Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Tue 9 Jan 1990 | Uttlesford | 2 | 1 | Serious |
| Fri 12 Jan 1990 | East Hertfordshire | 2 | 1 | Serious |
| Wed 24 Jan 1990 | East Hertfordshire | 2 | 1 | Slight |
| Thu 25 Jan 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 2 Feb 1990 | East Hertfordshire | 5 | 1 | Slight |
| Sat 10 Feb 1990 | Harlow | 2 | 1 | Slight |
| Sun 11 Feb 1990 | East Hertfordshire | 2 | 1 | Slight |
| Mon 12 Feb 1990 | East Hertfordshire | 3 | 1 | Fatal |
| Tue 13 Feb 1990 | Harlow | 2 | 1 | Slight |
| Sat 17 Feb 1990 | East Hertfordshire | 2 | 4 | Slight |
| Tue 20 Feb 1990 | East Hertfordshire | 3 | 2 | Slight |
| Thu 22 Feb 1990 | East Hertfordshire | 1 | 1 | Serious |
| Sat 24 Feb 1990 | East Hertfordshire | 2 | 1 | Slight |
| Sun 25 Feb 1990 | East Hertfordshire | 2 | 2 | Slight |
| Sat 3 Mar 1990 | Harlow | 2 | 1 | Slight |
| Sat 10 Mar 1990 | East Hertfordshire | 2 | 2 | Slight |
| Fri 16 Mar 1990 | East Hertfordshire | 2 | 1 | Slight |
| Mon 19 Mar 1990 | East Hertfordshire | 2 | 1 | Slight |
| Tue 27 Mar 1990 | East Hertfordshire | 2 | 1 | Serious |
| Fri 30 Mar 1990 | East Hertfordshire | 2 | 1 | Serious |
| Tue 3 Apr 1990 | East Hertfordshire | 2 | 1 | Slight |
| Wed 4 Apr 1990 | East Hertfordshire | 2 | 1 | Serious |
| Sun 29 Apr 1990 | East Hertfordshire | 1 | 1 | Serious |
| Sun 29 Apr 1990 | East Hertfordshire | 1 | 1 | Slight |
| Mon 7 May 1990 | East Hertfordshire | 3 | 1 | Slight |
| Thu 10 May 1990 | East Hertfordshire | 2 | 1 | Slight |
| Thu 10 May 1990 | East Hertfordshire | 2 | 1 | Slight |
| Sat 12 May 1990 | East Hertfordshire | 1 | 1 | Slight |
| Fri 18 May 1990 | East Hertfordshire | 4 | 3 | Serious |
| Fri 18 May 1990 | East Hertfordshire | 2 | 1 | Slight |
| Thu 24 May 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 1 Jun 1990 | Harlow | 1 | 1 | Slight |
| Tue 5 Jun 1990 | East Hertfordshire | 1 | 1 | Serious |
| Fri 8 Jun 1990 | Harlow | 3 | 1 | Serious |
| Sat 9 Jun 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 15 Jun 1990 | East Hertfordshire | 2 | 1 | Slight |
| Sun 8 Jul 1990 | East Hertfordshire | 1 | 2 | Serious |
| Mon 16 Jul 1990 | East Hertfordshire | 1 | 1 | Slight |
| Wed 18 Jul 1990 | East Hertfordshire | 2 | 1 | Slight |
| Tue 14 Aug 1990 | Harlow | 3 | 3 | Fatal |
| Fri 17 Aug 1990 | East Hertfordshire | 2 | 2 | Slight |
| Thu 6 Sep 1990 | East Hertfordshire | 2 | 1 | Slight |
| Thu 6 Sep 1990 | Harlow | 2 | 1 | Slight |
| Sun 9 Sep 1990 | East Hertfordshire | 2 | 1 | Slight |
| Wed 26 Sep 1990 | East Hertfordshire | 3 | 1 | Slight |
| Sun 30 Sep 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 5 Oct 1990 | East Hertfordshire | 2 | 1 | Serious |
| Wed 10 Oct 1990 | East Hertfordshire | 1 | 1 | Slight |
| Fri 12 Oct 1990 | East Hertfordshire | 2 | 3 | Slight |
| Tue 16 Oct 1990 | East Hertfordshire | 3 | 1 | Serious |
| Wed 31 Oct 1990 | East Hertfordshire | 2 | 2 | Slight |
| Sat 10 Nov 1990 | East Hertfordshire | 1 | 2 | Serious |
| Mon 12 Nov 1990 | East Hertfordshire | 2 | 1 | Slight |
| Mon 12 Nov 1990 | East Hertfordshire | 2 | 1 | Slight |
| Tue 13 Nov 1990 | East Hertfordshire | 3 | 1 | Slight |
| Wed 14 Nov 1990 | East Hertfordshire | 3 | 1 | Slight |
| Fri 16 Nov 1990 | East Hertfordshire | 3 | 2 | Slight |
| Mon 19 Nov 1990 | East Hertfordshire | 3 | 1 | Slight |
| Sat 24 Nov 1990 | East Hertfordshire | 3 | 4 | Slight |
| Sat 24 Nov 1990 | East Hertfordshire | 3 | 2 | Slight |
| Mon 26 Nov 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 30 Nov 1990 | East Hertfordshire | 2 | 2 | Serious |
| Sun 2 Dec 1990 | East Hertfordshire | 2 | 1 | Slight |
| Fri 7 Dec 1990 | East Hertfordshire | 2 | 1 | Slight |
| Sun 23 Dec 1990 | Harlow | 1 | 1 | Serious |