Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sun 17 Jan 1999 | Merthyr Tydfil | 1 | 1 | Slight |
| Tue 19 Jan 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Wed 20 Jan 1999 | Cardiff | 2 | 1 | Slight |
| Sat 23 Jan 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Sat 30 Jan 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Thu 11 Feb 1999 | Merthyr Tydfil | 2 | 2 | Serious |
| Tue 2 Mar 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Thu 18 Mar 1999 | Merthyr Tydfil | 1 | 1 | Slight |
| Fri 26 Mar 1999 | Merthyr Tydfil | 1 | 1 | Slight |
| Wed 14 Apr 1999 | Cardiff | 1 | 1 | Serious |
| Mon 19 Apr 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Tue 18 May 1999 | Cardiff | 3 | 3 | Slight |
| Wed 19 May 1999 | Merthyr Tydfil | 2 | 2 | Slight |
| Thu 20 May 1999 | Merthyr Tydfil | 1 | 2 | Slight |
| Sun 23 May 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Mon 7 Jun 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Fri 11 Jun 1999 | Merthyr Tydfil | 1 | 1 | Slight |
| Sun 4 Jul 1999 | Merthyr Tydfil | 1 | 3 | Slight |
| Tue 6 Jul 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Sun 18 Jul 1999 | Merthyr Tydfil | 1 | 4 | Slight |
| Tue 20 Jul 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Wed 4 Aug 1999 | Rhondda, Cynon, Taff | 2 | 1 | Serious |
| Sun 8 Aug 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Thu 12 Aug 1999 | Rhondda, Cynon, Taff | 2 | 4 | Slight |
| Wed 8 Sep 1999 | Rhondda, Cynon, Taff | 1 | 2 | Slight |
| Mon 13 Sep 1999 | Merthyr Tydfil | 2 | 3 | Slight |
| Fri 8 Oct 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Mon 18 Oct 1999 | Merthyr Tydfil | 2 | 1 | Slight |
| Sat 23 Oct 1999 | Rhondda, Cynon, Taff | 2 | 4 | Slight |
| Thu 25 Nov 1999 | Merthyr Tydfil | 2 | 2 | Slight |
| Wed 8 Dec 1999 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Fri 10 Dec 1999 | Rhondda, Cynon, Taff | 2 | 4 | Slight |