Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 2 Jan 1986 | St. Albans | 1 | 1 | Slight |
| Mon 6 Jan 1986 | Hertsmere | 1 | 2 | Slight |
| Tue 7 Jan 1986 | Hertsmere | 2 | 1 | Slight |
| Sun 19 Jan 1986 | St. Albans | 1 | 1 | Slight |
| Thu 23 Jan 1986 | St. Albans | 1 | 1 | Slight |
| Sun 26 Jan 1986 | St. Albans | 2 | 2 | Serious |
| Tue 28 Jan 1986 | St. Albans | 1 | 1 | Slight |
| Mon 3 Feb 1986 | Hertsmere | 1 | 1 | Serious |
| Wed 5 Feb 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 6 Feb 1986 | Hertsmere | 2 | 1 | Serious |
| Sun 9 Feb 1986 | St. Albans | 1 | 3 | Slight |
| Thu 13 Feb 1986 | St. Albans | 2 | 1 | Slight |
| Tue 18 Feb 1986 | St. Albans | 2 | 1 | Slight |
| Fri 21 Feb 1986 | Hertsmere | 2 | 1 | Slight |
| Tue 25 Feb 1986 | St. Albans | 2 | 1 | Slight |
| Sat 8 Mar 1986 | St. Albans | 1 | 1 | Slight |
| Wed 12 Mar 1986 | St. Albans | 1 | 1 | Serious |
| Tue 18 Mar 1986 | St. Albans | 1 | 1 | Slight |
| Thu 20 Mar 1986 | St. Albans | 2 | 1 | Slight |
| Tue 25 Mar 1986 | St. Albans | 2 | 1 | Slight |
| Thu 27 Mar 1986 | St. Albans | 2 | 1 | Slight |
| Tue 15 Apr 1986 | St. Albans | 1 | 1 | Serious |
| Thu 17 Apr 1986 | St. Albans | 2 | 1 | Slight |
| Fri 18 Apr 1986 | St. Albans | 2 | 1 | Slight |
| Sun 27 Apr 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 28 Apr 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 28 Apr 1986 | St. Albans | 3 | 1 | Slight |
| Mon 28 Apr 1986 | St. Albans | 2 | 2 | Slight |
| Wed 30 Apr 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 1 May 1986 | St. Albans | 3 | 1 | Slight |
| Fri 2 May 1986 | Hertsmere | 2 | 1 | Slight |
| Fri 2 May 1986 | Hertsmere | 1 | 1 | Serious |
| Sat 3 May 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 12 May 1986 | St. Albans | 2 | 1 | Slight |
| Mon 19 May 1986 | St. Albans | 2 | 1 | Slight |
| Thu 22 May 1986 | St. Albans | 2 | 1 | Slight |
| Fri 6 Jun 1986 | Hertsmere | 1 | 1 | Fatal |
| Fri 13 Jun 1986 | St. Albans | 3 | 1 | Slight |
| Sat 21 Jun 1986 | St. Albans | 2 | 1 | Serious |
| Wed 25 Jun 1986 | St. Albans | 2 | 1 | Slight |
| Mon 30 Jun 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 3 Jul 1986 | St. Albans | 2 | 1 | Slight |
| Fri 4 Jul 1986 | St. Albans | 1 | 3 | Slight |
| Thu 10 Jul 1986 | St. Albans | 1 | 1 | Slight |
| Wed 16 Jul 1986 | St. Albans | 4 | 1 | Slight |
| Thu 17 Jul 1986 | St. Albans | 1 | 1 | Slight |
| Sun 20 Jul 1986 | Hertsmere | 3 | 1 | Serious |
| Sun 27 Jul 1986 | St. Albans | 2 | 2 | Serious |
| Mon 28 Jul 1986 | Hertsmere | 2 | 1 | Serious |
| Mon 28 Jul 1986 | Hertsmere | 2 | 5 | Slight |
| Fri 1 Aug 1986 | Hertsmere | 2 | 1 | Slight |
| Tue 5 Aug 1986 | Hertsmere | 3 | 1 | Slight |
| Wed 13 Aug 1986 | St. Albans | 3 | 1 | Slight |
| Sat 16 Aug 1986 | St. Albans | 1 | 1 | Slight |
| Tue 26 Aug 1986 | St. Albans | 1 | 1 | Slight |
| Thu 28 Aug 1986 | St. Albans | 2 | 1 | Slight |
| Thu 11 Sep 1986 | St. Albans | 2 | 1 | Serious |
| Tue 16 Sep 1986 | Hertsmere | 1 | 1 | Slight |
| Fri 19 Sep 1986 | St. Albans | 2 | 1 | Slight |
| Fri 19 Sep 1986 | St. Albans | 2 | 1 | Serious |
| Thu 2 Oct 1986 | Hertsmere | 2 | 1 | Serious |
| Tue 7 Oct 1986 | St. Albans | 1 | 1 | Slight |
| Tue 14 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 15 Oct 1986 | St. Albans | 2 | 2 | Slight |
| Wed 15 Oct 1986 | St. Albans | 2 | 2 | Slight |
| Thu 16 Oct 1986 | St. Albans | 2 | 1 | Slight |
| Fri 17 Oct 1986 | St. Albans | 2 | 1 | Slight |
| Sun 19 Oct 1986 | St. Albans | 2 | 2 | Slight |
| Mon 27 Oct 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 27 Oct 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 27 Oct 1986 | St. Albans | 2 | 3 | Slight |
| Tue 28 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 29 Oct 1986 | St. Albans | 2 | 1 | Slight |
| Thu 30 Oct 1986 | Hertsmere | 1 | 1 | Slight |
| Thu 6 Nov 1986 | St. Albans | 1 | 1 | Slight |
| Thu 6 Nov 1986 | St. Albans | 2 | 2 | Slight |
| Sat 8 Nov 1986 | Hertsmere | 1 | 1 | Serious |
| Sun 9 Nov 1986 | St. Albans | 1 | 1 | Serious |
| Fri 14 Nov 1986 | St. Albans | 1 | 1 | Serious |
| Mon 17 Nov 1986 | Hertsmere | 2 | 1 | Serious |
| Fri 21 Nov 1986 | Hertsmere | 3 | 1 | Slight |
| Fri 28 Nov 1986 | Hertsmere | 2 | 1 | Slight |
| Mon 1 Dec 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 4 Dec 1986 | St. Albans | 2 | 1 | Slight |
| Sat 6 Dec 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 10 Dec 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 15 Dec 1986 | Hertsmere | 2 | 1 | Serious |
| Mon 15 Dec 1986 | Hertsmere | 1 | 1 | Slight |
| Fri 19 Dec 1986 | St. Albans | 1 | 1 | Slight |
| Mon 22 Dec 1986 | St. Albans | 2 | 1 | Fatal |