Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 4 Jan 2003 | Cardiff | 1 | 1 | Slight |
| Sun 5 Jan 2003 | Caerphilly | 1 | 2 | Slight |
| Mon 6 Jan 2003 | Caerphilly | 7 | 4 | Slight |
| Sat 11 Jan 2003 | Cardiff | 3 | 3 | Slight |
| Thu 16 Jan 2003 | Cardiff | 2 | 1 | Slight |
| Sat 18 Jan 2003 | Caerphilly | 1 | 1 | Slight |
| Fri 31 Jan 2003 | Caerphilly | 3 | 1 | Slight |
| Fri 7 Feb 2003 | Cardiff | 2 | 1 | Slight |
| Tue 11 Feb 2003 | Cardiff | 3 | 1 | Slight |
| Fri 14 Feb 2003 | Cardiff | 2 | 1 | Slight |
| Sat 22 Feb 2003 | Caerphilly | 1 | 1 | Slight |
| Mon 24 Feb 2003 | Caerphilly | 1 | 2 | Slight |
| Tue 25 Feb 2003 | Cardiff | 2 | 1 | Slight |
| Sun 2 Mar 2003 | Caerphilly | 2 | 1 | Serious |
| Wed 12 Mar 2003 | Cardiff | 2 | 1 | Slight |
| Fri 14 Mar 2003 | Cardiff | 3 | 1 | Slight |
| Fri 14 Mar 2003 | Cardiff | 1 | 1 | Slight |
| Sat 15 Mar 2003 | Cardiff | 1 | 1 | Serious |
| Sun 16 Mar 2003 | Caerphilly | 2 | 2 | Slight |
| Mon 17 Mar 2003 | Caerphilly | 2 | 3 | Serious |
| Mon 24 Mar 2003 | Cardiff | 2 | 1 | Slight |
| Wed 26 Mar 2003 | Cardiff | 4 | 1 | Slight |
| Fri 28 Mar 2003 | Cardiff | 2 | 1 | Slight |
| Tue 1 Apr 2003 | Caerphilly | 2 | 2 | Slight |
| Wed 2 Apr 2003 | Cardiff | 3 | 1 | Slight |
| Fri 4 Apr 2003 | Caerphilly | 3 | 1 | Slight |
| Thu 10 Apr 2003 | Caerphilly | 2 | 2 | Slight |
| Mon 14 Apr 2003 | Caerphilly | 2 | 2 | Slight |
| Mon 14 Apr 2003 | Caerphilly | 2 | 2 | Slight |
| Tue 22 Apr 2003 | Caerphilly | 3 | 2 | Slight |
| Mon 28 Apr 2003 | Cardiff | 2 | 1 | Slight |
| Tue 6 May 2003 | Caerphilly | 1 | 1 | Slight |
| Wed 7 May 2003 | Caerphilly | 2 | 2 | Slight |
| Thu 8 May 2003 | Cardiff | 1 | 2 | Slight |
| Fri 9 May 2003 | Cardiff | 2 | 1 | Slight |
| Fri 9 May 2003 | Caerphilly | 2 | 2 | Slight |
| Mon 19 May 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 21 May 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 21 May 2003 | Caerphilly | 3 | 3 | Slight |
| Sat 31 May 2003 | Caerphilly | 1 | 1 | Slight |
| Sat 31 May 2003 | Caerphilly | 2 | 4 | Slight |
| Tue 3 Jun 2003 | Cardiff | 2 | 2 | Slight |
| Fri 6 Jun 2003 | Caerphilly | 3 | 1 | Slight |
| Fri 6 Jun 2003 | Cardiff | 2 | 2 | Slight |
| Fri 6 Jun 2003 | Caerphilly | 2 | 2 | Slight |
| Sat 7 Jun 2003 | Cardiff | 2 | 1 | Slight |
| Thu 19 Jun 2003 | Caerphilly | 2 | 2 | Slight |
| Fri 27 Jun 2003 | Cardiff | 1 | 1 | Serious |
| Tue 1 Jul 2003 | Cardiff | 2 | 1 | Slight |
| Mon 7 Jul 2003 | Caerphilly | 2 | 2 | Slight |
| Tue 22 Jul 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 23 Jul 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 31 Jul 2003 | Cardiff | 3 | 2 | Slight |
| Fri 1 Aug 2003 | Caerphilly | 2 | 1 | Slight |
| Mon 11 Aug 2003 | Cardiff | 3 | 1 | Slight |
| Fri 15 Aug 2003 | Caerphilly | 1 | 1 | Serious |
| Sat 30 Aug 2003 | Caerphilly | 2 | 1 | Slight |
| Tue 2 Sep 2003 | Caerphilly | 2 | 1 | Slight |
| Tue 2 Sep 2003 | Cardiff | 2 | 1 | Slight |
| Thu 4 Sep 2003 | Caerphilly | 2 | 1 | Slight |
| Fri 12 Sep 2003 | Caerphilly | 2 | 4 | Slight |
| Sun 14 Sep 2003 | Caerphilly | 2 | 2 | Slight |
| Sun 14 Sep 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 18 Sep 2003 | Caerphilly | 2 | 1 | Slight |
| Fri 19 Sep 2003 | Caerphilly | 2 | 3 | Slight |
| Mon 29 Sep 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 2 Oct 2003 | Cardiff | 3 | 2 | Slight |
| Tue 7 Oct 2003 | Caerphilly | 1 | 1 | Slight |
| Thu 9 Oct 2003 | Cardiff | 2 | 1 | Slight |
| Sat 11 Oct 2003 | Cardiff | 1 | 1 | Slight |
| Tue 14 Oct 2003 | Cardiff | 2 | 1 | Slight |
| Fri 17 Oct 2003 | Caerphilly | 1 | 2 | Slight |
| Tue 28 Oct 2003 | Cardiff | 1 | 1 | Slight |
| Wed 29 Oct 2003 | Caerphilly | 2 | 3 | Slight |
| Thu 30 Oct 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 30 Oct 2003 | Caerphilly | 2 | 1 | Slight |
| Sun 2 Nov 2003 | Cardiff | 2 | 2 | Slight |
| Mon 10 Nov 2003 | Cardiff | 2 | 1 | Slight |
| Wed 12 Nov 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 12 Nov 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 13 Nov 2003 | Caerphilly | 2 | 2 | Slight |
| Fri 14 Nov 2003 | Cardiff | 2 | 1 | Slight |
| Thu 20 Nov 2003 | Caerphilly | 2 | 1 | Slight |
| Fri 21 Nov 2003 | Cardiff | 1 | 1 | Slight |
| Sun 23 Nov 2003 | Cardiff | 2 | 1 | Slight |
| Wed 26 Nov 2003 | Caerphilly | 1 | 1 | Slight |
| Wed 26 Nov 2003 | Caerphilly | 2 | 1 | Slight |
| Thu 27 Nov 2003 | Cardiff | 1 | 1 | Slight |
| Mon 1 Dec 2003 | Cardiff | 2 | 1 | Slight |
| Mon 1 Dec 2003 | Cardiff | 2 | 1 | Slight |
| Tue 2 Dec 2003 | Caerphilly | 2 | 1 | Slight |
| Sun 7 Dec 2003 | Caerphilly | 1 | 1 | Slight |
| Sun 7 Dec 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 10 Dec 2003 | Cardiff | 3 | 1 | Slight |
| Thu 11 Dec 2003 | Cardiff | 4 | 2 | Slight |
| Sun 14 Dec 2003 | Cardiff | 2 | 1 | Slight |
| Mon 15 Dec 2003 | Cardiff | 2 | 1 | Slight |
| Tue 16 Dec 2003 | Caerphilly | 2 | 1 | Slight |
| Wed 17 Dec 2003 | Caerphilly | 2 | 1 | Slight |
| Fri 19 Dec 2003 | Caerphilly | 1 | 1 | Slight |
| Sat 20 Dec 2003 | Caerphilly | 3 | 2 | Slight |
| Sat 20 Dec 2003 | Cardiff | 1 | 1 | Slight |
| Fri 26 Dec 2003 | Cardiff | 2 | 1 | Slight |