Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 1 Jan 1979 | North Hertfordshire | 1 | 1 | Fatal |
| Wed 3 Jan 1979 | East Hertfordshire | 1 | 1 | Slight |
| Wed 3 Jan 1979 | East Hertfordshire | 1 | 1 | Slight |
| Mon 15 Jan 1979 | Stevenage | 1 | 2 | Slight |
| Mon 15 Jan 1979 | Stevenage | 1 | 2 | Slight |
| Thu 18 Jan 1979 | Stevenage | 2 | 1 | Slight |
| Thu 18 Jan 1979 | Stevenage | 2 | 1 | Slight |
| Thu 25 Jan 1979 | Stevenage | 2 | 1 | Slight |
| Thu 25 Jan 1979 | Stevenage | 2 | 1 | Slight |
| Thu 25 Jan 1979 | North Hertfordshire | 2 | 1 | Serious |
| Fri 26 Jan 1979 | North Hertfordshire | 1 | 2 | Slight |
| Fri 26 Jan 1979 | North Hertfordshire | 1 | 2 | Slight |
| Fri 26 Jan 1979 | North Hertfordshire | 2 | 1 | Slight |
| Fri 26 Jan 1979 | North Hertfordshire | 2 | 1 | Slight |
| Sun 11 Feb 1979 | Stevenage | 1 | 1 | Serious |
| Tue 27 Feb 1979 | Stevenage | 2 | 2 | Slight |
| Sun 4 Mar 1979 | Stevenage | 2 | 1 | Slight |
| Sun 4 Mar 1979 | Stevenage | 2 | 1 | Slight |
| Wed 7 Mar 1979 | Stevenage | 2 | 2 | Slight |
| Wed 7 Mar 1979 | Stevenage | 2 | 2 | Slight |
| Tue 13 Mar 1979 | East Hertfordshire | 1 | 1 | Slight |
| Mon 19 Mar 1979 | Stevenage | 2 | 1 | Slight |
| Mon 19 Mar 1979 | Stevenage | 2 | 1 | Slight |
| Fri 23 Mar 1979 | North Hertfordshire | 1 | 1 | Slight |
| Tue 27 Mar 1979 | East Hertfordshire | 3 | 1 | Slight |
| Sun 8 Apr 1979 | East Hertfordshire | 2 | 4 | Slight |
| Sat 14 Apr 1979 | Stevenage | 1 | 1 | Slight |
| Sat 14 Apr 1979 | Stevenage | 1 | 1 | Slight |
| Fri 20 Apr 1979 | North Hertfordshire | 1 | 1 | Slight |
| Fri 20 Apr 1979 | North Hertfordshire | 1 | 1 | Slight |
| Tue 24 Apr 1979 | North Hertfordshire | 2 | 1 | Slight |
| Tue 24 Apr 1979 | North Hertfordshire | 2 | 1 | Slight |
| Tue 24 Apr 1979 | Stevenage | 2 | 1 | Slight |
| Tue 24 Apr 1979 | Stevenage | 2 | 1 | Slight |
| Wed 25 Apr 1979 | East Hertfordshire | 3 | 1 | Slight |
| Wed 25 Apr 1979 | East Hertfordshire | 3 | 1 | Slight |
| Sat 28 Apr 1979 | East Hertfordshire | 2 | 3 | Slight |
| Wed 2 May 1979 | North Hertfordshire | 2 | 1 | Slight |
| Wed 2 May 1979 | North Hertfordshire | 2 | 1 | Slight |
| Thu 3 May 1979 | East Hertfordshire | 2 | 1 | Slight |
| Thu 3 May 1979 | East Hertfordshire | 2 | 1 | Slight |
| Wed 9 May 1979 | East Hertfordshire | 2 | 1 | Serious |
| Wed 9 May 1979 | East Hertfordshire | 2 | 1 | Serious |
| Fri 11 May 1979 | North Hertfordshire | 2 | 1 | Slight |
| Fri 11 May 1979 | North Hertfordshire | 2 | 1 | Slight |
| Fri 18 May 1979 | East Hertfordshire | 3 | 2 | Serious |
| Wed 30 May 1979 | Stevenage | 2 | 3 | Serious |
| Thu 31 May 1979 | East Hertfordshire | 2 | 1 | Slight |
| Sat 2 Jun 1979 | North Hertfordshire | 2 | 1 | Slight |
| Sat 2 Jun 1979 | North Hertfordshire | 2 | 1 | Slight |
| Sat 9 Jun 1979 | Stevenage | 2 | 1 | Slight |
| Sat 9 Jun 1979 | Stevenage | 2 | 1 | Slight |
| Fri 15 Jun 1979 | East Hertfordshire | 2 | 1 | Serious |
| Thu 21 Jun 1979 | East Hertfordshire | 2 | 1 | Slight |
| Fri 22 Jun 1979 | Stevenage | 2 | 1 | Slight |
| Sun 24 Jun 1979 | North Hertfordshire | 2 | 2 | Slight |
| Sun 24 Jun 1979 | North Hertfordshire | 2 | 2 | Slight |
| Wed 27 Jun 1979 | North Hertfordshire | 1 | 2 | Fatal |
| Sun 1 Jul 1979 | Stevenage | 1 | 1 | Slight |
| Sun 1 Jul 1979 | Stevenage | 1 | 1 | Slight |
| Fri 6 Jul 1979 | Stevenage | 2 | 1 | Slight |
| Tue 17 Jul 1979 | East Hertfordshire | 2 | 1 | Slight |
| Sun 29 Jul 1979 | Stevenage | 1 | 3 | Slight |
| Sun 29 Jul 1979 | Stevenage | 1 | 3 | Slight |
| Fri 3 Aug 1979 | East Hertfordshire | 2 | 2 | Slight |
| Sat 11 Aug 1979 | Stevenage | 1 | 3 | Serious |
| Sun 12 Aug 1979 | North Hertfordshire | 2 | 1 | Serious |
| Sun 12 Aug 1979 | North Hertfordshire | 2 | 1 | Serious |
| Thu 23 Aug 1979 | Stevenage | 1 | 1 | Serious |
| Thu 23 Aug 1979 | Stevenage | 1 | 1 | Serious |
| Fri 24 Aug 1979 | East Hertfordshire | 2 | 1 | Slight |
| Fri 24 Aug 1979 | East Hertfordshire | 2 | 1 | Slight |
| Wed 5 Sep 1979 | North Hertfordshire | 3 | 2 | Slight |
| Fri 7 Sep 1979 | Stevenage | 3 | 2 | Slight |
| Mon 10 Sep 1979 | Stevenage | 2 | 1 | Slight |
| Sun 16 Sep 1979 | North Hertfordshire | 2 | 1 | Slight |
| Tue 18 Sep 1979 | East Hertfordshire | 2 | 1 | Slight |
| Tue 18 Sep 1979 | East Hertfordshire | 2 | 1 | Slight |
| Thu 20 Sep 1979 | North Hertfordshire | 2 | 1 | Slight |
| Thu 20 Sep 1979 | North Hertfordshire | 2 | 1 | Slight |
| Fri 21 Sep 1979 | Stevenage | 2 | 1 | Slight |
| Fri 21 Sep 1979 | North Hertfordshire | 4 | 1 | Serious |
| Fri 28 Sep 1979 | East Hertfordshire | 2 | 1 | Slight |
| Sun 30 Sep 1979 | Stevenage | 2 | 1 | Slight |
| Sun 30 Sep 1979 | Stevenage | 2 | 1 | Slight |
| Tue 16 Oct 1979 | Stevenage | 1 | 1 | Slight |
| Tue 16 Oct 1979 | Stevenage | 1 | 1 | Slight |
| Thu 25 Oct 1979 | Stevenage | 1 | 1 | Slight |
| Thu 25 Oct 1979 | Stevenage | 1 | 1 | Slight |
| Fri 26 Oct 1979 | Stevenage | 1 | 2 | Slight |
| Fri 2 Nov 1979 | East Hertfordshire | 2 | 1 | Serious |
| Fri 2 Nov 1979 | East Hertfordshire | 2 | 1 | Serious |
| Sat 3 Nov 1979 | East Hertfordshire | 3 | 2 | Serious |
| Tue 13 Nov 1979 | North Hertfordshire | 2 | 1 | Slight |
| Tue 13 Nov 1979 | North Hertfordshire | 2 | 1 | Slight |
| Fri 30 Nov 1979 | North Hertfordshire | 2 | 1 | Serious |
| Fri 30 Nov 1979 | North Hertfordshire | 2 | 1 | Serious |
| Sat 1 Dec 1979 | East Hertfordshire | 1 | 2 | Serious |
| Fri 7 Dec 1979 | North Hertfordshire | 3 | 1 | Slight |
| Thu 13 Dec 1979 | Stevenage | 2 | 2 | Slight |
| Thu 13 Dec 1979 | Stevenage | 2 | 2 | Slight |
| Wed 19 Dec 1979 | East Hertfordshire | 1 | 2 | Serious |
| Fri 21 Dec 1979 | East Hertfordshire | 3 | 1 | Serious |
| Fri 21 Dec 1979 | East Hertfordshire | 3 | 1 | Serious |
| Sat 22 Dec 1979 | North Hertfordshire | 2 | 1 | Slight |
| Sat 22 Dec 1979 | North Hertfordshire | 2 | 1 | Slight |
| Mon 31 Dec 1979 | Stevenage | 2 | 2 | Slight |
| Mon 31 Dec 1979 | Stevenage | 2 | 2 | Slight |