Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 3 Jan 1980 | East Hertfordshire | 4 | 1 | Slight |
| Fri 11 Jan 1980 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 15 Jan 1980 | East Hertfordshire | 3 | 1 | Serious |
| Tue 15 Jan 1980 | East Hertfordshire | 2 | 1 | Slight |
| Tue 15 Jan 1980 | East Hertfordshire | 2 | 1 | Slight |
| Tue 5 Feb 1980 | East Hertfordshire | 2 | 2 | Serious |
| Fri 8 Feb 1980 | East Hertfordshire | 2 | 1 | Slight |
| Tue 1 Apr 1980 | East Hertfordshire | 1 | 1 | Slight |
| Tue 1 Apr 1980 | East Hertfordshire | 1 | 1 | Slight |
| Sun 13 Apr 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 10 May 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 10 May 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sun 18 May 1980 | East Hertfordshire | 2 | 1 | Slight |
| Wed 4 Jun 1980 | East Hertfordshire | 1 | 1 | Slight |
| Sat 14 Jun 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 14 Jun 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 21 Jun 1980 | East Hertfordshire | 3 | 1 | Slight |
| Sat 21 Jun 1980 | East Hertfordshire | 3 | 1 | Slight |
| Tue 24 Jun 1980 | East Hertfordshire | 1 | 1 | Slight |
| Mon 7 Jul 1980 | East Hertfordshire | 1 | 1 | Slight |
| Mon 14 Jul 1980 | East Hertfordshire | 2 | 1 | Slight |
| Mon 14 Jul 1980 | East Hertfordshire | 2 | 1 | Slight |
| Mon 14 Jul 1980 | Welwyn Hatfield | 3 | 3 | Slight |
| Mon 14 Jul 1980 | Welwyn Hatfield | 3 | 3 | Slight |
| Thu 24 Jul 1980 | East Hertfordshire | 2 | 1 | Slight |
| Thu 24 Jul 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 9 Aug 1980 | East Hertfordshire | 2 | 1 | Slight |
| Sat 9 Aug 1980 | East Hertfordshire | 2 | 1 | Slight |
| Mon 25 Aug 1980 | East Hertfordshire | 1 | 1 | Serious |
| Mon 1 Sep 1980 | East Hertfordshire | 2 | 1 | Slight |
| Mon 1 Sep 1980 | East Hertfordshire | 2 | 1 | Slight |
| Thu 4 Sep 1980 | East Hertfordshire | 3 | 3 | Slight |
| Thu 4 Sep 1980 | East Hertfordshire | 3 | 3 | Slight |
| Fri 5 Sep 1980 | East Hertfordshire | 2 | 5 | Serious |
| Fri 5 Sep 1980 | East Hertfordshire | 2 | 5 | Serious |
| Fri 5 Sep 1980 | East Hertfordshire | 2 | 1 | Slight |
| Fri 5 Sep 1980 | East Hertfordshire | 2 | 1 | Slight |
| Mon 8 Sep 1980 | East Hertfordshire | 1 | 1 | Slight |
| Mon 8 Sep 1980 | East Hertfordshire | 1 | 1 | Slight |
| Sat 13 Sep 1980 | East Hertfordshire | 1 | 1 | Slight |
| Sat 13 Sep 1980 | East Hertfordshire | 1 | 1 | Slight |
| Fri 31 Oct 1980 | East Hertfordshire | 2 | 1 | Slight |
| Fri 31 Oct 1980 | East Hertfordshire | 2 | 1 | Slight |
| Wed 5 Nov 1980 | East Hertfordshire | 2 | 1 | Serious |
| Wed 5 Nov 1980 | East Hertfordshire | 2 | 1 | Serious |
| Fri 7 Nov 1980 | East Hertfordshire | 1 | 3 | Slight |
| Wed 12 Nov 1980 | East Hertfordshire | 1 | 1 | Slight |
| Wed 12 Nov 1980 | East Hertfordshire | 1 | 1 | Slight |
| Sun 16 Nov 1980 | Welwyn Hatfield | 2 | 2 | Slight |
| Thu 20 Nov 1980 | East Hertfordshire | 3 | 1 | Slight |
| Thu 20 Nov 1980 | East Hertfordshire | 3 | 1 | Slight |
| Mon 8 Dec 1980 | Welwyn Hatfield | 1 | 1 | Slight |
| Sat 13 Dec 1980 | East Hertfordshire | 3 | 1 | Slight |
| Tue 16 Dec 1980 | Welwyn Hatfield | 2 | 4 | Slight |
| Mon 22 Dec 1980 | East Hertfordshire | 1 | 1 | Slight |
| Mon 22 Dec 1980 | East Hertfordshire | 1 | 1 | Slight |
| Tue 30 Dec 1980 | East Hertfordshire | 2 | 2 | Serious |
| Tue 30 Dec 1980 | East Hertfordshire | 2 | 2 | Serious |