Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 3 Mar 1989 | North Hertfordshire | 2 | 2 | Slight |
| Sun 5 Mar 1989 | North Hertfordshire | 2 | 1 | Slight |
| Thu 16 Mar 1989 | North Hertfordshire | 3 | 1 | Slight |
| Mon 20 Mar 1989 | North Hertfordshire | 2 | 1 | Serious |
| Mon 20 Mar 1989 | North Hertfordshire | 2 | 2 | Serious |
| Thu 6 Apr 1989 | North Hertfordshire | 2 | 1 | Slight |
| Sat 8 Apr 1989 | North Hertfordshire | 2 | 1 | Slight |
| Wed 19 Apr 1989 | North Hertfordshire | 2 | 1 | Slight |
| Fri 21 Apr 1989 | North Hertfordshire | 2 | 1 | Slight |
| Wed 31 May 1989 | North Hertfordshire | 3 | 1 | Slight |
| Fri 16 Jun 1989 | North Hertfordshire | 2 | 1 | Slight |
| Sat 17 Jun 1989 | North Hertfordshire | 2 | 1 | Slight |
| Tue 20 Jun 1989 | North Hertfordshire | 1 | 1 | Serious |
| Tue 27 Jun 1989 | North Hertfordshire | 2 | 1 | Slight |
| Fri 30 Jun 1989 | North Hertfordshire | 2 | 1 | Slight |
| Tue 18 Jul 1989 | North Hertfordshire | 2 | 1 | Slight |
| Sun 23 Jul 1989 | North Hertfordshire | 2 | 3 | Slight |
| Wed 26 Jul 1989 | North Hertfordshire | 1 | 1 | Slight |
| Sun 30 Jul 1989 | North Hertfordshire | 2 | 2 | Serious |
| Thu 10 Aug 1989 | North Hertfordshire | 2 | 1 | Serious |
| Wed 23 Aug 1989 | North Hertfordshire | 3 | 1 | Slight |
| Sat 9 Sep 1989 | North Hertfordshire | 2 | 1 | Slight |
| Wed 20 Sep 1989 | North Hertfordshire | 2 | 2 | Slight |
| Tue 26 Sep 1989 | North Hertfordshire | 2 | 1 | Slight |
| Tue 10 Oct 1989 | North Hertfordshire | 2 | 1 | Slight |
| Thu 2 Nov 1989 | North Hertfordshire | 3 | 1 | Slight |
| Wed 15 Nov 1989 | North Hertfordshire | 1 | 1 | Slight |
| Sat 9 Dec 1989 | North Hertfordshire | 2 | 2 | Serious |