Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 4 Jan 1984 | Stevenage | 2 | 1 | Slight |
| Mon 16 Jan 1984 | Stevenage | 2 | 2 | Slight |
| Wed 18 Jan 1984 | Stevenage | 1 | 1 | Serious |
| Sat 21 Jan 1984 | Stevenage | 1 | 1 | Slight |
| Mon 23 Jan 1984 | North Hertfordshire | 3 | 1 | Slight |
| Wed 25 Jan 1984 | East Hertfordshire | 1 | 1 | Slight |
| Fri 27 Jan 1984 | Stevenage | 1 | 1 | Slight |
| Tue 31 Jan 1984 | East Hertfordshire | 1 | 3 | Slight |
| Sat 4 Feb 1984 | North Hertfordshire | 3 | 1 | Slight |
| Fri 10 Feb 1984 | North Hertfordshire | 2 | 2 | Slight |
| Sat 11 Feb 1984 | North Hertfordshire | 2 | 10 | Serious |
| Sun 12 Feb 1984 | East Hertfordshire | 1 | 1 | Slight |
| Wed 15 Feb 1984 | East Hertfordshire | 1 | 1 | Serious |
| Wed 15 Feb 1984 | Stevenage | 1 | 1 | Serious |
| Sun 19 Feb 1984 | Stevenage | 2 | 1 | Serious |
| Tue 21 Feb 1984 | East Hertfordshire | 3 | 3 | Fatal |
| Sun 26 Feb 1984 | Stevenage | 1 | 1 | Serious |
| Fri 9 Mar 1984 | North Hertfordshire | 2 | 1 | Slight |
| Mon 12 Mar 1984 | North Hertfordshire | 1 | 1 | Slight |
| Wed 14 Mar 1984 | North Hertfordshire | 2 | 1 | Slight |
| Wed 14 Mar 1984 | East Hertfordshire | 2 | 1 | Serious |
| Fri 16 Mar 1984 | Stevenage | 2 | 1 | Slight |
| Fri 16 Mar 1984 | Stevenage | 2 | 1 | Slight |
| Fri 16 Mar 1984 | East Hertfordshire | 3 | 1 | Slight |
| Sat 31 Mar 1984 | Stevenage | 1 | 1 | Slight |
| Sat 7 Apr 1984 | East Hertfordshire | 2 | 1 | Slight |
| Wed 11 Apr 1984 | Stevenage | 1 | 1 | Slight |
| Tue 24 Apr 1984 | North Hertfordshire | 2 | 1 | Slight |
| Wed 2 May 1984 | Stevenage | 2 | 1 | Slight |
| Thu 10 May 1984 | Stevenage | 2 | 1 | Slight |
| Sat 12 May 1984 | North Hertfordshire | 1 | 1 | Slight |
| Tue 15 May 1984 | North Hertfordshire | 2 | 1 | Slight |
| Fri 18 May 1984 | East Hertfordshire | 1 | 1 | Serious |
| Sat 26 May 1984 | Salford | 1 | 1 | Serious |
| Mon 28 May 1984 | Stevenage | 1 | 1 | Slight |
| Thu 31 May 1984 | Stevenage | 1 | 1 | Serious |
| Thu 7 Jun 1984 | Stevenage | 2 | 1 | Slight |
| Fri 8 Jun 1984 | East Hertfordshire | 2 | 1 | Slight |
| Sat 30 Jun 1984 | North Hertfordshire | 2 | 1 | Serious |
| Mon 2 Jul 1984 | Stevenage | 1 | 1 | Slight |
| Sat 7 Jul 1984 | Stevenage | 2 | 2 | Slight |
| Mon 9 Jul 1984 | Stevenage | 3 | 1 | Slight |
| Wed 11 Jul 1984 | Stevenage | 2 | 1 | Slight |
| Wed 11 Jul 1984 | Stevenage | 2 | 1 | Slight |
| Mon 30 Jul 1984 | Stevenage | 2 | 1 | Slight |
| Thu 2 Aug 1984 | East Hertfordshire | 3 | 1 | Slight |
| Fri 3 Aug 1984 | East Hertfordshire | 1 | 1 | Slight |
| Wed 8 Aug 1984 | Stevenage | 2 | 2 | Slight |
| Thu 9 Aug 1984 | Stevenage | 2 | 1 | Slight |
| Tue 14 Aug 1984 | North Hertfordshire | 3 | 3 | Serious |
| Thu 23 Aug 1984 | East Hertfordshire | 1 | 1 | Slight |
| Fri 24 Aug 1984 | Stevenage | 2 | 2 | Slight |
| Sat 25 Aug 1984 | North Hertfordshire | 3 | 2 | Slight |
| Sun 26 Aug 1984 | East Hertfordshire | 1 | 2 | Serious |
| Sun 2 Sep 1984 | Stevenage | 2 | 1 | Slight |
| Fri 7 Sep 1984 | East Hertfordshire | 2 | 1 | Slight |
| Sat 8 Sep 1984 | Stevenage | 2 | 1 | Slight |
| Mon 10 Sep 1984 | East Hertfordshire | 3 | 1 | Slight |
| Fri 28 Sep 1984 | Stevenage | 2 | 2 | Slight |
| Thu 4 Oct 1984 | Stevenage | 2 | 1 | Slight |
| Fri 5 Oct 1984 | Stevenage | 1 | 1 | Serious |
| Fri 5 Oct 1984 | East Hertfordshire | 2 | 2 | Slight |
| Fri 12 Oct 1984 | Stevenage | 1 | 1 | Serious |
| Fri 12 Oct 1984 | Stevenage | 2 | 1 | Serious |
| Sat 13 Oct 1984 | Stevenage | 1 | 1 | Slight |
| Sun 14 Oct 1984 | Stevenage | 2 | 1 | Serious |
| Fri 19 Oct 1984 | North Hertfordshire | 3 | 1 | Slight |
| Wed 24 Oct 1984 | North Hertfordshire | 2 | 1 | Slight |
| Sat 27 Oct 1984 | Stevenage | 1 | 3 | Serious |
| Thu 1 Nov 1984 | Stevenage | 1 | 1 | Serious |
| Tue 6 Nov 1984 | Stevenage | 2 | 1 | Slight |
| Wed 7 Nov 1984 | Stevenage | 1 | 1 | Serious |
| Tue 13 Nov 1984 | East Hertfordshire | 1 | 1 | Slight |
| Fri 16 Nov 1984 | Stevenage | 2 | 2 | Slight |
| Fri 16 Nov 1984 | East Hertfordshire | 2 | 1 | Slight |
| Mon 26 Nov 1984 | Stevenage | 2 | 1 | Serious |
| Thu 29 Nov 1984 | Stevenage | 1 | 1 | Slight |
| Fri 30 Nov 1984 | Stevenage | 2 | 2 | Slight |
| Wed 5 Dec 1984 | Stevenage | 2 | 1 | Slight |
| Thu 6 Dec 1984 | East Hertfordshire | 1 | 1 | Slight |
| Wed 12 Dec 1984 | East Hertfordshire | 2 | 1 | Slight |