Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 2 Jan 1980 | St. Albans | 2 | 1 | Slight |
| Wed 2 Jan 1980 | St. Albans | 2 | 1 | Slight |
| Fri 4 Jan 1980 | Watford | 2 | 1 | Slight |
| Sat 5 Jan 1980 | St. Albans | 1 | 1 | Slight |
| Sat 5 Jan 1980 | St. Albans | 1 | 1 | Slight |
| Thu 10 Jan 1980 | St. Albans | 2 | 1 | Slight |
| Mon 14 Jan 1980 | Three Rivers | 3 | 2 | Slight |
| Wed 16 Jan 1980 | St. Albans | 1 | 1 | Slight |
| Fri 18 Jan 1980 | St. Albans | 4 | 1 | Slight |
| Sat 19 Jan 1980 | Watford | 2 | 1 | Slight |
| Sat 19 Jan 1980 | Watford | 2 | 1 | Slight |
| Mon 21 Jan 1980 | St. Albans | 2 | 1 | Serious |
| Mon 21 Jan 1980 | St. Albans | 2 | 1 | Serious |
| Fri 1 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Fri 1 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Sat 2 Feb 1980 | Three Rivers | 2 | 2 | Slight |
| Sat 2 Feb 1980 | Three Rivers | 2 | 2 | Slight |
| Mon 4 Feb 1980 | St. Albans | 1 | 1 | Serious |
| Mon 4 Feb 1980 | St. Albans | 1 | 1 | Serious |
| Mon 11 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Mon 11 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Sat 16 Feb 1980 | Watford | 2 | 1 | Slight |
| Sat 16 Feb 1980 | Watford | 2 | 1 | Slight |
| Wed 20 Feb 1980 | St. Albans | 1 | 1 | Slight |
| Mon 25 Feb 1980 | Watford | 1 | 2 | Serious |
| Mon 25 Feb 1980 | Watford | 1 | 2 | Serious |
| Mon 25 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Mon 25 Feb 1980 | Three Rivers | 2 | 1 | Slight |
| Tue 26 Feb 1980 | Watford | 3 | 1 | Serious |
| Fri 29 Feb 1980 | Watford | 1 | 1 | Slight |
| Thu 6 Mar 1980 | Three Rivers | 2 | 1 | Slight |
| Thu 6 Mar 1980 | Three Rivers | 2 | 1 | Slight |
| Thu 6 Mar 1980 | Watford | 2 | 1 | Slight |
| Thu 6 Mar 1980 | Watford | 2 | 1 | Slight |
| Thu 6 Mar 1980 | Three Rivers | 2 | 1 | Slight |
| Thu 6 Mar 1980 | Three Rivers | 2 | 1 | Slight |
| Sun 9 Mar 1980 | Watford | 2 | 1 | Serious |
| Wed 12 Mar 1980 | St. Albans | 1 | 1 | Serious |
| Wed 12 Mar 1980 | St. Albans | 1 | 1 | Serious |
| Fri 14 Mar 1980 | Three Rivers | 3 | 1 | Serious |
| Fri 14 Mar 1980 | Three Rivers | 3 | 1 | Serious |
| Fri 14 Mar 1980 | Watford | 1 | 1 | Slight |
| Sun 16 Mar 1980 | St. Albans | 1 | 2 | Slight |
| Mon 24 Mar 1980 | St. Albans | 2 | 1 | Serious |
| Mon 24 Mar 1980 | St. Albans | 2 | 1 | Serious |
| Mon 7 Apr 1980 | Welwyn Hatfield | 2 | 1 | Slight |
| Mon 7 Apr 1980 | Welwyn Hatfield | 2 | 1 | Slight |
| Mon 7 Apr 1980 | St. Albans | 2 | 1 | Slight |
| Mon 7 Apr 1980 | St. Albans | 2 | 1 | Slight |
| Tue 8 Apr 1980 | St. Albans | 1 | 1 | Serious |
| Tue 8 Apr 1980 | St. Albans | 1 | 1 | Serious |
| Tue 8 Apr 1980 | St. Albans | 2 | 2 | Slight |
| Thu 10 Apr 1980 | St. Albans | 2 | 1 | Serious |
| Mon 21 Apr 1980 | Watford | 4 | 1 | Slight |
| Mon 21 Apr 1980 | Watford | 4 | 1 | Slight |
| Thu 24 Apr 1980 | Three Rivers | 2 | 1 | Serious |
| Thu 24 Apr 1980 | Three Rivers | 2 | 1 | Serious |
| Mon 28 Apr 1980 | Watford | 2 | 1 | Slight |
| Mon 28 Apr 1980 | Watford | 2 | 1 | Slight |
| Fri 16 May 1980 | Three Rivers | 3 | 1 | Slight |
| Tue 20 May 1980 | Three Rivers | 2 | 1 | Slight |
| Tue 20 May 1980 | Three Rivers | 2 | 1 | Slight |
| Tue 20 May 1980 | Watford | 2 | 1 | Slight |
| Wed 28 May 1980 | Three Rivers | 2 | 3 | Fatal |
| Fri 30 May 1980 | St. Albans | 1 | 1 | Slight |
| Sat 31 May 1980 | Watford | 2 | 1 | Slight |
| Sat 7 Jun 1980 | Watford | 2 | 1 | Slight |
| Sat 7 Jun 1980 | Watford | 2 | 1 | Slight |
| Sun 8 Jun 1980 | St. Albans | 1 | 2 | Slight |
| Sun 8 Jun 1980 | St. Albans | 1 | 2 | Slight |
| Mon 9 Jun 1980 | St. Albans | 2 | 1 | Fatal |
| Tue 17 Jun 1980 | St. Albans | 1 | 1 | Slight |
| Wed 18 Jun 1980 | Watford | 3 | 1 | Slight |
| Fri 20 Jun 1980 | Three Rivers | 2 | 1 | Serious |
| Mon 30 Jun 1980 | St. Albans | 3 | 1 | Slight |
| Mon 30 Jun 1980 | St. Albans | 3 | 1 | Slight |
| Sun 6 Jul 1980 | St. Albans | 2 | 1 | Slight |
| Mon 7 Jul 1980 | St. Albans | 1 | 1 | Slight |
| Sat 12 Jul 1980 | Watford | 2 | 1 | Slight |
| Sat 12 Jul 1980 | Watford | 2 | 1 | Slight |
| Sat 12 Jul 1980 | Three Rivers | 2 | 1 | Serious |
| Thu 17 Jul 1980 | St. Albans | 1 | 1 | Slight |
| Sat 19 Jul 1980 | St. Albans | 1 | 4 | Slight |
| Sat 19 Jul 1980 | St. Albans | 1 | 4 | Slight |
| Sat 26 Jul 1980 | St. Albans | 2 | 2 | Serious |
| Fri 1 Aug 1980 | St. Albans | 1 | 1 | Serious |
| Tue 19 Aug 1980 | Watford | 2 | 2 | Slight |
| Mon 25 Aug 1980 | St. Albans | 1 | 1 | Slight |
| Thu 28 Aug 1980 | St. Albans | 1 | 1 | Slight |
| Sat 30 Aug 1980 | St. Albans | 1 | 2 | Serious |
| Sat 30 Aug 1980 | St. Albans | 1 | 2 | Serious |
| Sun 31 Aug 1980 | St. Albans | 2 | 1 | Slight |
| Sun 31 Aug 1980 | St. Albans | 2 | 1 | Slight |
| Mon 8 Sep 1980 | St. Albans | 1 | 1 | Serious |
| Thu 18 Sep 1980 | St. Albans | 1 | 2 | Serious |
| Fri 19 Sep 1980 | Three Rivers | 1 | 1 | Slight |
| Fri 26 Sep 1980 | St. Albans | 2 | 1 | Slight |
| Fri 26 Sep 1980 | St. Albans | 2 | 1 | Slight |
| Fri 3 Oct 1980 | Watford | 2 | 1 | Slight |
| Fri 3 Oct 1980 | Watford | 2 | 1 | Slight |
| Fri 10 Oct 1980 | St. Albans | 1 | 2 | Serious |
| Fri 10 Oct 1980 | St. Albans | 1 | 2 | Serious |
| Tue 21 Oct 1980 | Watford | 2 | 2 | Serious |
| Tue 21 Oct 1980 | Watford | 2 | 2 | Serious |
| Wed 22 Oct 1980 | Watford | 2 | 2 | Slight |
| Wed 22 Oct 1980 | Watford | 2 | 2 | Slight |
| Wed 22 Oct 1980 | St. Albans | 1 | 1 | Serious |
| Fri 24 Oct 1980 | St. Albans | 1 | 2 | Serious |
| Fri 24 Oct 1980 | St. Albans | 1 | 2 | Serious |
| Fri 24 Oct 1980 | St. Albans | 1 | 1 | Slight |
| Fri 24 Oct 1980 | St. Albans | 1 | 1 | Slight |
| Tue 28 Oct 1980 | Watford | 2 | 1 | Slight |
| Tue 28 Oct 1980 | Watford | 2 | 1 | Slight |
| Fri 31 Oct 1980 | St. Albans | 2 | 2 | Slight |
| Fri 7 Nov 1980 | Three Rivers | 1 | 1 | Slight |
| Sat 8 Nov 1980 | St. Albans | 2 | 1 | Slight |
| Sun 9 Nov 1980 | Watford | 1 | 1 | Slight |
| Sun 9 Nov 1980 | Watford | 1 | 1 | Slight |
| Wed 12 Nov 1980 | Three Rivers | 2 | 1 | Slight |
| Wed 12 Nov 1980 | Three Rivers | 2 | 1 | Slight |
| Wed 19 Nov 1980 | Watford | 2 | 1 | Slight |
| Sat 22 Nov 1980 | Three Rivers | 1 | 1 | Slight |
| Mon 24 Nov 1980 | Watford | 2 | 1 | Slight |
| Mon 24 Nov 1980 | Watford | 2 | 1 | Slight |
| Mon 24 Nov 1980 | Watford | 2 | 1 | Slight |
| Mon 24 Nov 1980 | Watford | 2 | 1 | Slight |
| Thu 27 Nov 1980 | Three Rivers | 2 | 1 | Fatal |
| Sat 29 Nov 1980 | St. Albans | 1 | 2 | Serious |
| Sat 29 Nov 1980 | St. Albans | 1 | 2 | Serious |
| Fri 5 Dec 1980 | St. Albans | 1 | 1 | Serious |
| Sat 6 Dec 1980 | Three Rivers | 2 | 1 | Slight |
| Sat 6 Dec 1980 | Three Rivers | 2 | 1 | Slight |
| Sat 13 Dec 1980 | Watford | 1 | 1 | Slight |
| Sat 13 Dec 1980 | Watford | 1 | 1 | Slight |
| Mon 15 Dec 1980 | Three Rivers | 1 | 1 | Slight |
| Mon 15 Dec 1980 | Three Rivers | 1 | 1 | Slight |
| Thu 18 Dec 1980 | Three Rivers | 1 | 1 | Slight |
| Thu 18 Dec 1980 | Three Rivers | 1 | 1 | Slight |
| Fri 19 Dec 1980 | St. Albans | 2 | 1 | Fatal |
| Fri 19 Dec 1980 | St. Albans | 2 | 1 | Fatal |
| Sun 21 Dec 1980 | Three Rivers | 1 | 3 | Slight |
| Mon 22 Dec 1980 | Watford | 3 | 2 | Fatal |
| Mon 22 Dec 1980 | Watford | 3 | 2 | Fatal |
| Wed 24 Dec 1980 | St. Albans | 1 | 4 | Serious |
| Wed 24 Dec 1980 | St. Albans | 1 | 4 | Serious |
| Wed 24 Dec 1980 | St. Albans | 2 | 1 | Slight |