Trunk A-road

A55 traffic and collisions

The A55 is a trunk A-road of 89.3 miles in England and Wales, from West Cheshire to Isle of Anglesey. This page covers its traffic at 47 DfT count points since 2000 and the collisions police recorded on it.

Last updated: 15 September 2026
Data source: Department for Transport
Records analysed: 47 count points in 2025
Methodology: View methodology

Traffic in 2025 1.3bn vehicle miles
Average daily traffic 40,110 vehicles a day, both directions
Busiest section 66,739 A494 to A5119
HGV share 5.5% of vehicle miles
Traffic since 2019 +2.9% same count points
Collisions, 2021 to 2025 192 3.2 per 100m vehicle miles

How busy is the A55?

On an average day in 2025, 40,110 vehicles passed each point on the A55, counting both directions. The busiest section is A494 to A5119 (Flintshire), with 66,739 a day; the quietest listed is A5/A55 junction near pen-caledog to A55/A5153 junction, with 14,341.

Busiest sections, 2025

A494 to A5119 carries 1.7 times the road’s average flow.

Sections of the A55 with the highest average daily flow, 2025
Section	Vehicles a day
A494 to A5119 Flintshire · 3.3 mi · HGVs 5.3%	66,739
A41 to A483 West Cheshire · 3.2 mi · HGVs 6.0%	65,567
M53 to A51 West Cheshire · 1.1 mi · HGVs 6.6%	59,621
A547 Llanddulas to A470 / A547 Conwy · 4.2 mi · HGVs 4.1%	59,575
A5119 to A5026 Flintshire · 3.9 mi · HGVs 5.6%	58,457
A470T to A547 Conwy · 2.6 mi · HGVs 3.9%	57,126
A548 to A547 Llanddulas Conwy · 2.4 mi · HGVs 5.3%	55,987
A525E to A525W Denbighshire · 0.9 mi · HGVs 5.2%	51,918
A51 to A41 West Cheshire · 1.7 mi · HGVs 7.1%	51,132
A5026 to A5151 / A5026 Flintshire · 5.2 mi · HGVs 5.2%	49,198

Source:DfT,UK Motoring analysis 2000 to 2025 Updated 15 Sept 2026

Route

West Cheshire to Isle of Anglesey · 89.3 miles

Schematic route: each line joins the junctions at the ends of a DfT count point link.

A55 traffic and collisions by section

37 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 5 short link roads and spurs (1.6 miles) count in the road’s totals but are not listed.

Show all 37 sections Tap a column heading to sort

Sections of the A55 in route order, 2025 traffic
#
1	A56 to M53West Cheshire	0.2	11,924	6.6%	+0.6%	0	–
2	M53 to A51West Cheshire	1.1	59,621	6.6%	+0.6%	4	–
3	A51 to A41West Cheshire	1.7	51,132	7.1%	+1.9%	9	–
4	A41 to A483West Cheshire	3.2	65,567	6.0%	−1.1%	16	4.4
5	A483 to A55 splitWest Cheshire, Flintshire	2.3	41,976	5.2%	−14.0%	11	6.0
6	A55 slip to A5104Flintshire	1.7	31,316	5.7%	+2.5%	3	–
7	A5104 to A550Flintshire	1.4	36,505	4.7%	−6.3%	7	–
8	A550 to A494Flintshire	1.9	43,582	4.7%	+9.8%	3	–
9	A494 to A5119Flintshire	3.3	66,739	5.3%	+5.8%	14	3.8
10	A5119 to A5026Flintshire	3.9	58,457	5.6%	−7.2%	21	5.1
11	A5026 to A5151 / A5026Flintshire	5.2	49,198	5.2%	+5.9%	9	–
12	A5151 / A5026 to A525EFlintshire, Denbighshire	5.6	40,801	7.7%	−17.6%	8	–
13	A525E to A525WDenbighshire	0.9	51,918	5.2%	+25.2%	3	–
14	A525W to A547Denbighshire, Conwy	5.4	47,193	5.8%	+2.1%	7	–
15	A548 on-slip to A547 roundaboutConwy	0.7	44,468	5.6%	+1.7%	3	–
16	At A548Conwy	0.2	47,697	5.7%	+1.2%	0	–
17	A548 to A547 LlanddulasConwy	2.4	55,987	5.3%	+10.2%	8	–
18	A547 Llanddulas to A470 / A547Conwy	4.2	59,575	4.1%	+5.3%	3	–
19	A470T to A547Conwy	2.6	57,126	3.9%	+10.4%	9	–
20	A470 / A547 to A546Conwy	0.7	48,444	5.7%	+12.2%	5	–
21	A546 to A547Conwy	1.9	39,762	4.9%	+15.0%	3	–
22	A547 to A5 / A5122Conwy, Gwynedd	12.6	36,070	5.1%	+7.9%	21	2.9
23	A5 to A4087Gwynedd	2.2	38,663	4.8%	+11.6%	fewer than 3	–
24	A4087 to A487Gwynedd	0.7	36,592	4.4%	+2.6%	0	–
25	A487 to A5Gwynedd, Isle of Anglesey	1.2	36,432	5.2%	−4.5%	8	–
26	A4080 to A5025Isle of Anglesey	0.2	29,375	6.1%	−0.3%	0	–
27	A5025 to A5Isle of Anglesey	1.2	27,642	6.8%	+15.9%	fewer than 3	–
28	A5 to A5152Isle of Anglesey	1.9	25,606	7.6%	+13.2%	fewer than 3	–
29	A5152 to A5/A5114Isle of Anglesey	2.9	25,018	5.7%	+14.6%	0	–
30	A5/A5114 to A4080Isle of Anglesey	5.7	16,826	5.6%	+6.1%	3	–
31	A4080 to A5Isle of Anglesey	2.7	17,830	4.5%	+17.9%	fewer than 3	–
32	At A5Isle of Anglesey	1.6	17,429	6.5%	−3.0%	0	–
33	A5/A55 junction near pen-caledog to A55/A5153 junctionIsle of Anglesey	3.6	14,341	6.6%	+22.4%	4	–
34	A55/A5153 junction to Roundabout with A55/A5154Isle of Anglesey	0.4	10,954	5.3%	−5.5%	0	–
35	B4545 Kingsland Rd to A5154Isle of Anglesey	0.1	15,918	6.6%	+22.3%	0	–
36	A5154/A55 to A55/A5 JunctionIsle of Anglesey	0.1	9,653	6.5%	–	0	–
37	A55/A5 Junction to Rounabout near Ty Skinner / Skinner HouseIsle of Anglesey	0.1	6,320	13.3%	–	0	–

Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A55 as the first road, placed on the nearest section by their recorded position; rates (per 100 million vehicle miles) are shown for sections of half a mile or more with 10 or more.

A55 traffic by vehicle type

Cars and taxis make up 77.6% of the vehicle miles on the A55. HGVs account for 5.5%, rising to 7.7% on A5151 / A5026 to A525E.

Vehicle mix, 2025

Share of vehicle miles on the A55 by vehicle type
Category	Share
Cars and taxis	77.6%
Vans (LGVs)	16.2%
HGVs	5.5%
Motorcycles	0.4%
Buses and coaches	0.3%

Source:DfT,UK Motoring analysis 2000 to 2025 Updated 15 Sept 2026

HGV share of traffic

HGVs as a share of vehicle miles on the A55, by year
Year	HGV share
2000	7.7%
2001	7.5%
2002	7.3%
2003	7.5%
2004	7.7%
2005	7.4%
2006	6.9%
2007	7.4%
2008	7.4%
2009	6.8%
2010	7.0%
2011	6.4%
2012	6.0%
2013	5.9%
2014	6.0%
2015	6.2%
2016	6.1%
2017	5.8%
2018	5.9%
2019	5.9%
2020	8.2%
2021	7.6%
2022	5.9%
2023	5.7%
2024	5.6%
2025	5.5%

Source:DfT,UK Motoring analysis 2000 to 2025 Updated 15 Sept 2026

A55 traffic trend

Traffic on the A55 came to 1.31 billion vehicle miles in 2025. At the count points present in both years, it is up 2.9% on 2019, before the pandemic, and up 22.5% on 2015.

Vehicle miles a year

Like for like, traffic is up 41.7% on 2000.

Vehicle miles on the A55 each year, the whole road as it was that year
Year	Vehicle miles
2000	818m
2001	926m
2002	964m
2003	969m
2004	993m
2005	994m
2006	1.1bn
2007	1.1bn
2008	1.1bn
2009	1.1bn
2010	1.0bn
2011	1.0bn
2012	995m
2013	1.0bn
2014	1.1bn
2015	1.1bn
2016	1.2bn
2017	1.2bn
2018	1.3bn
2019	1.3bn
2020	842m
2021	1.0bn
2022	1.2bn
2023	1.2bn
2024	1.3bn
2025	1.3bn

Source:DfT,UK Motoring analysis 2000 to 2025 Updated 15 Sept 2026

Average daily flow

Average daily flow along the A55, weighted by link length, by year
Year	Vehicles a day
2000	32,923
2001	28,685
2002	29,881
2003	30,020
2004	30,779
2005	30,817
2006	33,098
2007	32,786
2008	33,475
2009	33,546
2010	32,414
2011	31,088
2012	30,722
2013	32,084
2014	32,454
2015	32,919
2016	35,608
2017	38,437
2018	38,819
2019	38,957
2020	25,821
2021	31,656
2022	37,459
2023	38,197
2024	39,268
2025	40,110

Source:DfT,UK Motoring analysis 2000 to 2025 Updated 15 Sept 2026

The chart counts the whole road as it was each year, so new or renumbered stretches move it. The percentage changes compare only count points present in both years. In 2025, 9 of the 47 count points were counted; DfT estimated the rest from earlier counts and local trends.

A55 collisions

Police recorded 192 collisions with the A55 as the first road from 2021 to 2025, 88 of them fatal or serious, including 12 fatal. That is 3.2 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.4 a year for each mile of road.

Reported collisions by year

Up 8.1% from 2021 to 2025.

Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated 15 Sept 2026

Sections with the highest collision rates

Per 100 million vehicle miles, 2021 to 2025. Sections of half a mile or more with 10 or more collisions.

Collisions per 100 million vehicle miles by section of the A55, 2021 to 2025
Section	Per 100m vehicle miles
A483 to A55 split West Cheshire, Flintshire · 11 collisions	6.0
A5119 to A5026 Flintshire · 21 collisions	5.1
A41 to A483 West Cheshire · 16 collisions	4.4
A494 to A5119 Flintshire · 14 collisions	3.8
A547 to A5 / A5122 Conwy, Gwynedd · 21 collisions	2.9

Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated 15 Sept 2026

A further 48 collisions were recorded at junctions where the A55 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. How we count collisions

Council areas on the A55

In route order. Each is the highway authority DfT files the count points under.

West Cheshire
Flintshire
Denbighshire
Conwy
Gwynedd
Isle of Anglesey

Planned closures on the A55 in England

National Highways has 9 planned closures on the A55 between 16 September 2026 and 30 September 2026, all of them starting in that period. 7 close a carriageway rather than a lane or slip road, and 9 start between 7pm and 6am.

Carriageway A55 Southbound Jct 38 exit slip road closure

16 Sept 21:00 to 19 Sept 06:00 Road maintenance
Carriageway A55 Southbound Jct 38 exit slip road closure

16 Sept 21:00 to 18 Sept 06:00 Road maintenance
Carriageway A55 Southbound Jct 40 entry slip road closure

17 Sept 21:00 to 19 Sept 06:00 Road maintenance
Carriageway A55 westbound jct 39 entry slip road closure

21 Sept 21:00 to 30 Sept 05:00 Authority operation
Carriageway A55 westbound jct 39 entry slip road closure

21 Sept 21:00 to 26 Sept 05:00 Authority operation
Carriageway A55 westbound jct 39 entry slip road closure

22 Sept 21:00 to 26 Sept 05:00 Authority operation
Lane or slip A55 eastbound lane 1 closure (MP 136/5 to 137/3)

22 Sept 21:00 to 24 Sept 05:00 Authority operation
Lane or slip A55 Eastbound lane 2 closure (MP 138/2 to 139/3)

26 Sept 21:00 to 28 Sept 06:00 Road maintenance Also affects M53

1 more planned closure in this period are not shown.

Planned closures only: National Highways can cancel or change them, and closures caused by incidents are not shown. Council roads in England are not covered. Roadworks and closures across the UK

Source:National Highways 2026-09-16 to 2026-09-30 Updated 16 Sept 2026

Data sources and methodology

Datasets used on this page
Figures	Source	Period	Records	Updated
Traffic counts and vehicle mix	Road traffic statistics (AADF by count point) Department for Transport Derived statistics UK Motoring	2000 to 2025	47 count points in 2025	15 September 2026
Reported collisions	Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring	2021 to 2025	192 reported collisions	15 September 2026
Planned closures	Transport Data Feeds (DATEX II) National Highways	2026-09-16 to 2026-09-30	2,304 planned closure schemes	16 September 2026

Annual average daily flow (AADF) is the average number of vehicles passing a point on a typical day of the year, both directions combined.
Vehicle miles are AADF multiplied by link length and 365, summed over every count point link on the road.
Sections join count point links between junctions, using the link lines in DfT’s major road database.
STATS19 covers personal injury collisions reported to the police. Damage-only collisions are not included, and not every injury collision is reported.
Serious and slight figures are DfT’s adjusted estimates, which allow for police forces moving to injury-based reporting.
Counts of one or two collisions below Great Britain level are shown as “fewer than 3”.

How we calculate these figures All data sources

Contains public sector information licensed under the Open Government Licence v3.0.

How busy is the A55?

Route

A55 traffic and collisions by section

A55 traffic by vehicle type

A55 traffic trend

A55 collisions

Council areas on the A55

Roads that meet the A55

Planned closures on the A55 in England

Data sources and methodology

Related statistics