Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 9 Jan 1987 | North Hertfordshire | 1 | 2 | Serious |
| Sat 10 Jan 1987 | Stevenage | 1 | 1 | Slight |
| Wed 28 Jan 1987 | Stevenage | 2 | 1 | Serious |
| Sat 7 Feb 1987 | East Hertfordshire | 1 | 1 | Fatal |
| Tue 17 Feb 1987 | East Hertfordshire | 1 | 2 | Slight |
| Tue 3 Mar 1987 | Stevenage | 2 | 1 | Slight |
| Wed 4 Mar 1987 | North Hertfordshire | 3 | 1 | Slight |
| Thu 5 Mar 1987 | Stevenage | 2 | 1 | Slight |
| Mon 9 Mar 1987 | Stevenage | 2 | 1 | Slight |
| Tue 10 Mar 1987 | North Hertfordshire | 2 | 1 | Slight |
| Tue 10 Mar 1987 | Stevenage | 1 | 1 | Serious |
| Wed 11 Mar 1987 | North Hertfordshire | 2 | 1 | Slight |
| Sat 14 Mar 1987 | North Hertfordshire | 2 | 1 | Slight |
| Wed 18 Mar 1987 | North Hertfordshire | 1 | 1 | Slight |
| Thu 19 Mar 1987 | Stevenage | 2 | 1 | Slight |
| Fri 20 Mar 1987 | Stevenage | 2 | 1 | Slight |
| Sun 22 Mar 1987 | North Hertfordshire | 2 | 1 | Slight |
| Thu 2 Apr 1987 | Stevenage | 1 | 1 | Serious |
| Sat 11 Apr 1987 | Stevenage | 1 | 2 | Serious |
| Wed 15 Apr 1987 | Stevenage | 2 | 1 | Slight |
| Fri 17 Apr 1987 | Stevenage | 2 | 1 | Slight |
| Wed 22 Apr 1987 | Stevenage | 2 | 1 | Slight |
| Thu 7 May 1987 | North Hertfordshire | 2 | 1 | Serious |
| Wed 13 May 1987 | Stevenage | 1 | 1 | Slight |
| Fri 15 May 1987 | Stevenage | 6 | 1 | Slight |
| Fri 15 May 1987 | Stevenage | 1 | 1 | Serious |
| Fri 22 May 1987 | North Hertfordshire | 2 | 1 | Slight |
| Wed 27 May 1987 | North Hertfordshire | 2 | 1 | Slight |
| Thu 4 Jun 1987 | Stevenage | 1 | 1 | Serious |
| Fri 5 Jun 1987 | Stevenage | 2 | 1 | Slight |
| Sun 7 Jun 1987 | North Hertfordshire | 2 | 1 | Serious |
| Sun 7 Jun 1987 | Stevenage | 1 | 1 | Slight |
| Wed 10 Jun 1987 | Stevenage | 1 | 1 | Slight |
| Wed 10 Jun 1987 | Stevenage | 1 | 1 | Slight |
| Sun 21 Jun 1987 | Rotherham | 2 | 1 | Serious |
| Tue 23 Jun 1987 | Stevenage | 1 | 1 | Serious |
| Sat 27 Jun 1987 | Stevenage | 1 | 1 | Slight |
| Tue 30 Jun 1987 | Stevenage | 1 | 1 | Slight |
| Mon 6 Jul 1987 | East Hertfordshire | 2 | 5 | Fatal |
| Wed 8 Jul 1987 | Stevenage | 3 | 1 | Slight |
| Sat 11 Jul 1987 | Rotherham | 1 | 1 | Slight |
| Sun 12 Jul 1987 | Stevenage | 2 | 3 | Slight |
| Mon 13 Jul 1987 | Stevenage | 1 | 1 | Slight |
| Tue 14 Jul 1987 | North Hertfordshire | 2 | 1 | Slight |
| Sat 25 Jul 1987 | Stevenage | 2 | 1 | Slight |
| Wed 29 Jul 1987 | Stevenage | 1 | 1 | Slight |
| Wed 29 Jul 1987 | North Hertfordshire | 2 | 1 | Serious |
| Thu 30 Jul 1987 | Stevenage | 2 | 1 | Serious |
| Thu 30 Jul 1987 | Stevenage | 1 | 3 | Slight |
| Sun 2 Aug 1987 | North Hertfordshire | 2 | 2 | Slight |
| Sun 2 Aug 1987 | Stevenage | 2 | 1 | Slight |
| Sun 2 Aug 1987 | Stevenage | 1 | 1 | Serious |
| Tue 4 Aug 1987 | Stevenage | 2 | 1 | Slight |
| Wed 5 Aug 1987 | Stevenage | 1 | 2 | Slight |
| Wed 12 Aug 1987 | Stevenage | 2 | 2 | Slight |
| Fri 14 Aug 1987 | Stevenage | 2 | 1 | Slight |
| Sat 22 Aug 1987 | North Hertfordshire | 4 | 2 | Slight |
| Fri 28 Aug 1987 | Stevenage | 2 | 1 | Serious |
| Sat 12 Sep 1987 | Stevenage | 2 | 1 | Slight |
| Sat 12 Sep 1987 | Stevenage | 3 | 1 | Slight |
| Mon 14 Sep 1987 | East Hertfordshire | 2 | 1 | Slight |
| Mon 14 Sep 1987 | East Hertfordshire | 2 | 1 | Slight |
| Tue 15 Sep 1987 | Stevenage | 1 | 1 | Serious |
| Tue 15 Sep 1987 | East Hertfordshire | 2 | 2 | Serious |
| Wed 16 Sep 1987 | East Hertfordshire | 2 | 1 | Serious |
| Thu 17 Sep 1987 | North Hertfordshire | 1 | 1 | Slight |
| Sat 19 Sep 1987 | East Hertfordshire | 1 | 1 | Slight |
| Mon 21 Sep 1987 | Stevenage | 2 | 1 | Slight |
| Sat 10 Oct 1987 | Stevenage | 2 | 1 | Slight |
| Mon 12 Oct 1987 | Stevenage | 1 | 1 | Slight |
| Wed 14 Oct 1987 | Stevenage | 2 | 1 | Slight |
| Fri 16 Oct 1987 | East Hertfordshire | 4 | 1 | Slight |
| Tue 27 Oct 1987 | Stevenage | 2 | 1 | Slight |
| Sat 31 Oct 1987 | Stevenage | 2 | 1 | Slight |
| Wed 4 Nov 1987 | Stevenage | 2 | 1 | Slight |
| Sat 7 Nov 1987 | North Hertfordshire | 2 | 1 | Slight |
| Sat 7 Nov 1987 | Stevenage | 1 | 2 | Slight |
| Wed 2 Dec 1987 | Stevenage | 1 | 1 | Slight |
| Thu 3 Dec 1987 | East Hertfordshire | 2 | 3 | Slight |
| Sat 5 Dec 1987 | Stevenage | 1 | 1 | Slight |
| Mon 7 Dec 1987 | Stevenage | 1 | 1 | Serious |
| Tue 8 Dec 1987 | North Hertfordshire | 2 | 2 | Serious |
| Thu 10 Dec 1987 | Stevenage | 2 | 1 | Slight |
| Mon 14 Dec 1987 | East Hertfordshire | 1 | 1 | Serious |
| Sat 19 Dec 1987 | North Hertfordshire | 1 | 1 | Serious |
| Sun 20 Dec 1987 | North Hertfordshire | 2 | 1 | Slight |
| Thu 24 Dec 1987 | East Hertfordshire | 1 | 2 | Slight |