Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 21 Jan 2012 | Watford | 3 | 2 | Serious |
| Tue 24 Jan 2012 | Hertsmere | 2 | 3 | Slight |
| Fri 27 Jan 2012 | Watford | 2 | 1 | Slight |
| Fri 27 Jan 2012 | Barnet | 2 | 1 | Serious |
| Mon 30 Jan 2012 | Watford | 2 | 1 | Slight |
| Mon 30 Jan 2012 | Barnet | 2 | 1 | Slight |
| Tue 31 Jan 2012 | Watford | 2 | 1 | Slight |
| Wed 1 Feb 2012 | Barnet | 2 | 1 | Slight |
| Thu 2 Feb 2012 | Watford | 2 | 1 | Slight |
| Thu 2 Feb 2012 | Watford | 2 | 1 | Slight |
| Sat 4 Feb 2012 | Watford | 2 | 1 | Slight |
| Sun 5 Feb 2012 | Watford | 1 | 1 | Slight |
| Sun 5 Feb 2012 | Watford | 1 | 1 | Slight |
| Tue 7 Feb 2012 | Watford | 4 | 2 | Slight |
| Thu 9 Feb 2012 | Watford | 2 | 1 | Slight |
| Tue 14 Feb 2012 | Watford | 2 | 1 | Slight |
| Tue 14 Feb 2012 | Watford | 2 | 1 | Slight |
| Thu 16 Feb 2012 | Barnet | 2 | 1 | Slight |
| Thu 23 Feb 2012 | Watford | 3 | 2 | Slight |
| Thu 23 Feb 2012 | Barnet | 2 | 1 | Slight |
| Wed 29 Feb 2012 | Hertsmere | 2 | 1 | Slight |
| Thu 1 Mar 2012 | Barnet | 2 | 2 | Slight |
| Thu 15 Mar 2012 | Watford | 2 | 1 | Slight |
| Fri 16 Mar 2012 | Watford | 2 | 1 | Slight |
| Fri 23 Mar 2012 | Watford | 2 | 2 | Slight |
| Tue 27 Mar 2012 | Three Rivers | 2 | 1 | Slight |
| Wed 28 Mar 2012 | Watford | 1 | 1 | Slight |
| Fri 6 Apr 2012 | Watford | 2 | 2 | Slight |
| Sun 15 Apr 2012 | Hertsmere | 3 | 2 | Slight |
| Wed 18 Apr 2012 | Watford | 3 | 1 | Slight |
| Tue 1 May 2012 | Barnet | 1 | 1 | Slight |
| Tue 15 May 2012 | Hertsmere | 1 | 1 | Slight |
| Thu 17 May 2012 | Barnet | 3 | 1 | Slight |
| Mon 21 May 2012 | Hertsmere | 1 | 1 | Slight |
| Wed 23 May 2012 | Hertsmere | 2 | 1 | Slight |
| Fri 25 May 2012 | Watford | 3 | 2 | Serious |
| Fri 25 May 2012 | Barnet | 2 | 1 | Slight |
| Sun 3 Jun 2012 | Watford | 1 | 1 | Slight |
| Tue 5 Jun 2012 | Watford | 2 | 2 | Slight |
| Sat 30 Jun 2012 | Barnet | 3 | 6 | Serious |
| Tue 10 Jul 2012 | Watford | 1 | 1 | Slight |
| Wed 11 Jul 2012 | Watford | 3 | 1 | Slight |
| Mon 16 Jul 2012 | Watford | 2 | 1 | Slight |
| Mon 16 Jul 2012 | Watford | 2 | 1 | Slight |
| Thu 19 Jul 2012 | Watford | 2 | 3 | Serious |
| Thu 19 Jul 2012 | Hertsmere | 2 | 3 | Serious |
| Sat 21 Jul 2012 | Watford | 2 | 1 | Slight |
| Sun 22 Jul 2012 | Hertsmere | 2 | 1 | Slight |
| Sun 29 Jul 2012 | Watford | 2 | 1 | Slight |
| Sun 29 Jul 2012 | Watford | 2 | 1 | Slight |
| Sat 4 Aug 2012 | Watford | 2 | 1 | Slight |
| Sat 4 Aug 2012 | Watford | 2 | 1 | Slight |
| Sun 5 Aug 2012 | Barnet | 1 | 1 | Slight |
| Tue 7 Aug 2012 | Hertsmere | 3 | 1 | Slight |
| Thu 9 Aug 2012 | Watford | 2 | 2 | Slight |
| Sun 19 Aug 2012 | Watford | 1 | 1 | Slight |
| Sun 19 Aug 2012 | Barnet | 1 | 1 | Slight |
| Wed 22 Aug 2012 | Barnet | 2 | 1 | Slight |
| Tue 28 Aug 2012 | Watford | 2 | 1 | Serious |
| Thu 30 Aug 2012 | Barnet | 1 | 1 | Serious |
| Thu 20 Sep 2012 | Watford | 2 | 1 | Slight |
| Fri 21 Sep 2012 | Barnet | 2 | 3 | Slight |
| Mon 24 Sep 2012 | Watford | 1 | 1 | Slight |
| Tue 25 Sep 2012 | Watford | 2 | 1 | Slight |
| Tue 25 Sep 2012 | Hertsmere | 3 | 1 | Slight |
| Tue 25 Sep 2012 | Watford | 3 | 1 | Slight |
| Tue 2 Oct 2012 | Watford | 3 | 2 | Slight |
| Tue 2 Oct 2012 | Watford | 3 | 2 | Slight |
| Wed 3 Oct 2012 | Barnet | 1 | 1 | Slight |
| Fri 5 Oct 2012 | Watford | 1 | 1 | Slight |
| Sat 6 Oct 2012 | Watford | 2 | 2 | Slight |
| Mon 8 Oct 2012 | Watford | 1 | 1 | Serious |
| Tue 16 Oct 2012 | Barnet | 2 | 1 | Slight |
| Thu 18 Oct 2012 | Hertsmere | 2 | 1 | Slight |
| Tue 23 Oct 2012 | Watford | 2 | 1 | Slight |
| Thu 25 Oct 2012 | Watford | 3 | 2 | Slight |
| Thu 25 Oct 2012 | Barnet | 2 | 1 | Slight |
| Tue 6 Nov 2012 | Watford | 3 | 1 | Slight |
| Fri 9 Nov 2012 | Watford | 1 | 1 | Slight |
| Sat 10 Nov 2012 | Watford | 2 | 1 | Slight |
| Mon 12 Nov 2012 | Watford | 2 | 1 | Slight |
| Thu 15 Nov 2012 | Watford | 2 | 1 | Slight |
| Mon 19 Nov 2012 | Hertsmere | 3 | 1 | Slight |
| Mon 19 Nov 2012 | Watford | 2 | 1 | Slight |
| Wed 21 Nov 2012 | Barnet | 1 | 1 | Serious |
| Wed 21 Nov 2012 | Barnet | 1 | 1 | Serious |
| Sat 24 Nov 2012 | Hertsmere | 2 | 3 | Slight |
| Wed 28 Nov 2012 | Watford | 2 | 2 | Slight |
| Thu 29 Nov 2012 | Watford | 2 | 2 | Slight |
| Sat 1 Dec 2012 | Watford | 1 | 1 | Fatal |
| Tue 4 Dec 2012 | Hertsmere | 2 | 1 | Slight |
| Tue 4 Dec 2012 | Hertsmere | 2 | 1 | Slight |
| Sun 9 Dec 2012 | Barnet | 2 | 2 | Slight |
| Tue 18 Dec 2012 | Watford | 2 | 1 | Slight |
| Fri 21 Dec 2012 | Watford | 2 | 1 | Slight |