Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 7 Jan 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 9 Jan 2011 | Welwyn Hatfield | 1 | 1 | Serious |
| Sun 9 Jan 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 9 Jan 2011 | Hertsmere | 4 | 1 | Fatal |
| Thu 13 Jan 2011 | Barnet | 1 | 1 | Slight |
| Fri 14 Jan 2011 | Barnet | 2 | 1 | Slight |
| Sat 15 Jan 2011 | Barnet | 2 | 1 | Slight |
| Sat 15 Jan 2011 | Barnet | 2 | 1 | Slight |
| Tue 18 Jan 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 18 Jan 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 18 Jan 2011 | Barnet | 2 | 2 | Slight |
| Wed 19 Jan 2011 | Barnet | 2 | 1 | Slight |
| Thu 20 Jan 2011 | Barnet | 3 | 1 | Slight |
| Thu 20 Jan 2011 | Barnet | 2 | 1 | Slight |
| Fri 21 Jan 2011 | Hertsmere | 2 | 1 | Slight |
| Sat 22 Jan 2011 | Welwyn Hatfield | 2 | 3 | Slight |
| Wed 26 Jan 2011 | Barnet | 3 | 1 | Slight |
| Sun 30 Jan 2011 | Barnet | 1 | 1 | Serious |
| Mon 31 Jan 2011 | Barnet | 2 | 4 | Serious |
| Tue 1 Feb 2011 | Hertsmere | 2 | 1 | Slight |
| Tue 1 Feb 2011 | Barnet | 2 | 1 | Slight |
| Wed 2 Feb 2011 | Barnet | 1 | 1 | Slight |
| Wed 2 Feb 2011 | Barnet | 3 | 1 | Slight |
| Wed 2 Feb 2011 | Barnet | 3 | 1 | Slight |
| Fri 4 Feb 2011 | Barnet | 2 | 2 | Slight |
| Sat 5 Feb 2011 | Hertsmere | 3 | 1 | Slight |
| Tue 8 Feb 2011 | Barnet | 2 | 2 | Slight |
| Thu 10 Feb 2011 | Barnet | 2 | 1 | Slight |
| Fri 18 Feb 2011 | Barnet | 2 | 1 | Slight |
| Fri 18 Feb 2011 | Barnet | 2 | 1 | Slight |
| Tue 1 Mar 2011 | Barnet | 2 | 1 | Slight |
| Sun 6 Mar 2011 | Barnet | 2 | 1 | Slight |
| Thu 10 Mar 2011 | Barnet | 1 | 1 | Slight |
| Thu 10 Mar 2011 | Barnet | 2 | 1 | Serious |
| Sat 12 Mar 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 12 Mar 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Mon 14 Mar 2011 | Barnet | 2 | 1 | Slight |
| Mon 14 Mar 2011 | Barnet | 1 | 1 | Slight |
| Mon 14 Mar 2011 | Barnet | 3 | 1 | Slight |
| Tue 15 Mar 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 19 Mar 2011 | Haringey | 1 | 1 | Slight |
| Wed 23 Mar 2011 | Barnet | 2 | 1 | Slight |
| Wed 23 Mar 2011 | Barnet | 2 | 1 | Slight |
| Wed 23 Mar 2011 | Barnet | 1 | 1 | Slight |
| Wed 23 Mar 2011 | Haringey | 2 | 1 | Slight |
| Fri 25 Mar 2011 | Hertsmere | 2 | 2 | Slight |
| Sat 26 Mar 2011 | Barnet | 2 | 1 | Slight |
| Sun 27 Mar 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Mon 4 Apr 2011 | Barnet | 2 | 2 | Slight |
| Fri 15 Apr 2011 | Barnet | 2 | 1 | Slight |
| Tue 19 Apr 2011 | Barnet | 1 | 1 | Slight |
| Wed 20 Apr 2011 | Barnet | 1 | 1 | Fatal |
| Thu 21 Apr 2011 | Barnet | 2 | 2 | Slight |
| Wed 27 Apr 2011 | Barnet | 2 | 1 | Slight |
| Wed 27 Apr 2011 | Barnet | 2 | 1 | Slight |
| Wed 27 Apr 2011 | Barnet | 2 | 1 | Slight |
| Fri 29 Apr 2011 | Barnet | 1 | 1 | Slight |
| Sun 1 May 2011 | Barnet | 1 | 1 | Slight |
| Sun 1 May 2011 | Barnet | 1 | 1 | Slight |
| Sun 1 May 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Sun 1 May 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Fri 6 May 2011 | Barnet | 2 | 1 | Slight |
| Sat 7 May 2011 | Barnet | 2 | 1 | Slight |
| Sat 7 May 2011 | Barnet | 2 | 1 | Slight |
| Tue 10 May 2011 | Barnet | 1 | 1 | Serious |
| Tue 10 May 2011 | Barnet | 1 | 1 | Slight |
| Tue 10 May 2011 | Barnet | 2 | 1 | Slight |
| Tue 10 May 2011 | Barnet | 2 | 1 | Serious |
| Fri 13 May 2011 | Barnet | 2 | 1 | Serious |
| Sun 15 May 2011 | Barnet | 2 | 1 | Slight |
| Tue 17 May 2011 | Barnet | 2 | 1 | Slight |
| Fri 20 May 2011 | Barnet | 1 | 1 | Slight |
| Mon 23 May 2011 | Welwyn Hatfield | 5 | 4 | Slight |
| Tue 24 May 2011 | Barnet | 2 | 1 | Slight |
| Wed 25 May 2011 | Barnet | 2 | 1 | Slight |
| Thu 26 May 2011 | Barnet | 1 | 1 | Serious |
| Sat 4 Jun 2011 | Barnet | 1 | 1 | Slight |
| Mon 6 Jun 2011 | Welwyn Hatfield | 4 | 1 | Slight |
| Thu 9 Jun 2011 | Barnet | 1 | 1 | Slight |
| Thu 9 Jun 2011 | Barnet | 2 | 1 | Slight |
| Sat 11 Jun 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 14 Jun 2011 | Barnet | 2 | 1 | Slight |
| Sun 19 Jun 2011 | Barnet | 2 | 2 | Slight |
| Sat 25 Jun 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 25 Jun 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 25 Jun 2011 | Barnet | 1 | 2 | Slight |
| Mon 27 Jun 2011 | Barnet | 2 | 1 | Serious |
| Thu 30 Jun 2011 | Barnet | 2 | 1 | Slight |
| Thu 30 Jun 2011 | Barnet | 2 | 1 | Slight |
| Fri 1 Jul 2011 | Barnet | 2 | 1 | Slight |
| Fri 1 Jul 2011 | Barnet | 2 | 1 | Slight |
| Sun 3 Jul 2011 | Barnet | 2 | 1 | Slight |
| Mon 4 Jul 2011 | Barnet | 1 | 1 | Slight |
| Mon 4 Jul 2011 | Barnet | 1 | 1 | Slight |
| Sat 9 Jul 2011 | Barnet | 2 | 2 | Slight |
| Sat 9 Jul 2011 | Barnet | 2 | 2 | Slight |
| Fri 15 Jul 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 16 Jul 2011 | Welwyn Hatfield | 2 | 3 | Slight |
| Sat 16 Jul 2011 | Welwyn Hatfield | 2 | 3 | Slight |
| Tue 19 Jul 2011 | Barnet | 1 | 1 | Serious |
| Thu 21 Jul 2011 | Barnet | 2 | 2 | Slight |
| Mon 25 Jul 2011 | Welwyn Hatfield | 3 | 2 | Slight |
| Tue 2 Aug 2011 | Barnet | 2 | 1 | Slight |
| Thu 4 Aug 2011 | Barnet | 1 | 1 | Slight |
| Fri 5 Aug 2011 | Hertsmere | 2 | 1 | Serious |
| Fri 5 Aug 2011 | Haringey | 1 | 1 | Slight |
| Sat 6 Aug 2011 | Barnet | 2 | 1 | Slight |
| Mon 8 Aug 2011 | Welwyn Hatfield | 1 | 1 | Slight |
| Mon 8 Aug 2011 | Barnet | 2 | 1 | Slight |
| Mon 15 Aug 2011 | Barnet | 2 | 1 | Slight |
| Mon 15 Aug 2011 | Barnet | 1 | 1 | Slight |
| Mon 15 Aug 2011 | Welwyn Hatfield | 2 | 1 | Serious |
| Thu 18 Aug 2011 | Barnet | 2 | 2 | Slight |
| Fri 19 Aug 2011 | Hertsmere | 2 | 1 | Slight |
| Sat 20 Aug 2011 | Barnet | 2 | 1 | Slight |
| Sun 21 Aug 2011 | Barnet | 2 | 1 | Slight |
| Thu 25 Aug 2011 | Hertsmere | 2 | 1 | Slight |
| Thu 25 Aug 2011 | Barnet | 1 | 1 | Slight |
| Fri 2 Sep 2011 | Welwyn Hatfield | 2 | 2 | Slight |
| Sat 3 Sep 2011 | Barnet | 2 | 1 | Slight |
| Sat 3 Sep 2011 | Hertsmere | 2 | 1 | Slight |
| Sat 10 Sep 2011 | Barnet | 1 | 1 | Slight |
| Wed 14 Sep 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 14 Sep 2011 | Barnet | 1 | 1 | Serious |
| Mon 19 Sep 2011 | Barnet | 1 | 1 | Slight |
| Tue 20 Sep 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 23 Sep 2011 | Hertsmere | 2 | 1 | Slight |
| Mon 26 Sep 2011 | Barnet | 2 | 1 | Slight |
| Tue 27 Sep 2011 | Barnet | 2 | 1 | Slight |
| Sat 1 Oct 2011 | Barnet | 1 | 1 | Slight |
| Mon 3 Oct 2011 | Barnet | 1 | 1 | Slight |
| Fri 7 Oct 2011 | Barnet | 2 | 1 | Slight |
| Fri 7 Oct 2011 | Barnet | 3 | 1 | Slight |
| Sun 9 Oct 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 9 Oct 2011 | Barnet | 1 | 1 | Serious |
| Sun 9 Oct 2011 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 25 Oct 2011 | Barnet | 2 | 1 | Slight |
| Tue 25 Oct 2011 | Barnet | 2 | 1 | Slight |
| Wed 26 Oct 2011 | Barnet | 1 | 1 | Slight |
| Wed 26 Oct 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 29 Oct 2011 | Barnet | 2 | 1 | Slight |
| Wed 2 Nov 2011 | Barnet | 2 | 1 | Slight |
| Thu 3 Nov 2011 | Barnet | 2 | 2 | Slight |
| Sat 5 Nov 2011 | Barnet | 2 | 1 | Slight |
| Mon 7 Nov 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 12 Nov 2011 | Barnet | 2 | 1 | Slight |
| Sat 12 Nov 2011 | Welwyn Hatfield | 1 | 2 | Slight |
| Sat 12 Nov 2011 | Welwyn Hatfield | 1 | 2 | Slight |
| Tue 15 Nov 2011 | Barnet | 1 | 1 | Slight |
| Fri 18 Nov 2011 | Welwyn Hatfield | 2 | 2 | Slight |
| Fri 18 Nov 2011 | Barnet | 2 | 1 | Slight |
| Wed 23 Nov 2011 | Barnet | 2 | 1 | Slight |
| Tue 29 Nov 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 29 Nov 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 4 Dec 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Sun 4 Dec 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Tue 6 Dec 2011 | Barnet | 1 | 1 | Slight |
| Sat 10 Dec 2011 | Barnet | 1 | 1 | Slight |
| Wed 14 Dec 2011 | Barnet | 2 | 2 | Slight |
| Fri 16 Dec 2011 | Welwyn Hatfield | 2 | 1 | Slight |
| Fri 16 Dec 2011 | Barnet | 2 | 1 | Slight |
| Sat 17 Dec 2011 | Barnet | 2 | 1 | Slight |
| Sat 24 Dec 2011 | Barnet | 2 | 1 | Slight |
| Fri 30 Dec 2011 | Barnet | 2 | 5 | Slight |