Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 6 Jan 2003 | Stevenage | 2 | 2 | Slight |
| Wed 8 Jan 2003 | Welwyn Hatfield | 2 | 2 | Slight |
| Fri 10 Jan 2003 | North Hertfordshire | 1 | 1 | Slight |
| Fri 17 Jan 2003 | Stevenage | 2 | 1 | Slight |
| Wed 22 Jan 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 30 Jan 2003 | Stevenage | 2 | 1 | Slight |
| Wed 5 Feb 2003 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 11 Feb 2003 | Welwyn Hatfield | 2 | 2 | Slight |
| Wed 19 Mar 2003 | Stevenage | 2 | 1 | Slight |
| Fri 28 Mar 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 1 Apr 2003 | Welwyn Hatfield | 2 | 2 | Slight |
| Wed 2 Apr 2003 | North Hertfordshire | 1 | 1 | Serious |
| Fri 11 Apr 2003 | North Hertfordshire | 2 | 1 | Slight |
| Tue 15 Apr 2003 | Welwyn Hatfield | 4 | 1 | Slight |
| Fri 18 Apr 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 22 Apr 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 23 Apr 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 23 Apr 2003 | North Hertfordshire | 2 | 1 | Slight |
| Thu 24 Apr 2003 | North Hertfordshire | 2 | 1 | Slight |
| Fri 2 May 2003 | Welwyn Hatfield | 4 | 2 | Serious |
| Fri 9 May 2003 | Stevenage | 2 | 1 | Serious |
| Fri 9 May 2003 | Welwyn Hatfield | 3 | 2 | Slight |
| Sun 11 May 2003 | Welwyn Hatfield | 3 | 1 | Slight |
| Mon 26 May 2003 | Welwyn Hatfield | 2 | 2 | Serious |
| Fri 30 May 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 8 Jun 2003 | North Hertfordshire | 3 | 2 | Slight |
| Sun 8 Jun 2003 | Stevenage | 3 | 1 | Slight |
| Sun 8 Jun 2003 | Stevenage | 3 | 1 | Slight |
| Sun 22 Jun 2003 | North Hertfordshire | 2 | 1 | Slight |
| Tue 1 Jul 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 3 Jul 2003 | Stevenage | 2 | 1 | Slight |
| Sun 13 Jul 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 1 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Fri 1 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Fri 1 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Fri 8 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Fri 8 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 13 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 13 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 13 Aug 2003 | Welwyn Hatfield | 3 | 1 | Slight |
| Tue 19 Aug 2003 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 31 Aug 2003 | North Hertfordshire | 2 | 1 | Slight |
| Thu 4 Sep 2003 | Welwyn Hatfield | 2 | 5 | Slight |
| Thu 25 Sep 2003 | Welwyn Hatfield | 2 | 3 | Slight |
| Thu 9 Oct 2003 | Stevenage | 2 | 1 | Slight |
| Wed 15 Oct 2003 | North Hertfordshire | 2 | 3 | Slight |
| Mon 27 Oct 2003 | Welwyn Hatfield | 1 | 1 | Slight |
| Wed 29 Oct 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 5 Nov 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 5 Nov 2003 | North Hertfordshire | 7 | 1 | Slight |
| Fri 14 Nov 2003 | Stevenage | 2 | 1 | Slight |
| Sat 15 Nov 2003 | North Hertfordshire | 2 | 2 | Slight |
| Fri 21 Nov 2003 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 25 Nov 2003 | Stevenage | 2 | 1 | Slight |
| Sun 30 Nov 2003 | North Hertfordshire | 2 | 1 | Slight |
| Mon 1 Dec 2003 | Stevenage | 1 | 1 | Slight |
| Mon 1 Dec 2003 | Stevenage | 1 | 1 | Slight |
| Tue 2 Dec 2003 | Welwyn Hatfield | 2 | 2 | Slight |
| Wed 10 Dec 2003 | Welwyn Hatfield | 2 | 1 | Serious |
| Thu 11 Dec 2003 | North Hertfordshire | 3 | 2 | Slight |
| Sun 14 Dec 2003 | North Hertfordshire | 2 | 1 | Slight |
| Wed 17 Dec 2003 | Stevenage | 2 | 1 | Slight |
| Sun 21 Dec 2003 | North Hertfordshire | 2 | 3 | Slight |