Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 2 Jan 2003 | Watford | 4 | 2 | Slight |
| Thu 2 Jan 2003 | Watford | 4 | 2 | Slight |
| Thu 2 Jan 2003 | Barnet | 2 | 1 | Slight |
| Tue 7 Jan 2003 | Barnet | 1 | 1 | Slight |
| Wed 8 Jan 2003 | Watford | 1 | 1 | Slight |
| Wed 8 Jan 2003 | Watford | 2 | 1 | Slight |
| Mon 13 Jan 2003 | Barnet | 2 | 1 | Slight |
| Wed 22 Jan 2003 | Barnet | 2 | 2 | Serious |
| Wed 22 Jan 2003 | Barnet | 2 | 1 | Slight |
| Thu 23 Jan 2003 | Watford | 3 | 1 | Slight |
| Sun 26 Jan 2003 | Barnet | 4 | 3 | Slight |
| Mon 3 Feb 2003 | Watford | 1 | 1 | Slight |
| Tue 4 Feb 2003 | Watford | 2 | 1 | Slight |
| Tue 4 Feb 2003 | Watford | 2 | 1 | Slight |
| Thu 6 Feb 2003 | Barnet | 2 | 1 | Serious |
| Thu 6 Feb 2003 | Barnet | 2 | 1 | Slight |
| Fri 7 Feb 2003 | Barnet | 2 | 2 | Slight |
| Fri 7 Feb 2003 | Watford | 2 | 1 | Slight |
| Tue 11 Feb 2003 | Hertsmere | 2 | 1 | Slight |
| Tue 11 Feb 2003 | Watford | 1 | 1 | Slight |
| Fri 14 Feb 2003 | Hertsmere | 1 | 1 | Serious |
| Mon 17 Feb 2003 | Watford | 2 | 2 | Slight |
| Wed 19 Feb 2003 | Barnet | 1 | 1 | Slight |
| Tue 4 Mar 2003 | Watford | 2 | 1 | Serious |
| Fri 7 Mar 2003 | Watford | 1 | 1 | Slight |
| Mon 10 Mar 2003 | Barnet | 2 | 2 | Serious |
| Mon 10 Mar 2003 | Barnet | 2 | 1 | Slight |
| Tue 11 Mar 2003 | Watford | 2 | 2 | Slight |
| Tue 18 Mar 2003 | Watford | 2 | 1 | Slight |
| Wed 26 Mar 2003 | Barnet | 2 | 1 | Slight |
| Fri 28 Mar 2003 | Hertsmere | 2 | 1 | Slight |
| Mon 31 Mar 2003 | Watford | 2 | 3 | Serious |
| Tue 1 Apr 2003 | Watford | 2 | 2 | Serious |
| Fri 4 Apr 2003 | Barnet | 2 | 1 | Slight |
| Fri 11 Apr 2003 | Hertsmere | 2 | 1 | Slight |
| Sun 20 Apr 2003 | Hertsmere | 3 | 1 | Serious |
| Sun 20 Apr 2003 | Watford | 2 | 1 | Slight |
| Mon 21 Apr 2003 | Hertsmere | 1 | 1 | Serious |
| Wed 23 Apr 2003 | Watford | 2 | 1 | Slight |
| Fri 25 Apr 2003 | Barnet | 2 | 3 | Slight |
| Fri 25 Apr 2003 | Barnet | 2 | 3 | Slight |
| Tue 29 Apr 2003 | Barnet | 1 | 1 | Serious |
| Wed 30 Apr 2003 | Watford | 2 | 1 | Serious |
| Wed 30 Apr 2003 | Watford | 2 | 1 | Serious |
| Sun 4 May 2003 | Hertsmere | 2 | 1 | Slight |
| Fri 9 May 2003 | Barnet | 2 | 1 | Slight |
| Tue 13 May 2003 | Watford | 2 | 1 | Slight |
| Fri 16 May 2003 | Hertsmere | 1 | 1 | Slight |
| Fri 16 May 2003 | Hertsmere | 1 | 1 | Slight |
| Sat 17 May 2003 | Watford | 1 | 1 | Slight |
| Tue 27 May 2003 | Watford | 2 | 3 | Slight |
| Mon 2 Jun 2003 | Watford | 2 | 2 | Slight |
| Wed 4 Jun 2003 | Hertsmere | 1 | 1 | Slight |
| Sat 14 Jun 2003 | Watford | 2 | 1 | Slight |
| Wed 18 Jun 2003 | Hertsmere | 2 | 2 | Slight |
| Wed 18 Jun 2003 | Barnet | 2 | 1 | Slight |
| Fri 20 Jun 2003 | Barnet | 2 | 2 | Slight |
| Mon 23 Jun 2003 | Hertsmere | 2 | 4 | Slight |
| Sun 29 Jun 2003 | Watford | 2 | 1 | Slight |
| Thu 3 Jul 2003 | Barnet | 2 | 1 | Serious |
| Sun 6 Jul 2003 | Hertsmere | 3 | 2 | Slight |
| Sun 6 Jul 2003 | Watford | 2 | 1 | Slight |
| Sun 6 Jul 2003 | Barnet | 1 | 1 | Slight |
| Wed 9 Jul 2003 | Watford | 2 | 3 | Slight |
| Fri 11 Jul 2003 | Hertsmere | 2 | 1 | Slight |
| Mon 14 Jul 2003 | Watford | 2 | 1 | Slight |
| Thu 24 Jul 2003 | Hertsmere | 1 | 1 | Slight |
| Fri 25 Jul 2003 | Watford | 2 | 1 | Slight |
| Sat 26 Jul 2003 | Watford | 2 | 6 | Slight |
| Wed 30 Jul 2003 | Watford | 2 | 1 | Slight |
| Sat 9 Aug 2003 | Watford | 2 | 1 | Slight |
| Sat 9 Aug 2003 | Watford | 2 | 1 | Slight |
| Mon 18 Aug 2003 | Barnet | 2 | 1 | Slight |
| Thu 28 Aug 2003 | Hertsmere | 1 | 1 | Slight |
| Mon 1 Sep 2003 | Watford | 2 | 3 | Slight |
| Tue 2 Sep 2003 | Barnet | 2 | 1 | Slight |
| Fri 12 Sep 2003 | Hertsmere | 3 | 1 | Slight |
| Sun 14 Sep 2003 | Hertsmere | 2 | 1 | Slight |
| Sun 14 Sep 2003 | Watford | 2 | 2 | Slight |
| Mon 15 Sep 2003 | Barnet | 2 | 1 | Serious |
| Tue 16 Sep 2003 | Hertsmere | 2 | 1 | Slight |
| Tue 16 Sep 2003 | Barnet | 2 | 1 | Slight |
| Fri 19 Sep 2003 | Watford | 1 | 1 | Slight |
| Fri 19 Sep 2003 | Watford | 1 | 1 | Slight |
| Sun 21 Sep 2003 | Barnet | 1 | 1 | Slight |
| Tue 23 Sep 2003 | Barnet | 1 | 1 | Slight |
| Fri 26 Sep 2003 | Watford | 2 | 1 | Slight |
| Fri 26 Sep 2003 | Watford | 2 | 1 | Slight |
| Sat 4 Oct 2003 | Barnet | 2 | 2 | Serious |
| Tue 7 Oct 2003 | Hertsmere | 2 | 1 | Slight |
| Thu 9 Oct 2003 | Watford | 2 | 3 | Slight |
| Thu 9 Oct 2003 | Watford | 2 | 3 | Slight |
| Sat 11 Oct 2003 | Watford | 1 | 1 | Slight |
| Sat 11 Oct 2003 | Watford | 2 | 2 | Slight |
| Sat 18 Oct 2003 | Watford | 2 | 1 | Slight |
| Mon 20 Oct 2003 | Hertsmere | 2 | 1 | Slight |
| Mon 20 Oct 2003 | Barnet | 2 | 1 | Slight |
| Tue 21 Oct 2003 | Barnet | 2 | 1 | Serious |
| Thu 23 Oct 2003 | Hertsmere | 2 | 2 | Slight |
| Thu 30 Oct 2003 | Watford | 2 | 2 | Slight |
| Thu 30 Oct 2003 | Watford | 2 | 2 | Slight |
| Thu 30 Oct 2003 | Barnet | 2 | 1 | Serious |
| Fri 31 Oct 2003 | Barnet | 1 | 1 | Slight |
| Sun 2 Nov 2003 | Barnet | 2 | 3 | Slight |
| Sun 2 Nov 2003 | Hertsmere | 1 | 1 | Slight |
| Thu 6 Nov 2003 | Watford | 2 | 1 | Slight |
| Sat 8 Nov 2003 | Watford | 3 | 2 | Slight |
| Tue 11 Nov 2003 | Barnet | 3 | 3 | Slight |
| Tue 11 Nov 2003 | Barnet | 3 | 3 | Slight |
| Thu 20 Nov 2003 | Watford | 2 | 1 | Slight |
| Sat 22 Nov 2003 | Barnet | 1 | 1 | Slight |
| Tue 25 Nov 2003 | Watford | 1 | 1 | Slight |
| Sun 30 Nov 2003 | Barnet | 1 | 1 | Serious |
| Wed 3 Dec 2003 | Barnet | 1 | 1 | Slight |
| Wed 3 Dec 2003 | Hertsmere | 2 | 1 | Slight |
| Fri 5 Dec 2003 | Barnet | 1 | 1 | Slight |
| Mon 8 Dec 2003 | Watford | 2 | 1 | Slight |
| Mon 8 Dec 2003 | Watford | 2 | 1 | Slight |
| Mon 8 Dec 2003 | Watford | 2 | 1 | Slight |
| Mon 8 Dec 2003 | Watford | 1 | 1 | Slight |
| Fri 12 Dec 2003 | Watford | 1 | 1 | Slight |
| Thu 18 Dec 2003 | Watford | 1 | 1 | Slight |
| Mon 22 Dec 2003 | Watford | 1 | 2 | Slight |