Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sun 24 Jan 1999 | Welwyn Hatfield | 2 | 2 | Serious |
| Tue 26 Jan 1999 | Welwyn Hatfield | 3 | 3 | Fatal |
| Fri 29 Jan 1999 | Welwyn Hatfield | 1 | 1 | Serious |
| Thu 18 Mar 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 16 Apr 1999 | Welwyn Hatfield | 1 | 2 | Slight |
| Tue 20 Apr 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 23 Apr 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 24 Apr 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 20 May 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 2 Jun 1999 | Welwyn Hatfield | 3 | 1 | Slight |
| Wed 30 Jun 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 30 Jun 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 15 Sep 1999 | Welwyn Hatfield | 1 | 1 | Serious |
| Wed 15 Sep 1999 | Welwyn Hatfield | 1 | 1 | Serious |
| Thu 21 Oct 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 28 Oct 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 2 Dec 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 2 Dec 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 5 Dec 1999 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 21 Dec 1999 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 21 Dec 1999 | Welwyn Hatfield | 2 | 1 | Slight |