Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sun 3 Jan 1999 | Caerphilly | 2 | 3 | Serious |
| Tue 5 Jan 1999 | Caerphilly | 4 | 1 | Slight |
| Thu 14 Jan 1999 | Caerphilly | 2 | 1 | Slight |
| Tue 19 Jan 1999 | Caerphilly | 1 | 1 | Serious |
| Fri 29 Jan 1999 | Blaenau Gwent | 1 | 1 | Slight |
| Mon 1 Feb 1999 | Caerphilly | 2 | 2 | Slight |
| Fri 19 Feb 1999 | Caerphilly | 1 | 1 | Slight |
| Wed 24 Feb 1999 | Caerphilly | 3 | 2 | Slight |
| Mon 1 Mar 1999 | Blaenau Gwent | 2 | 1 | Slight |
| Tue 9 Mar 1999 | Caerphilly | 2 | 2 | Slight |
| Wed 24 Mar 1999 | Caerphilly | 3 | 2 | Slight |
| Thu 15 Apr 1999 | Caerphilly | 1 | 1 | Slight |
| Mon 19 Apr 1999 | Blaenau Gwent | 2 | 2 | Slight |
| Tue 27 Apr 1999 | Caerphilly | 1 | 1 | Slight |
| Thu 29 Apr 1999 | Caerphilly | 1 | 1 | Slight |
| Thu 6 May 1999 | Caerphilly | 2 | 2 | Slight |
| Tue 25 May 1999 | Caerphilly | 2 | 1 | Slight |
| Thu 27 May 1999 | Blaenau Gwent | 2 | 2 | Slight |
| Thu 27 May 1999 | Caerphilly | 1 | 1 | Slight |
| Fri 11 Jun 1999 | Caerphilly | 2 | 3 | Slight |
| Wed 23 Jun 1999 | Caerphilly | 2 | 1 | Slight |
| Mon 28 Jun 1999 | Caerphilly | 1 | 1 | Serious |
| Wed 30 Jun 1999 | Caerphilly | 1 | 1 | Slight |
| Mon 5 Jul 1999 | Caerphilly | 4 | 2 | Slight |
| Tue 6 Jul 1999 | Caerphilly | 2 | 3 | Slight |
| Fri 9 Jul 1999 | Caerphilly | 2 | 2 | Slight |
| Wed 14 Jul 1999 | Caerphilly | 1 | 1 | Slight |
| Wed 14 Jul 1999 | Caerphilly | 2 | 3 | Slight |
| Tue 27 Jul 1999 | Blaenau Gwent | 2 | 1 | Slight |
| Wed 28 Jul 1999 | Caerphilly | 2 | 1 | Slight |
| Fri 30 Jul 1999 | Caerphilly | 2 | 1 | Slight |
| Tue 10 Aug 1999 | Caerphilly | 2 | 2 | Serious |
| Tue 31 Aug 1999 | Caerphilly | 2 | 1 | Slight |
| Tue 31 Aug 1999 | Caerphilly | 1 | 1 | Slight |
| Wed 1 Sep 1999 | Blaenau Gwent | 2 | 1 | Slight |
| Sat 4 Sep 1999 | Caerphilly | 2 | 1 | Slight |
| Mon 6 Sep 1999 | Caerphilly | 2 | 1 | Slight |
| Mon 6 Sep 1999 | Caerphilly | 2 | 3 | Slight |
| Mon 27 Sep 1999 | Caerphilly | 2 | 2 | Slight |
| Wed 29 Sep 1999 | Caerphilly | 1 | 1 | Slight |
| Sat 2 Oct 1999 | Blaenau Gwent | 1 | 2 | Slight |
| Sun 17 Oct 1999 | Blaenau Gwent | 2 | 1 | Slight |
| Sun 31 Oct 1999 | Caerphilly | 2 | 1 | Slight |
| Thu 18 Nov 1999 | Caerphilly | 1 | 1 | Slight |
| Thu 2 Dec 1999 | Blaenau Gwent | 2 | 3 | Slight |
| Mon 6 Dec 1999 | Blaenau Gwent | 1 | 1 | Slight |
| Tue 7 Dec 1999 | Caerphilly | 4 | 5 | Slight |
| Mon 13 Dec 1999 | Blaenau Gwent | 2 | 2 | Slight |
| Thu 16 Dec 1999 | Caerphilly | 1 | 1 | Slight |
| Thu 23 Dec 1999 | Caerphilly | 3 | 1 | Slight |