Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 22 Jan 1999 | East Hertfordshire | 2 | 1 | Serious |
| Thu 15 Apr 1999 | Broxbourne | 1 | 4 | Serious |
| Fri 4 Jun 1999 | East Hertfordshire | 2 | 1 | Slight |
| Mon 7 Jun 1999 | Broxbourne | 2 | 1 | Serious |
| Wed 16 Jun 1999 | East Hertfordshire | 2 | 1 | Slight |
| Tue 6 Jul 1999 | East Hertfordshire | 3 | 1 | Slight |
| Fri 6 Aug 1999 | East Hertfordshire | 1 | 1 | Slight |
| Wed 15 Sep 1999 | Broxbourne | 1 | 1 | Slight |
| Mon 27 Sep 1999 | Broxbourne | 2 | 1 | Slight |
| Thu 2 Dec 1999 | Broxbourne | 1 | 1 | Slight |
| Thu 2 Dec 1999 | East Hertfordshire | 2 | 1 | Slight |