Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 10 Jan 1986 | Welwyn Hatfield | 2 | 4 | Serious |
| Tue 14 Jan 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 15 Feb 1986 | East Hertfordshire | 2 | 1 | Slight |
| Mon 21 Apr 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 17 May 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 8 Jun 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 21 Jun 1986 | Welwyn Hatfield | 1 | 1 | Slight |
| Sat 21 Jun 1986 | Welwyn Hatfield | 1 | 1 | Slight |
| Wed 16 Jul 1986 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 30 Sep 1986 | Welwyn Hatfield | 1 | 1 | Slight |
| Mon 6 Oct 1986 | East Hertfordshire | 1 | 2 | Slight |
| Tue 4 Nov 1986 | East Hertfordshire | 2 | 2 | Serious |