Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 30 Jan 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 11 Feb 1989 | East Hertfordshire | 1 | 1 | Slight |
| Sat 25 Feb 1989 | Welwyn Hatfield | 2 | 3 | Serious |
| Mon 6 Mar 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 14 Mar 1989 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 14 Mar 1989 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 2 Apr 1989 | Welwyn Hatfield | 2 | 3 | Slight |
| Sat 15 Apr 1989 | Welwyn Hatfield | 1 | 1 | Slight |
| Thu 20 Apr 1989 | Welwyn Hatfield | 2 | 3 | Slight |
| Thu 4 May 1989 | Welwyn Hatfield | 1 | 1 | Slight |
| Thu 11 May 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 12 May 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 19 May 1989 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 6 Jun 1989 | Welwyn Hatfield | 3 | 1 | Serious |
| Tue 6 Jun 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 20 Jun 1989 | Welwyn Hatfield | 1 | 1 | Slight |
| Sat 1 Jul 1989 | Welwyn Hatfield | 2 | 2 | Slight |
| Sat 1 Jul 1989 | Welwyn Hatfield | 2 | 2 | Slight |
| Wed 19 Jul 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 30 Jul 1989 | East Hertfordshire | 2 | 1 | Serious |
| Thu 3 Aug 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 10 Aug 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 11 Aug 1989 | East Hertfordshire | 2 | 3 | Serious |
| Fri 22 Sep 1989 | Welwyn Hatfield | 2 | 3 | Slight |
| Wed 4 Oct 1989 | East Hertfordshire | 2 | 3 | Slight |
| Fri 6 Oct 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 21 Oct 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 10 Nov 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 17 Nov 1989 | East Hertfordshire | 3 | 3 | Slight |
| Sat 18 Nov 1989 | East Hertfordshire | 3 | 2 | Serious |
| Mon 27 Nov 1989 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 8 Dec 1989 | Welwyn Hatfield | 2 | 2 | Slight |
| Mon 11 Dec 1989 | Welwyn Hatfield | 2 | 1 | Serious |