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CrashStats

NN4 road accidents: crash map and statistics

Police recorded 5,526 road traffic collisions in the NN4 postcode district, West Northamptonshire, from 1979 to 2025, and 7,653 people were killed or injured in them. Of those collisions, 122 were fatal and 1,182 were serious.

In 2025 police recorded 112 collisions, up 8% on 2024 (104).

Collisions since 1979
5,526
420th highest of 2,813 postcode districts
Casualties
7,653
1.38 per collision
Fatal collisions
122
138 people killed
Serious collisions
1,182
1,499 seriously injured
Collisions in 2025
112
Up 8% on 2024
Casualties in 2025
143
Up 4% on 2024

Road collision statistics for NN4

Collisions by severity, 1979 to 2025

  • Fatal1222.2%
  • Serious1,18221%
  • Slight4,22276%

What the data shows

  • NN4 had 774 collisions from 2016 to 2025, 19% fewer than the 956 from 2006 to 2015.
  • 24% of collisions in NN4 were fatal or serious, against 20% across Great Britain.
  • 742 children under 16 were killed or injured in NN4, 9.7% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 34% of collisions in NN4.

Where NN4 ranks among 2,813 postcode districts

Most collisions
420th
Most casualties
359th
Most fatal collisions
163rd
Most serious collisions
217th

Collisions by day of the week

  • Monday808 (15%)
  • Tuesday803 (15%)
  • Wednesday793 (14%)
  • Thursday834 (15%)
  • Friday937 (17%)
  • Saturday738 (13%)
  • Sunday613 (11%)

Light conditions

  • Daylight3,869 (70%)
  • Dark, street lights lit1,251 (23%)
  • Dark, no street lighting239 (4.3%)
  • Dark, lighting unknown126 (2.3%)
  • Dark, street lights unlit41 (0.7%)

Type of road

  • Single carriageway2,255 (41%)
  • Dual carriageway2,070 (37%)
  • Roundabout1,079 (20%)
  • One way street or slip road107 (1.9%)
  • Not recorded15 (0.3%)

Speed limit at the scene

  • 10 mph1 (under 0.1%)
  • 20 mph28 (0.5%)
  • 30 mph1,874 (34%)
  • 40 mph677 (12%)
  • 50 mph162 (2.9%)
  • 60 mph931 (17%)
  • 70 mph1,853 (34%)

Weather at the time

  • Fine, no high winds4,365 (79%)
  • Raining, no high winds780 (14%)
  • Fine with high winds83 (1.5%)
  • Fog or mist74 (1.3%)
  • Raining with high winds41 (0.7%)
  • Snowing, no high winds26 (0.5%)
  • Snowing with high winds5 (0.1%)
  • Other97 (1.8%)
  • Not recorded55 (1%)

Who was hurt

  • Car occupant5,184 (68%)
  • Motorcyclist797 (10%)
  • Pedestrian475 (6.2%)
  • Cyclist347 (4.5%)
  • Van occupant266 (3.5%)
  • Goods vehicle occupant (over 3.5 tonnes)249 (3.3%)
  • Minibus occupant161 (2.1%)
  • Bus or coach occupant91 (1.2%)
  • Taxi or private hire car occupant47 (0.6%)
  • Other vehicle occupant24 (0.3%)
  • Other3 (under 0.1%)
  • Not recorded9 (0.1%)

Source: Department for Transport, STATS19 road safety data

NN4 road accidents by year

Collisions and casualties in NN4, 1979 to 2025

Collisions in NN4 peaked at 180 in 1983; 2025 had 112.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025112143
2024104138
202388113
202296132
20215960
20206775
20196786
20184960
20175868
20167493
201595120
201488139
201389121
20126780
2011100127
201090126
200991119
2008106134
2007107137
2006123182
2005123169
2004147200
2003151203
2002134178
2001127158
2000146197
1999167213
1998154205
1997151218
1996145210
1995126168
1994126188
1993146205
1992129183
1991149218
1990172257
1989141221
1988151203
1987158206
1986133188
1985119187
1984125185
1983180270
1982136198
1981137233
1980102159
1979121180

Map of recent crashes in NN4

Map of the 24 most recent crashes in NN4

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in NN4

The 24 most recent collisions in NN4 happened between 24 October and 31 December 2025.

Severity

Crashes by road in NN4

The A45 has the most collisions in NN4, 1,138 of 5,526 (21%), followed by the M1 (1,030).

Collisions in NN4 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA451,1381,48614172
2ndM11,0301,80046264
3rdA5087761,06317198
4thA43310421871
5thA428304412963
6thA5123276340460
7thA5076167191422
8thB526105131220
9thA43453650214
10thA5095365529
11thA45004500

Council area for NN4

NN4 is in West Northamptonshire, where police recorded 53,355 collisions from 1979 to 2025. NN4 accounts for 10% of them.

Town in NN4

Of the 5,526 collisions in NN4, 2,514 (45%) were in Northampton.