Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 11 Jan 1988 | Watford | 3 | 1 | Serious |
| Mon 11 Jan 1988 | Barnet | 2 | 1 | Slight |
| Wed 13 Jan 1988 | Hertsmere | 2 | 1 | Slight |
| Fri 15 Jan 1988 | Hertsmere | 1 | 1 | Slight |
| Fri 15 Jan 1988 | Barnet | 1 | 1 | Slight |
| Mon 18 Jan 1988 | Barnet | 1 | 1 | Serious |
| Wed 20 Jan 1988 | Barnet | 1 | 1 | Slight |
| Tue 26 Jan 1988 | Barnet | 2 | 2 | Slight |
| Tue 26 Jan 1988 | Hertsmere | 1 | 2 | Slight |
| Thu 28 Jan 1988 | Barnet | 2 | 1 | Slight |
| Wed 3 Feb 1988 | Watford | 2 | 1 | Slight |
| Thu 4 Feb 1988 | Watford | 2 | 2 | Slight |
| Thu 4 Feb 1988 | Hertsmere | 1 | 1 | Serious |
| Mon 8 Feb 1988 | Watford | 1 | 1 | Slight |
| Wed 10 Feb 1988 | Watford | 2 | 1 | Slight |
| Fri 12 Feb 1988 | Hertsmere | 1 | 1 | Slight |
| Sat 13 Feb 1988 | Watford | 2 | 2 | Serious |
| Thu 18 Feb 1988 | Barnet | 2 | 1 | Slight |
| Fri 19 Feb 1988 | Watford | 1 | 2 | Serious |
| Fri 19 Feb 1988 | Watford | 1 | 2 | Serious |
| Wed 24 Feb 1988 | Watford | 2 | 1 | Slight |
| Fri 26 Feb 1988 | Watford | 2 | 1 | Slight |
| Sun 28 Feb 1988 | Barnet | 2 | 1 | Slight |
| Thu 3 Mar 1988 | Watford | 3 | 2 | Slight |
| Fri 4 Mar 1988 | Watford | 2 | 1 | Slight |
| Sun 6 Mar 1988 | Barnet | 2 | 2 | Fatal |
| Sat 12 Mar 1988 | Watford | 2 | 1 | Slight |
| Mon 14 Mar 1988 | Hertsmere | 2 | 1 | Slight |
| Wed 16 Mar 1988 | Watford | 2 | 2 | Slight |
| Mon 21 Mar 1988 | Watford | 1 | 1 | Slight |
| Tue 22 Mar 1988 | Barnet | 2 | 1 | Slight |
| Fri 8 Apr 1988 | Watford | 1 | 1 | Serious |
| Tue 12 Apr 1988 | Barnet | 2 | 1 | Slight |
| Tue 12 Apr 1988 | Hertsmere | 2 | 1 | Slight |
| Tue 12 Apr 1988 | Barnet | 2 | 1 | Slight |
| Sat 16 Apr 1988 | Barnet | 1 | 1 | Serious |
| Tue 19 Apr 1988 | Barnet | 3 | 1 | Serious |
| Fri 22 Apr 1988 | Watford | 2 | 1 | Slight |
| Sat 23 Apr 1988 | Watford | 1 | 2 | Slight |
| Sun 24 Apr 1988 | Hertsmere | 2 | 1 | Slight |
| Wed 27 Apr 1988 | Hertsmere | 1 | 1 | Slight |
| Thu 28 Apr 1988 | Barnet | 1 | 1 | Slight |
| Thu 28 Apr 1988 | Watford | 2 | 1 | Serious |
| Thu 28 Apr 1988 | Hertsmere | 1 | 2 | Fatal |
| Sun 1 May 1988 | Barnet | 2 | 1 | Slight |
| Thu 5 May 1988 | Barnet | 1 | 1 | Slight |
| Tue 10 May 1988 | Watford | 2 | 1 | Slight |
| Sat 14 May 1988 | Barnet | 3 | 2 | Slight |
| Sat 14 May 1988 | Hertsmere | 1 | 1 | Slight |
| Tue 17 May 1988 | Watford | 2 | 1 | Serious |
| Tue 17 May 1988 | Watford | 2 | 1 | Slight |
| Wed 18 May 1988 | Barnet | 2 | 1 | Slight |
| Sat 21 May 1988 | Watford | 2 | 1 | Slight |
| Tue 24 May 1988 | Barnet | 1 | 1 | Slight |
| Fri 27 May 1988 | Barnet | 1 | 1 | Slight |
| Fri 27 May 1988 | Watford | 2 | 1 | Slight |
| Sat 28 May 1988 | Watford | 1 | 3 | Serious |
| Mon 30 May 1988 | Watford | 1 | 1 | Fatal |
| Thu 2 Jun 1988 | Watford | 2 | 2 | Slight |
| Sat 4 Jun 1988 | Hertsmere | 3 | 4 | Slight |
| Mon 6 Jun 1988 | Watford | 2 | 1 | Slight |
| Thu 9 Jun 1988 | Barnet | 1 | 1 | Slight |
| Thu 9 Jun 1988 | Barnet | 2 | 1 | Slight |
| Fri 10 Jun 1988 | Watford | 1 | 2 | Serious |
| Fri 10 Jun 1988 | Hertsmere | 2 | 1 | Slight |
| Tue 14 Jun 1988 | Barnet | 2 | 1 | Slight |
| Thu 16 Jun 1988 | Watford | 2 | 2 | Slight |
| Fri 17 Jun 1988 | Barnet | 2 | 1 | Slight |
| Wed 22 Jun 1988 | Watford | 2 | 3 | Slight |
| Fri 24 Jun 1988 | Barnet | 2 | 1 | Slight |
| Sat 2 Jul 1988 | Watford | 2 | 2 | Slight |
| Sun 3 Jul 1988 | Watford | 2 | 2 | Slight |
| Fri 8 Jul 1988 | Barnet | 2 | 1 | Slight |
| Sat 9 Jul 1988 | Barnet | 2 | 2 | Slight |
| Mon 11 Jul 1988 | Barnet | 1 | 1 | Serious |
| Wed 13 Jul 1988 | Barnet | 2 | 1 | Slight |
| Wed 13 Jul 1988 | Barnet | 5 | 4 | Slight |
| Thu 14 Jul 1988 | Hertsmere | 2 | 1 | Serious |
| Fri 15 Jul 1988 | Watford | 3 | 1 | Slight |
| Sat 23 Jul 1988 | Hertsmere | 2 | 1 | Slight |
| Wed 27 Jul 1988 | Barnet | 2 | 3 | Serious |
| Thu 28 Jul 1988 | Watford | 2 | 1 | Slight |
| Thu 28 Jul 1988 | Barnet | 2 | 1 | Slight |
| Mon 1 Aug 1988 | Watford | 2 | 1 | Slight |
| Tue 2 Aug 1988 | Watford | 1 | 1 | Slight |
| Tue 2 Aug 1988 | Hertsmere | 1 | 1 | Serious |
| Thu 4 Aug 1988 | Barnet | 1 | 1 | Serious |
| Sat 6 Aug 1988 | Barnet | 2 | 1 | Slight |
| Tue 16 Aug 1988 | Watford | 1 | 1 | Serious |
| Thu 18 Aug 1988 | Barnet | 2 | 2 | Slight |
| Sat 20 Aug 1988 | Barnet | 2 | 3 | Slight |
| Wed 24 Aug 1988 | Barnet | 1 | 1 | Slight |
| Wed 24 Aug 1988 | Hertsmere | 2 | 1 | Slight |
| Thu 1 Sep 1988 | Barnet | 3 | 1 | Slight |
| Sat 3 Sep 1988 | Watford | 2 | 1 | Slight |
| Mon 5 Sep 1988 | Barnet | 2 | 1 | Slight |
| Mon 5 Sep 1988 | Barnet | 1 | 3 | Slight |
| Tue 6 Sep 1988 | Hertsmere | 2 | 1 | Slight |
| Thu 8 Sep 1988 | Hertsmere | 2 | 1 | Slight |
| Fri 9 Sep 1988 | Watford | 2 | 1 | Slight |
| Sat 10 Sep 1988 | Watford | 2 | 1 | Slight |
| Sat 10 Sep 1988 | Hertsmere | 1 | 1 | Slight |
| Tue 13 Sep 1988 | Watford | 1 | 2 | Serious |
| Fri 16 Sep 1988 | Watford | 2 | 3 | Slight |
| Fri 16 Sep 1988 | Watford | 1 | 1 | Serious |
| Fri 16 Sep 1988 | Barnet | 2 | 1 | Slight |
| Mon 26 Sep 1988 | Watford | 2 | 1 | Slight |
| Tue 27 Sep 1988 | Watford | 2 | 1 | Slight |
| Sat 1 Oct 1988 | Watford | 1 | 1 | Serious |
| Mon 3 Oct 1988 | Hertsmere | 2 | 3 | Slight |
| Fri 7 Oct 1988 | Hertsmere | 2 | 1 | Slight |
| Mon 10 Oct 1988 | Barnet | 3 | 1 | Slight |
| Tue 11 Oct 1988 | Hertsmere | 1 | 1 | Slight |
| Wed 12 Oct 1988 | Hertsmere | 1 | 1 | Slight |
| Wed 12 Oct 1988 | Watford | 2 | 1 | Slight |
| Sun 16 Oct 1988 | Watford | 3 | 1 | Serious |
| Tue 18 Oct 1988 | Watford | 2 | 1 | Slight |
| Thu 20 Oct 1988 | Hertsmere | 2 | 1 | Slight |
| Thu 20 Oct 1988 | Hertsmere | 2 | 1 | Slight |
| Sat 22 Oct 1988 | Barnet | 2 | 2 | Slight |
| Wed 26 Oct 1988 | Hertsmere | 2 | 2 | Slight |
| Sat 29 Oct 1988 | Hertsmere | 2 | 1 | Slight |
| Sat 29 Oct 1988 | Hertsmere | 3 | 2 | Slight |
| Tue 1 Nov 1988 | Hertsmere | 2 | 1 | Slight |
| Fri 4 Nov 1988 | Barnet | 2 | 1 | Slight |
| Wed 9 Nov 1988 | Watford | 4 | 1 | Slight |
| Wed 9 Nov 1988 | Barnet | 2 | 1 | Slight |
| Tue 15 Nov 1988 | Watford | 2 | 2 | Slight |
| Wed 16 Nov 1988 | Barnet | 1 | 2 | Serious |
| Thu 17 Nov 1988 | Watford | 2 | 1 | Slight |
| Sat 19 Nov 1988 | Watford | 2 | 1 | Slight |
| Sun 20 Nov 1988 | Watford | 1 | 1 | Slight |
| Wed 23 Nov 1988 | Watford | 2 | 1 | Slight |
| Wed 23 Nov 1988 | Barnet | 1 | 1 | Serious |
| Tue 29 Nov 1988 | Barnet | 2 | 3 | Slight |
| Wed 30 Nov 1988 | Barnet | 2 | 2 | Slight |
| Wed 30 Nov 1988 | Watford | 2 | 1 | Slight |
| Thu 1 Dec 1988 | Watford | 2 | 1 | Slight |
| Sat 3 Dec 1988 | Hertsmere | 2 | 1 | Slight |
| Wed 7 Dec 1988 | Hertsmere | 2 | 1 | Slight |
| Wed 7 Dec 1988 | Watford | 2 | 1 | Slight |
| Thu 8 Dec 1988 | Hertsmere | 2 | 1 | Slight |
| Thu 8 Dec 1988 | Barnet | 2 | 1 | Slight |
| Mon 12 Dec 1988 | Watford | 2 | 1 | Serious |
| Mon 12 Dec 1988 | Hertsmere | 2 | 1 | Slight |
| Sat 17 Dec 1988 | Watford | 1 | 1 | Serious |
| Sat 17 Dec 1988 | Barnet | 2 | 1 | Slight |
| Sun 18 Dec 1988 | Hertsmere | 2 | 1 | Slight |
| Mon 19 Dec 1988 | Watford | 1 | 1 | Slight |
| Sat 24 Dec 1988 | Hertsmere | 1 | 2 | Slight |
| Mon 26 Dec 1988 | Hertsmere | 2 | 1 | Slight |