Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 9 Jan 1989 | Dacorum | 1 | 1 | Fatal |
| Wed 11 Jan 1989 | Chiltern | 1 | 1 | Serious |
| Wed 18 Jan 1989 | Dacorum | 2 | 1 | Slight |
| Wed 18 Jan 1989 | Chiltern | 2 | 1 | Slight |
| Thu 26 Jan 1989 | Chiltern | 1 | 1 | Slight |
| Sat 4 Feb 1989 | Dacorum | 2 | 1 | Slight |
| Mon 6 Feb 1989 | Chiltern | 2 | 1 | Slight |
| Thu 9 Feb 1989 | Chiltern | 1 | 1 | Serious |
| Wed 15 Feb 1989 | Chiltern | 2 | 1 | Slight |
| Sat 25 Feb 1989 | Dacorum | 2 | 1 | Slight |
| Tue 14 Mar 1989 | Chiltern | 2 | 1 | Slight |
| Wed 15 Mar 1989 | Dacorum | 2 | 1 | Serious |
| Thu 16 Mar 1989 | Chiltern | 3 | 2 | Slight |
| Thu 16 Mar 1989 | Chiltern | 3 | 1 | Slight |
| Fri 17 Mar 1989 | Chiltern | 1 | 1 | Serious |
| Fri 17 Mar 1989 | Chiltern | 1 | 1 | Serious |
| Sat 25 Mar 1989 | Chiltern | 2 | 1 | Serious |
| Thu 30 Mar 1989 | Chiltern | 2 | 1 | Slight |
| Sat 22 Apr 1989 | Dacorum | 1 | 2 | Serious |
| Mon 24 Apr 1989 | Chiltern | 2 | 1 | Slight |
| Thu 27 Apr 1989 | Chiltern | 1 | 1 | Slight |
| Thu 27 Apr 1989 | Chiltern | 1 | 1 | Slight |
| Mon 1 May 1989 | Chiltern | 2 | 1 | Fatal |
| Thu 4 May 1989 | Chiltern | 1 | 1 | Serious |
| Thu 4 May 1989 | Chiltern | 1 | 1 | Serious |
| Fri 12 May 1989 | Chiltern | 1 | 1 | Slight |
| Tue 16 May 1989 | Chiltern | 3 | 1 | Slight |
| Thu 25 May 1989 | Chiltern | 2 | 1 | Serious |
| Thu 1 Jun 1989 | Chiltern | 1 | 1 | Slight |
| Thu 1 Jun 1989 | Chiltern | 1 | 1 | Slight |
| Fri 2 Jun 1989 | Chiltern | 2 | 3 | Slight |
| Sun 11 Jun 1989 | Chiltern | 2 | 1 | Slight |
| Fri 16 Jun 1989 | Chiltern | 2 | 2 | Serious |
| Mon 19 Jun 1989 | Chiltern | 2 | 1 | Serious |
| Mon 19 Jun 1989 | Chiltern | 2 | 1 | Serious |
| Tue 20 Jun 1989 | Chiltern | 2 | 1 | Slight |
| Mon 26 Jun 1989 | Chiltern | 1 | 3 | Serious |
| Sat 8 Jul 1989 | Chiltern | 3 | 1 | Slight |
| Wed 19 Jul 1989 | Chiltern | 3 | 2 | Slight |
| Wed 9 Aug 1989 | Chiltern | 1 | 1 | Serious |
| Fri 1 Sep 1989 | Chiltern | 2 | 1 | Slight |
| Sat 2 Sep 1989 | Chiltern | 1 | 1 | Slight |
| Sat 2 Sep 1989 | Chiltern | 2 | 1 | Serious |
| Tue 5 Sep 1989 | Chiltern | 2 | 1 | Slight |
| Tue 5 Sep 1989 | Chiltern | 2 | 1 | Slight |
| Mon 11 Sep 1989 | Chiltern | 2 | 1 | Slight |
| Mon 25 Sep 1989 | Chiltern | 4 | 2 | Serious |
| Sun 22 Oct 1989 | Chiltern | 2 | 2 | Slight |
| Sun 22 Oct 1989 | Chiltern | 2 | 2 | Slight |
| Fri 27 Oct 1989 | Chiltern | 1 | 1 | Fatal |
| Sat 28 Oct 1989 | Dacorum | 1 | 1 | Slight |
| Thu 2 Nov 1989 | Dacorum | 1 | 1 | Slight |
| Fri 3 Nov 1989 | Chiltern | 2 | 1 | Slight |
| Sat 4 Nov 1989 | Dacorum | 2 | 1 | Serious |
| Sat 25 Nov 1989 | Chiltern | 1 | 1 | Serious |
| Fri 1 Dec 1989 | Chiltern | 2 | 2 | Slight |
| Thu 7 Dec 1989 | Chiltern | 2 | 1 | Slight |
| Thu 14 Dec 1989 | Dacorum | 2 | 2 | Slight |
| Sat 16 Dec 1989 | Chiltern | 2 | 1 | Slight |
| Sat 16 Dec 1989 | Chiltern | 2 | 1 | Slight |
| Sat 23 Dec 1989 | Chiltern | 3 | 1 | Slight |
| Fri 29 Dec 1989 | Chiltern | 1 | 2 | Slight |