Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 2 Apr 1999 | East Hertfordshire | 2 | 2 | Slight |
| Wed 14 Apr 1999 | South Cambridgeshire | 2 | 1 | Slight |
| Sun 18 Apr 1999 | East Hertfordshire | 2 | 1 | Slight |
| Thu 22 Apr 1999 | East Hertfordshire | 3 | 1 | Slight |
| Sat 29 May 1999 | North Hertfordshire | 2 | 3 | Slight |
| Fri 4 Jun 1999 | East Hertfordshire | 2 | 1 | Serious |
| Mon 2 Aug 1999 | East Hertfordshire | 2 | 2 | Serious |
| Mon 2 Aug 1999 | East Hertfordshire | 2 | 1 | Slight |
| Wed 4 Aug 1999 | South Cambridgeshire | 2 | 1 | Slight |
| Sat 14 Aug 1999 | East Hertfordshire | 1 | 3 | Slight |
| Thu 2 Sep 1999 | North Hertfordshire | 2 | 3 | Slight |
| Wed 6 Oct 1999 | South Cambridgeshire | 2 | 1 | Slight |
| Sun 17 Oct 1999 | East Hertfordshire | 1 | 1 | Serious |
| Thu 21 Oct 1999 | East Hertfordshire | 2 | 2 | Slight |
| Sat 23 Oct 1999 | South Cambridgeshire | 2 | 2 | Slight |