Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 19 Jan 2004 | Hertsmere | 3 | 1 | Slight |
| Sat 14 Feb 2004 | Hertsmere | 1 | 1 | Serious |
| Thu 19 Feb 2004 | St. Albans | 1 | 1 | Slight |
| Thu 26 Feb 2004 | Hertsmere | 3 | 1 | Slight |
| Mon 15 Mar 2004 | St. Albans | 3 | 1 | Slight |
| Mon 22 Mar 2004 | Hertsmere | 1 | 1 | Slight |
| Sun 28 Mar 2004 | Hertsmere | 2 | 1 | Slight |
| Thu 1 Apr 2004 | Hertsmere | 2 | 1 | Slight |
| Sat 24 Apr 2004 | Hertsmere | 2 | 2 | Slight |
| Fri 2 Jul 2004 | Hertsmere | 2 | 1 | Slight |
| Wed 18 Aug 2004 | St. Albans | 1 | 1 | Slight |
| Wed 18 Aug 2004 | St. Albans | 2 | 1 | Slight |
| Sat 18 Sep 2004 | Hertsmere | 2 | 4 | Slight |
| Sat 25 Sep 2004 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 3 Oct 2004 | Hertsmere | 2 | 1 | Slight |
| Thu 28 Oct 2004 | Hertsmere | 2 | 4 | Slight |
| Tue 2 Nov 2004 | Hertsmere | 3 | 3 | Serious |
| Sat 13 Nov 2004 | Hertsmere | 1 | 1 | Serious |
| Thu 18 Nov 2004 | Hertsmere | 2 | 2 | Slight |
| Wed 15 Dec 2004 | Hertsmere | 4 | 3 | Serious |
| Wed 22 Dec 2004 | Hertsmere | 1 | 1 | Slight |