Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Tue 31 Jan 1984 | East Hertfordshire | 2 | 2 | Slight |
| Wed 14 Mar 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Thu 29 Mar 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 30 Mar 1984 | East Hertfordshire | 2 | 3 | Fatal |
| Fri 6 Apr 1984 | Welwyn Hatfield | 3 | 1 | Slight |
| Fri 6 Apr 1984 | Welwyn Hatfield | 3 | 1 | Slight |
| Sat 7 Apr 1984 | Welwyn Hatfield | 1 | 1 | Serious |
| Mon 21 May 1984 | East Hertfordshire | 2 | 1 | Slight |
| Wed 23 May 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 27 May 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 19 Jun 1984 | East Hertfordshire | 2 | 1 | Slight |
| Thu 28 Jun 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 29 Jun 1984 | Welwyn Hatfield | 1 | 1 | Serious |
| Sat 7 Jul 1984 | Hertsmere | 2 | 1 | Slight |
| Tue 10 Jul 1984 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 10 Aug 1984 | Welwyn Hatfield | 1 | 1 | Serious |
| Thu 6 Sep 1984 | East Hertfordshire | 2 | 1 | Slight |
| Sat 8 Sep 1984 | East Hertfordshire | 2 | 1 | Serious |
| Sat 29 Sep 1984 | Welwyn Hatfield | 2 | 2 | Slight |
| Sat 29 Sep 1984 | Welwyn Hatfield | 2 | 2 | Slight |
| Wed 21 Nov 1984 | Welwyn Hatfield | 3 | 1 | Slight |
| Mon 26 Nov 1984 | East Hertfordshire | 1 | 1 | Slight |
| Mon 17 Dec 1984 | East Hertfordshire | 1 | 1 | Slight |