Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 11 Jan 1988 | Welwyn Hatfield | 1 | 1 | Serious |
| Mon 11 Jan 1988 | Stevenage | 2 | 1 | Slight |
| Fri 15 Jan 1988 | Hertsmere | 1 | 1 | Slight |
| Wed 20 Jan 1988 | Welwyn Hatfield | 3 | 1 | Slight |
| Thu 21 Jan 1988 | North Hertfordshire | 3 | 1 | Slight |
| Fri 22 Jan 1988 | North Hertfordshire | 2 | 1 | Slight |
| Mon 25 Jan 1988 | North Hertfordshire | 2 | 1 | Slight |
| Sat 30 Jan 1988 | North Hertfordshire | 2 | 3 | Slight |
| Mon 1 Feb 1988 | Stevenage | 2 | 1 | Serious |
| Sat 6 Feb 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 9 Feb 1988 | Welwyn Hatfield | 3 | 1 | Slight |
| Wed 17 Feb 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 15 Mar 1988 | Welwyn Hatfield | 3 | 2 | Slight |
| Thu 24 Mar 1988 | Welwyn Hatfield | 3 | 1 | Slight |
| Thu 24 Mar 1988 | Welwyn Hatfield | 2 | 4 | Serious |
| Tue 29 Mar 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 1 Apr 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 6 Apr 1988 | Stevenage | 2 | 1 | Slight |
| Fri 8 Apr 1988 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 3 May 1988 | Welwyn Hatfield | 1 | 1 | Slight |
| Fri 20 May 1988 | Stevenage | 2 | 1 | Slight |
| Sat 21 May 1988 | North Hertfordshire | 3 | 2 | Slight |
| Tue 14 Jun 1988 | Stevenage | 2 | 2 | Slight |
| Sun 19 Jun 1988 | Stevenage | 2 | 1 | Slight |
| Mon 27 Jun 1988 | North Hertfordshire | 4 | 2 | Slight |
| Wed 29 Jun 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 1 Jul 1988 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 3 Jul 1988 | Hertsmere | 2 | 1 | Slight |
| Thu 7 Jul 1988 | North Hertfordshire | 2 | 1 | Slight |
| Sat 16 Jul 1988 | Welwyn Hatfield | 2 | 1 | Serious |
| Sun 17 Jul 1988 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 17 Jul 1988 | North Hertfordshire | 2 | 1 | Slight |
| Mon 25 Jul 1988 | Welwyn Hatfield | 3 | 3 | Slight |
| Mon 1 Aug 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 12 Aug 1988 | Welwyn Hatfield | 2 | 2 | Slight |
| Fri 19 Aug 1988 | Welwyn Hatfield | 1 | 1 | Slight |
| Fri 19 Aug 1988 | North Hertfordshire | 2 | 1 | Serious |
| Sat 3 Sep 1988 | North Hertfordshire | 3 | 1 | Slight |
| Mon 12 Sep 1988 | North Hertfordshire | 5 | 1 | Slight |
| Mon 19 Sep 1988 | Stevenage | 2 | 1 | Slight |
| Mon 19 Sep 1988 | Stevenage | 2 | 1 | Slight |
| Tue 20 Sep 1988 | North Hertfordshire | 2 | 1 | Slight |
| Sat 24 Sep 1988 | North Hertfordshire | 2 | 1 | Slight |
| Mon 3 Oct 1988 | Hertsmere | 3 | 2 | Slight |
| Tue 11 Oct 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 12 Oct 1988 | Welwyn Hatfield | 1 | 1 | Serious |
| Thu 13 Oct 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 15 Oct 1988 | Welwyn Hatfield | 2 | 1 | Serious |
| Tue 18 Oct 1988 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 18 Oct 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 20 Oct 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 26 Oct 1988 | Welwyn Hatfield | 4 | 2 | Slight |
| Sat 29 Oct 1988 | Stevenage | 1 | 1 | Serious |
| Mon 7 Nov 1988 | Welwyn Hatfield | 2 | 4 | Slight |
| Wed 9 Nov 1988 | Welwyn Hatfield | 2 | 1 | Serious |
| Fri 11 Nov 1988 | North Hertfordshire | 2 | 1 | Serious |
| Fri 25 Nov 1988 | Stevenage | 2 | 1 | Slight |
| Wed 30 Nov 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 1 Dec 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 6 Dec 1988 | North Hertfordshire | 2 | 1 | Slight |
| Tue 6 Dec 1988 | Stevenage | 1 | 1 | Fatal |
| Fri 9 Dec 1988 | Welwyn Hatfield | 2 | 1 | Serious |
| Mon 12 Dec 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Mon 12 Dec 1988 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 14 Dec 1988 | Stevenage | 2 | 2 | Slight |
| Fri 16 Dec 1988 | North Hertfordshire | 2 | 1 | Slight |
| Wed 21 Dec 1988 | Welwyn Hatfield | 2 | 2 | Slight |