Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 3 Jan 1991 | East Hertfordshire | 2 | 1 | Slight |
| Thu 3 Jan 1991 | East Hertfordshire | 2 | 1 | Slight |
| Sat 12 Jan 1991 | East Hertfordshire | 2 | 1 | Serious |
| Sat 19 Jan 1991 | East Hertfordshire | 1 | 1 | Slight |
| Sun 27 Jan 1991 | Welwyn Hatfield | 2 | 3 | Serious |
| Fri 1 Feb 1991 | Welwyn Hatfield | 2 | 2 | Slight |
| Sat 23 Feb 1991 | East Hertfordshire | 1 | 1 | Slight |
| Sat 9 Mar 1991 | East Hertfordshire | 1 | 1 | Slight |
| Thu 4 Apr 1991 | East Hertfordshire | 1 | 1 | Slight |
| Fri 19 Apr 1991 | East Hertfordshire | 1 | 1 | Slight |
| Sat 11 May 1991 | East Hertfordshire | 2 | 1 | Slight |
| Mon 13 May 1991 | East Hertfordshire | 3 | 1 | Slight |
| Fri 31 May 1991 | East Hertfordshire | 2 | 2 | Serious |
| Fri 7 Jun 1991 | Welwyn Hatfield | 2 | 1 | Serious |
| Mon 17 Jun 1991 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 18 Jun 1991 | East Hertfordshire | 3 | 3 | Slight |
| Wed 26 Jun 1991 | East Hertfordshire | 2 | 2 | Fatal |
| Sun 25 Aug 1991 | East Hertfordshire | 2 | 1 | Serious |
| Thu 29 Aug 1991 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 5 Sep 1991 | East Hertfordshire | 2 | 1 | Slight |
| Mon 9 Sep 1991 | East Lindsey | 2 | 2 | Slight |
| Mon 16 Sep 1991 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 1 Oct 1991 | East Lindsey | 2 | 3 | Slight |
| Tue 5 Nov 1991 | East Hertfordshire | 1 | 1 | Slight |
| Fri 15 Nov 1991 | Lincoln | 2 | 1 | Slight |
| Sat 16 Nov 1991 | East Hertfordshire | 1 | 1 | Slight |
| Tue 24 Dec 1991 | East Hertfordshire | 2 | 1 | Slight |