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CrashStats

Diss road accidents: crash map and statistics

Police recorded 712 road traffic collisions in Diss, South Norfolk, from 1983 to 2025, and 839 people were killed or injured in them. Of those collisions, 6 were fatal and 139 were serious.

In 2025 police recorded 9 collisions, down from 13 in 2024.

Collisions since 1983
712
938th highest of 2,851 towns
Casualties
839
1.18 per collision
Fatal collisions
6
6 people killed
Serious collisions
139
143 seriously injured
Collisions in 2025
9
13 in 2024
Casualties in 2025
10
18 in 2024

Road collision statistics for Diss

Collisions by severity, 1983 to 2025

  • Fatal60.8%
  • Serious13920%
  • Slight56780%

What the data shows

  • Diss had 101 collisions from 2016 to 2025, 23% fewer than the 132 from 2006 to 2015.
  • 20% of collisions in Diss were fatal or serious, against 20% across Great Britain.
  • 107 children under 16 were killed or injured in Diss, 13% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 33% of collisions in Diss.

Where Diss ranks among 2,851 towns

Most collisions
938th
Most casualties
978th
Most fatal collisions
1,233rd
Most serious collisions
915th

Collisions by day of the week

  • Monday104 (15%)
  • Tuesday102 (14%)
  • Wednesday98 (14%)
  • Thursday111 (16%)
  • Friday127 (18%)
  • Saturday104 (15%)
  • Sunday66 (9.3%)

Light conditions

  • Daylight553 (78%)
  • Dark, street lights lit137 (19%)
  • Dark, no street lighting14 (2%)
  • Dark, lighting unknown7 (1%)
  • Dark, street lights unlit1 (0.1%)

Type of road

  • Single carriageway648 (91%)
  • One way street or slip road37 (5.2%)
  • Roundabout19 (2.7%)
  • Dual carriageway1 (0.1%)
  • Not recorded7 (1%)

Speed limit at the scene

  • 20 mph12 (1.7%)
  • 30 mph669 (94%)
  • 40 mph1 (0.1%)
  • 50 mph1 (0.1%)
  • 60 mph29 (4.1%)

Weather at the time

  • Fine, no high winds586 (82%)
  • Raining, no high winds76 (11%)
  • Fog or mist8 (1.1%)
  • Fine with high winds6 (0.8%)
  • Raining with high winds5 (0.7%)
  • Snowing, no high winds5 (0.7%)
  • Other20 (2.8%)
  • Not recorded6 (0.8%)

Who was hurt

  • Car occupant366 (44%)
  • Pedestrian195 (23%)
  • Motorcyclist128 (15%)
  • Cyclist126 (15%)
  • Van occupant11 (1.3%)
  • Other vehicle occupant4 (0.5%)
  • Bus or coach occupant3 (0.4%)
  • Goods vehicle occupant (over 3.5 tonnes)2 (0.2%)
  • Minibus occupant2 (0.2%)
  • Agricultural vehicle occupant1 (0.1%)
  • Not recorded1 (0.1%)

Source: Department for Transport, STATS19 road safety data

Diss road accidents by year

Collisions and casualties in Diss, 1983 to 2025

Collisions in Diss peaked at 32 in 1986; 2025 had 9.

  • Collisions
  • Collisions in 2025: 9
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025910
20241318
20231114
20221011
202177
202067
20191214
201867
2017918
20161818
20151216
20141117
20131111
20121212
20111819
20101112
20091012
20081316
20071719
20061719
20051316
20041618
20032226
20022225
20012026
20002124
19991213
19981722
19971416
19961318
19951213
19942730
19932124
19922737
19911720
19903132
19892228
19882730
19872632
19863236
19852936
19842121
19831719

Map of recent crashes in Diss

Map of the 24 most recent crashes in Diss

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 Diss

The 24 most recent collisions in Diss happened between 24 November 2023 and 13 October 2025.

Severity

Crashes by road in Diss

The A1066 has the most collisions in Diss, 351 of 712 (49%), followed by the B1132 (81).

Collisions in Diss on each road, 1983 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA1066351430471
2ndB11328189020
3rdB10774953014
4thA143223102

Council areas covering Diss

Collisions in Diss were recorded in 2 council areas. South Norfolk has 704 of 712 (99%).

Collisions in Diss by council area, 1983 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stSouth Norfolk7048306139
2ndMid Suffolk8900

Postcode district for Diss

All 712 collisions in Diss were in the IP22 postcode district.