Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 10 Jan 1990 | Hillingdon | 1 | 1 | Slight |
| Tue 16 Jan 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 17 Jan 1990 | Hillingdon | 2 | 2 | Slight |
| Thu 18 Jan 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 18 Jan 1990 | Hillingdon | 2 | 2 | Slight |
| Thu 18 Jan 1990 | Hillingdon | 2 | 2 | Slight |
| Fri 19 Jan 1990 | Hillingdon | 1 | 1 | Serious |
| Sat 20 Jan 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 21 Jan 1990 | Hillingdon | 2 | 1 | Serious |
| Sun 28 Jan 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 29 Jan 1990 | Hillingdon | 2 | 2 | Serious |
| Wed 31 Jan 1990 | Hillingdon | 2 | 2 | Slight |
| Thu 1 Feb 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 1 Feb 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 2 Feb 1990 | Hillingdon | 2 | 2 | Slight |
| Fri 9 Feb 1990 | Hillingdon | 2 | 3 | Serious |
| Fri 9 Feb 1990 | Hillingdon | 1 | 1 | Slight |
| Mon 12 Feb 1990 | Hillingdon | 2 | 1 | Serious |
| Thu 15 Feb 1990 | Hillingdon | 3 | 2 | Slight |
| Mon 19 Feb 1990 | Hillingdon | 1 | 1 | Slight |
| Wed 21 Feb 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 22 Feb 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 22 Feb 1990 | Hillingdon | 1 | 1 | Slight |
| Thu 22 Feb 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 9 Mar 1990 | Hillingdon | 2 | 2 | Slight |
| Sat 10 Mar 1990 | Hillingdon | 1 | 1 | Slight |
| Sat 10 Mar 1990 | Hillingdon | 1 | 1 | Serious |
| Mon 12 Mar 1990 | Hillingdon | 1 | 1 | Slight |
| Tue 13 Mar 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 19 Mar 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 21 Mar 1990 | Hillingdon | 1 | 1 | Slight |
| Sun 25 Mar 1990 | Hillingdon | 2 | 1 | Serious |
| Sun 25 Mar 1990 | Hillingdon | 2 | 1 | Serious |
| Mon 26 Mar 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 26 Mar 1990 | Hillingdon | 2 | 1 | Slight |
| Sat 31 Mar 1990 | Hillingdon | 1 | 1 | Slight |
| Mon 2 Apr 1990 | Hillingdon | 2 | 3 | Serious |
| Thu 5 Apr 1990 | Hillingdon | 1 | 2 | Serious |
| Thu 5 Apr 1990 | Hillingdon | 1 | 1 | Slight |
| Mon 9 Apr 1990 | Hillingdon | 3 | 2 | Slight |
| Sun 22 Apr 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 22 Apr 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 23 Apr 1990 | Hillingdon | 1 | 1 | Slight |
| Mon 23 Apr 1990 | Hillingdon | 1 | 1 | Slight |
| Fri 27 Apr 1990 | Hillingdon | 3 | 1 | Slight |
| Sat 28 Apr 1990 | Hillingdon | 1 | 1 | Slight |
| Wed 2 May 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 6 May 1990 | Hillingdon | 1 | 1 | Serious |
| Thu 10 May 1990 | Hillingdon | 1 | 2 | Serious |
| Wed 16 May 1990 | Hillingdon | 3 | 1 | Slight |
| Fri 18 May 1990 | Hillingdon | 1 | 1 | Slight |
| Sat 19 May 1990 | Hillingdon | 1 | 1 | Serious |
| Tue 22 May 1990 | Hillingdon | 1 | 1 | Slight |
| Wed 23 May 1990 | Hillingdon | 2 | 1 | Slight |
| Sat 26 May 1990 | Hillingdon | 1 | 1 | Slight |
| Fri 1 Jun 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 6 Jun 1990 | Hillingdon | 1 | 1 | Slight |
| Sun 10 Jun 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 13 Jun 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 14 Jun 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 15 Jun 1990 | Hillingdon | 1 | 1 | Slight |
| Thu 21 Jun 1990 | Hillingdon | 4 | 3 | Slight |
| Sat 23 Jun 1990 | Hillingdon | 1 | 1 | Slight |
| Sat 30 Jun 1990 | Hillingdon | 1 | 1 | Slight |
| Tue 3 Jul 1990 | Hillingdon | 5 | 1 | Serious |
| Tue 10 Jul 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 11 Jul 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 11 Jul 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 19 Jul 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 8 Aug 1990 | Hillingdon | 2 | 2 | Serious |
| Thu 16 Aug 1990 | Hillingdon | 2 | 2 | Serious |
| Thu 16 Aug 1990 | Hillingdon | 2 | 2 | Serious |
| Sat 18 Aug 1990 | Hillingdon | 1 | 1 | Serious |
| Thu 23 Aug 1990 | Hillingdon | 2 | 1 | Slight |
| Sat 1 Sep 1990 | Hillingdon | 3 | 1 | Slight |
| Sun 2 Sep 1990 | Hillingdon | 2 | 1 | Serious |
| Tue 4 Sep 1990 | Hillingdon | 2 | 3 | Serious |
| Wed 5 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 7 Sep 1990 | Hillingdon | 2 | 1 | Serious |
| Fri 7 Sep 1990 | Hillingdon | 2 | 1 | Serious |
| Mon 10 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 14 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 16 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Tue 18 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 24 Sep 1990 | Hillingdon | 2 | 3 | Slight |
| Tue 25 Sep 1990 | Hillingdon | 1 | 1 | Slight |
| Wed 26 Sep 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 1 Oct 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 3 Oct 1990 | Hillingdon | 1 | 1 | Serious |
| Thu 11 Oct 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 12 Oct 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 14 Oct 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 17 Oct 1990 | Hillingdon | 1 | 1 | Serious |
| Fri 19 Oct 1990 | Hillingdon | 3 | 1 | Slight |
| Mon 22 Oct 1990 | Hillingdon | 1 | 1 | Slight |
| Wed 24 Oct 1990 | Hillingdon | 1 | 1 | Slight |
| Thu 25 Oct 1990 | Hillingdon | 1 | 1 | Slight |
| Thu 25 Oct 1990 | Hillingdon | 1 | 1 | Slight |
| Sun 28 Oct 1990 | Hillingdon | 1 | 1 | Serious |
| Tue 6 Nov 1990 | Hillingdon | 3 | 1 | Slight |
| Tue 6 Nov 1990 | Hillingdon | 2 | 2 | Serious |
| Sat 10 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 11 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 14 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Wed 14 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 15 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 15 Nov 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 16 Nov 1990 | Hillingdon | 3 | 1 | Slight |
| Tue 27 Nov 1990 | Hillingdon | 1 | 1 | Slight |
| Tue 27 Nov 1990 | Hillingdon | 1 | 1 | Serious |
| Sat 1 Dec 1990 | Hillingdon | 1 | 1 | Fatal |
| Thu 6 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 20 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Thu 20 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 23 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Mon 24 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 28 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Fri 28 Dec 1990 | Hillingdon | 1 | 1 | Slight |
| Fri 28 Dec 1990 | Hillingdon | 1 | 1 | Slight |
| Sat 29 Dec 1990 | Hillingdon | 2 | 3 | Serious |
| Sat 29 Dec 1990 | Hillingdon | 2 | 3 | Serious |
| Sun 30 Dec 1990 | Hillingdon | 2 | 1 | Slight |
| Sun 30 Dec 1990 | Hillingdon | 2 | 1 | Slight |