Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 16 Feb 1991 | East Hertfordshire | 1 | 1 | Slight |
| Tue 9 Apr 1991 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 10 Apr 1991 | East Hertfordshire | 2 | 1 | Slight |
| Fri 2 Aug 1991 | East Hertfordshire | 1 | 1 | Slight |
| Mon 26 Aug 1991 | East Hertfordshire | 1 | 1 | Slight |
| Fri 27 Sep 1991 | Welwyn Hatfield | 2 | 2 | Slight |
| Fri 27 Sep 1991 | Welwyn Hatfield | 2 | 2 | Slight |
| Mon 30 Sep 1991 | East Hertfordshire | 2 | 1 | Slight |
| Tue 26 Nov 1991 | East Hertfordshire | 1 | 3 | Serious |
| Mon 16 Dec 1991 | Welwyn Hatfield | 3 | 2 | Slight |