Trunk A-road

A414 traffic and collisions

The A414 is a trunk A-road of 62.5 miles, from Hertfordshire to Essex. This page covers its traffic at 31 DfT count points since 2000 and the collisions police recorded on it.

Last updated: 15 September 2026
Data source: Department for Transport
Records analysed: 31 count points in 2025
Methodology: View methodology

Traffic in 2025 595m vehicle miles
Average daily traffic 26,061 vehicles a day, both directions
Busiest section 53,503 7 to 8
HGV share 4.2% of vehicle miles
Traffic since 2019 −0.4% same count points
Collisions, 2021 to 2025 537 19.0 per 100m vehicle miles

How busy is the A414?

On an average day in 2025, 26,061 vehicles passed each point on the A414, counting both directions. The busiest section is 7 to 8 (Hertfordshire), with 53,503 a day; the quietest listed is A128 to A1114, with 11,607.

Busiest sections, 2025

7 to 8 carries 2.1 times the road’s average flow.

Sections of the A414 with the highest average daily flow, 2025
Section	Vehicles a day
7 to 8 Hertfordshire · 1.6 mi · HGVs 12.0%	53,503
M10 to A1081 Hertfordshire · 2.0 mi · HGVs 5.0%	52,671
A1081 to A1(M) Hertfordshire · 3.0 mi · HGVs 4.7%	45,719
A1169 to M11 Essex · 1.3 mi · HGVs 4.5%	40,760
A119 Cross Lane to A119 Ware Rd Hertfordshire · 0.7 mi · HGVs 4.0%	36,722
A119 to B1197 London Rd/John Tate Road roundabout Hertfordshire · 0.7 mi · HGVs 2.9%	35,460
A4147 to M1 Hertfordshire · 0.7 mi · HGVs 4.1%	35,187
A414 Roundabout with Green Lane (minor road) to M1 J8 Hertfordshire · 1.0 mi · HGVs 4.1%	35,187
A1025 to A1169 Essex · 0.6 mi · HGVs 4.2%	33,856
A4146 to A4147 Hertfordshire · 1.9 mi · HGVs 2.0%	33,504

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

Route

Hertfordshire to Essex · 62.5 miles

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

A414 traffic and collisions by section

30 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length.

Show all 30 sections Tap a column heading to sort

Sections of the A414 in route order, 2025 traffic
#
1	A41 to A4251Hertfordshire	0.5	28,588	2.2%	+7.2%	4	–
2	A4251 to A4146Hertfordshire	0.6	29,195	2.0%	+9.4%	8	–
3	A4146 to A4147Hertfordshire	1.9	33,504	2.0%	−2.6%	33	29.3
4	A4147 to M1Hertfordshire	0.7	35,187	4.1%	+0.6%	23	54.1
5	A414 Roundabout with Green Lane (minor road) to M1 J8Hertfordshire	1.0	35,187	4.1%	–	7	–
6	7 to 8Hertfordshire	1.6	53,503	12.0%	−5.3%	6	–
7	M1 Junction 7 to Roundabout A414, A5183 and A405Hertfordshire	2.9	26,840	6.6%	+6.0%	23	16.8
8	M10 to A1081Hertfordshire	2.0	52,671	5.0%	+0.5%	45	24.4
9	A1081 to A1(M)Hertfordshire	3.0	45,719	4.7%	−5.8%	36	15.2
10	A1M / A1001 / A6129 to A1000 (midpoint)Hertfordshire	1.4	31,529	3.6%	–	26	161.4
11	A1000 (midpoint) to A1000 Mill Green LaneHertfordshire	0.4	26,691	4.5%	−8.0%	fewer than 3	–
12	A1000 Mill Green Lane to B1455 Holwell LaneHertfordshire	2.1	28,179	4.2%	+1.8%	7	–
13	B1455 to Campfield Rd, HertfordHertfordshire	3.9	27,002	3.3%	–	13	33.8
14	Campfield Rd to A119Hertfordshire	0.2	29,972	3.3%	−1.0%	5	–
15	A119 Cross Lane to A119 Ware RdHertfordshire	0.7	36,722	4.0%	−0.8%	12	26.4
16	A119 to B1197 London Rd/John Tate Road roundaboutHertfordshire	0.7	35,460	2.9%	−6.0%	12	27.4
17	B1197 London Rd to A10Hertfordshire	1.4	31,946	3.0%	–	12	73.5
18	A1170 to Eastwick Road roundaboutHertfordshire	5.1	32,950	3.4%	−0.2%	22	7.4
19	Eastwick Road roundabout to A1169Hertfordshire, Essex	0.5	33,200	3.2%	+3.3%	9	–
20	A1169 to A1184Essex	1.9	23,113	2.8%	–	24	31.6
21	A1184 to B183 First Avenue Mandela AvenueEssex	0.7	22,724	6.0%	+15.2%	6	–
22	B183 First Avenue Mandela Avenue to N/A (roundabout)Essex	0.9	25,605	3.5%	−7.2%	13	32.1
23	N/A (roundabout) to A1025Essex	0.2	28,422	3.5%	−7.2%	6	–
24	A1025 to A1169Essex	0.6	33,856	4.2%	–	11	28.0
25	A1169 to M11Essex	1.3	40,760	4.5%	−17.1%	16	15.9
26	M11 to B181Essex	3.0	17,003	4.1%	+22.7%	8	–
27	B181 to A128Essex	3.1	15,178	3.5%	−0.7%	27	33.1
28	A128 to A1114Essex	9.4	11,607	3.0%	0.0%	45	23.8
29	A1114 to A12Essex	2.2	27,614	2.8%	+10.4%	14	12.9
30	A12(T) to B1018 The CausewayEssex	8.6	15,424	3.0%	–	62	42.4

Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A414 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.

A414 traffic by vehicle type

Cars and taxis make up 77.5% of the vehicle miles on the A414. HGVs account for 4.2%, rising to 12.0% on 7 to 8.

Vehicle mix, 2025

Share of vehicle miles on the A414 by vehicle type
Category	Share
Cars and taxis	77.5%
Vans (LGVs)	17.6%
HGVs	4.2%
Motorcycles	0.6%
Buses and coaches	0.2%

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 A414, by year
Year	HGV share
2000	5.3%
2001	5.3%
2002	6.0%
2003	6.3%
2004	6.3%
2005	5.7%
2006	5.7%
2007	5.6%
2008	5.0%
2009	4.9%
2010	5.0%
2011	4.8%
2012	4.9%
2013	5.0%
2014	4.9%
2015	5.0%
2016	5.2%
2017	5.2%
2018	5.2%
2019	5.0%
2020	5.6%
2021	5.5%
2022	4.9%
2023	4.5%
2024	4.3%
2025	4.2%

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

A414 traffic trend

Traffic on the A414 came to 595 million vehicle miles in 2025. At the count points present in both years, it is about the same as in 2019, before the pandemic, and up 3.3% on 2015.

Vehicle miles a year

Like for like, traffic is up 4.8% on 2000.

Vehicle miles on the A414 each year, the whole road as it was that year
Year	Vehicle miles
2000	468m
2001	488m
2002	491m
2003	478m
2004	497m
2005	479m
2006	477m
2007	483m
2008	481m
2009	473m
2010	456m
2011	476m
2012	476m
2013	480m
2014	525m
2015	539m
2016	542m
2017	563m
2018	576m
2019	580m
2020	452m
2021	516m
2022	563m
2023	576m
2024	573m
2025	595m

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

Average daily flow

Average daily flow along the A414, weighted by link length, by year
Year	Vehicles a day
2000	23,891
2001	24,895
2002	25,057
2003	24,383
2004	25,365
2005	24,453
2006	24,258
2007	24,525
2008	24,441
2009	23,886
2010	23,027
2011	23,514
2012	23,640
2013	23,805
2014	24,776
2015	25,410
2016	25,543
2017	25,832
2018	25,751
2019	26,107
2020	20,327
2021	23,144
2022	25,227
2023	25,621
2024	25,539
2025	26,061

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 (69.9% of today’s road for 2019). In 2025, 7 of the 31 count points were counted; DfT estimated the rest from earlier counts and local trends.

A414 collisions

Police recorded 537 collisions with the A414 as the first road from 2021 to 2025, 139 of them fatal or serious. That is 19.0 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 1.7 a year for each mile of road.

Reported collisions by year

Down 8.2% 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 A414, 2021 to 2025
Section	Per 100m vehicle miles
A1M / A1001 / A6129 to A1000 (midpoint) Hertfordshire · 26 collisions	161.4
B1197 London Rd to A10 Hertfordshire · 12 collisions	73.5
A4147 to M1 Hertfordshire · 23 collisions	54.1
A12(T) to B1018 The Causeway Essex · 62 collisions	42.4
B1455 to Campfield Rd, Hertford Hertfordshire · 13 collisions	33.8
B181 to A128 Essex · 27 collisions	33.1
B183 First Avenue Mandela Avenue to N/A (roundabout) Essex · 13 collisions	32.1
A1169 to A1184 Essex · 24 collisions	31.6

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

A further 86 collisions were recorded at junctions where the A414 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 A414

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

Hertfordshire
Essex

Planned closures on the A414 in England

National Highways has 11 planned closures on the A414 between 16 September 2026 and 30 September 2026, all of them starting in that period. 4 close a carriageway rather than a lane or slip road, and 11 start between 7pm and 6am.

Lane or slip A414 both directions Approaches to Park Street Roundabout - lane 2 closure

16 Sept 20:00 to 29 Sept 06:00 1 of 2 lanes Authority operation
Lane or slip A1(M) Northbound Jct 3 roundabout lane closure

16 Sept 22:00 to 17 Sept 05:30 1 of 3 lanes Road maintenance
Lane or slip A414 both directions Approaches to Park Street Roundabout - lane 2 closure

17 Sept 20:00 to 26 Sept 06:00 1 of 2 lanes Authority operation
Lane or slip A1(M) Northbound Jct 3 roundabout lane closure

17 Sept 22:00 to 18 Sept 05:30 1 of 3 lanes Road maintenance
Carriageway A414 southbound M1 Jct 8 exit slip road closure

18 Sept 22:00 to 19 Sept 05:00 Road maintenance
Lane or slip A414 eastbound approach to Park Street roundabout lane 1 closure

19 Sept 20:00 to 21 Sept 06:00 1 of 2 lanes Authority operation
Carriageway M1 southbound Jct 8 entry slip road closure

20 Sept 22:00 to 21 Sept 05:00 Road maintenance
Lane or slip A414 both directions Approaches to Park Street Roundabout - lane 2 closure

21 Sept 20:00 to 30 Sept 06:00 1 of 2 lanes Authority operation

3 more planned closures 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	31 count points in 2025	15 September 2026
Reported collisions	Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring	2021 to 2025	537 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 A414?

Route

A414 traffic and collisions by section

A414 traffic by vehicle type

A414 traffic trend

A414 collisions

Council areas on the A414

Roads that meet the A414

Planned closures on the A414 in England

Data sources and methodology

Related statistics