal	Thu 12:00, 55 mph, 9% below normal	Thu 13:00, 55 mph, 10% below normal	Thu 14:00, 56 mph, 9% below normal	Thu 15:00, 55 mph, 10% below normal	Thu 16:00, 55 mph, 11% below normal	Thu 17:00, 57 mph, 6% below normal	Thu 18:00, 59 mph, 2% below normal	Thu 19:00, 60 mph, 1% below normal	Thu 20:00, 59 mph, 1% below normal	Thu 21:00, 58 mph, 3% below normal	Thu 22:00, 57 mph, 6% below normal	Thu 23:00, 56 mph, 6% below normal
Fri	Fri 00:00, 55 mph, 9% below normal	Fri 01:00, 54 mph, 9% below normal	Fri 02:00, 54 mph, 9% below normal	Fri 03:00, 55 mph, 9% below normal	Fri 04:00, 56 mph, 7% below normal	Fri 05:00, 57 mph, 4% below normal	Fri 06:00, 58 mph, 4% below normal	Fri 07:00, 57 mph, 7% below normal	Fri 08:00, 57 mph, 7% below normal	Fri 09:00, 56 mph, 8% below normal	Fri 10:00, 55 mph, 10% below normal	Fri 11:00, 52 mph, 14% below normal	Fri 12:00, 53 mph, 13% below normal	Fri 13:00, 54 mph, 11% below normal	Fri 14:00, 55 mph, 10% below normal	Fri 15:00, 56 mph, 9% below normal	Fri 16:00, 55 mph, 10% below normal	Fri 17:00, 56 mph, 7% below normal	Fri 18:00, 59 mph, 2% below normal	Fri 19:00, 60 mph, 1% below normal	Fri 20:00, 60 mph, 1% below normal	Fri 21:00, 59 mph, 3% below normal	Fri 22:00, 58 mph, 4% below normal	Fri 23:00, 57 mph, 5% below normal
Sat	Sat 00:00, 56 mph, 6% below normal	Sat 01:00, 55 mph, 8% below normal	Sat 02:00, 55 mph, 7% below normal	Sat 03:00, 56 mph, 7% below normal	Sat 04:00, 56 mph, 7% below normal	Sat 05:00, 58 mph, 3% below normal	Sat 06:00, 59 mph, 1% below normal	Sat 07:00, 60 mph, 0% below normal	Sat 08:00, 60 mph, 1% below normal	Sat 09:00, 58 mph, 3% below normal	Sat 10:00, 56 mph, 7% below normal	Sat 11:00, 55 mph, 9% below normal	Sat 12:00, 56 mph, 8% below normal	Sat 13:00, 58 mph, 6% below normal	Sat 14:00, 58 mph, 4% below normal	Sat 15:00, 59 mph, 2% below normal	Sat 16:00, 60 mph, 1% below normal	Sat 17:00, 60 mph, 1% below normal	Sat 18:00, 60 mph, 0% below normal	Sat 19:00, 60 mph, 0% below normal	Sat 20:00, 60 mph, 0% below normal	Sat 21:00, 59 mph, 1% below normal	Sat 22:00, 59 mph, 2% below normal	Sat 23:00, 58 mph, 3% below normal
Sun	Sun 00:00, 57 mph, 4% below normal	Sun 01:00, 57 mph, 5% below normal	Sun 02:00, 57 mph, 6% below normal	Sun 03:00, 56 mph, 6% below normal	Sun 04:00, 57 mph, 4% below normal	Sun 05:00, 59 mph, 2% below normal	Sun 06:00, 60 mph, 1% below normal	Sun 07:00, 60 mph, 0% below normal	Sun 08:00, 60 mph, 0% below normal	Sun 09:00, 60 mph, 1% below normal	Sun 10:00, 59 mph, 2% below normal	Sun 11:00, 58 mph, 4% below normal	Sun 12:00, 58 mph, 4% below normal	Sun 13:00, 58 mph, 4% below normal	Sun 14:00, 59 mph, 3% below normal	Sun 15:00, 59 mph, 2% below normal	Sun 16:00, 59 mph, 2% below normal	Sun 17:00, 59 mph, 2% below normal	Sun 18:00, 60 mph, 1% below normal	Sun 19:00, 61 mph, -1% below normal	Sun 20:00, 61 mph, -1% below normal	Sun 21:00, 59 mph, 1% below normal	Sun 22:00, 59 mph, 2% below normal	Sun 23:00, 57 mph, 4% below normal

FasterSlower

When is the best time to drive the A1(M)?

Roads that meet the A1(M)

Their roadworks and closures

Questions about the A1(M)

Is the A1(M) closed right now?

Nothing was confirmed closed at our last check of the National Highways feed (1:38am today, UK time), but 7 closures are booked in the next 24 hours, the first due from 8pm, so it may already be in place. This covers planned roadworks and lane closures, not accidents.

Is the A1(M) closed tonight?

National Highways has 7 closures booked on the A1(M) in the next 24 hours, the first due from 8pm, so it may already be in place: A1M Jct 63 to Jct 62 Southbound Lane 1 Closure (2); A1M NB J49 entry slip closed; and A1M Jct 62 Northbound Entry Slip Road Lane 2 Closure, plus 4 more. Plans can change on the night.

When will the roadworks on the A1(M) finish?

One long-running scheme is listed: A1M SB L1 closed between MP 89/4 and 88/7, due to end 31 Oct 2026. End dates are National Highways’ own schedule and can move.