Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 13 Jan 1989 | Watford | 1 | 1 | Serious |
| Sat 28 Jan 1989 | Watford | 2 | 4 | Slight |
| Fri 10 Feb 1989 | Watford | 2 | 1 | Slight |
| Sat 11 Mar 1989 | Three Rivers | 2 | 3 | Slight |
| Sun 12 Mar 1989 | Three Rivers | 2 | 1 | Slight |
| Tue 11 Apr 1989 | Three Rivers | 3 | 1 | Slight |
| Tue 13 Jun 1989 | Three Rivers | 2 | 1 | Slight |
| Tue 11 Jul 1989 | Three Rivers | 3 | 2 | Slight |
| Fri 14 Jul 1989 | Watford | 2 | 1 | Serious |
| Sun 13 Aug 1989 | Three Rivers | 1 | 1 | Slight |
| Thu 14 Sep 1989 | Three Rivers | 2 | 1 | Serious |
| Mon 16 Oct 1989 | Three Rivers | 2 | 1 | Serious |
| Thu 19 Oct 1989 | Three Rivers | 2 | 1 | Slight |
| Thu 19 Oct 1989 | Three Rivers | 2 | 1 | Slight |
| Fri 27 Oct 1989 | Three Rivers | 3 | 2 | Serious |