Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 20 Jan 1990 | Three Rivers | 1 | 1 | Slight |
| Tue 10 Apr 1990 | Three Rivers | 2 | 1 | Slight |
| Mon 16 Apr 1990 | Watford | 2 | 2 | Slight |
| Thu 21 Jun 1990 | Three Rivers | 1 | 1 | Slight |
| Tue 14 Aug 1990 | Three Rivers | 1 | 2 | Serious |
| Mon 10 Sep 1990 | Three Rivers | 1 | 1 | Slight |
| Thu 4 Oct 1990 | Three Rivers | 2 | 1 | Slight |
| Thu 25 Oct 1990 | Three Rivers | 2 | 1 | Slight |
| Sat 17 Nov 1990 | Watford | 2 | 3 | Serious |
| Sun 25 Nov 1990 | Three Rivers | 2 | 1 | Slight |
| Mon 26 Nov 1990 | Three Rivers | 2 | 1 | Serious |
| Thu 6 Dec 1990 | Three Rivers | 2 | 1 | Serious |
| Fri 14 Dec 1990 | Three Rivers | 1 | 1 | Serious |
| Thu 20 Dec 1990 | Three Rivers | 2 | 3 | Slight |