Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 2 Jan 1998 | Rhondda, Cynon, Taff | 2 | 1 | Serious |
| Thu 15 Jan 1998 | Rhondda, Cynon, Taff | 2 | 2 | Slight |
| Thu 22 Jan 1998 | Cardiff | 2 | 2 | Slight |
| Tue 27 Jan 1998 | Cardiff | 3 | 2 | Slight |
| Mon 9 Feb 1998 | Rhondda, Cynon, Taff | 3 | 2 | Slight |
| Fri 13 Feb 1998 | Rhondda, Cynon, Taff | 4 | 2 | Slight |
| Sun 22 Feb 1998 | Cardiff | 2 | 4 | Slight |
| Fri 6 Mar 1998 | Cardiff | 2 | 2 | Slight |
| Sat 7 Mar 1998 | Rhondda, Cynon, Taff | 3 | 1 | Slight |
| Sun 22 Mar 1998 | Rhondda, Cynon, Taff | 1 | 4 | Serious |
| Fri 27 Mar 1998 | Rhondda, Cynon, Taff | 1 | 1 | Serious |
| Mon 20 Apr 1998 | Cardiff | 3 | 3 | Serious |
| Mon 20 Apr 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Fri 24 Apr 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Sun 26 Apr 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Wed 29 Apr 1998 | Cardiff | 2 | 1 | Slight |
| Thu 14 May 1998 | Cardiff | 2 | 5 | Slight |
| Fri 15 May 1998 | Rhondda, Cynon, Taff | 2 | 4 | Slight |
| Fri 22 May 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Mon 25 May 1998 | Cardiff | 1 | 5 | Serious |
| Tue 26 May 1998 | Rhondda, Cynon, Taff | 2 | 2 | Slight |
| Fri 12 Jun 1998 | Cardiff | 2 | 1 | Slight |
| Wed 24 Jun 1998 | Rhondda, Cynon, Taff | 1 | 2 | Slight |
| Wed 24 Jun 1998 | Rhondda, Cynon, Taff | 3 | 1 | Slight |
| Fri 26 Jun 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Sat 27 Jun 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Tue 7 Jul 1998 | Rhondda, Cynon, Taff | 1 | 4 | Fatal |
| Tue 7 Jul 1998 | Rhondda, Cynon, Taff | 3 | 2 | Slight |
| Thu 9 Jul 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Mon 20 Jul 1998 | Cardiff | 1 | 1 | Slight |
| Thu 13 Aug 1998 | Cardiff | 2 | 4 | Slight |
| Sat 22 Aug 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Mon 31 Aug 1998 | Cardiff | 2 | 1 | Slight |
| Tue 1 Sep 1998 | Cardiff | 3 | 1 | Slight |
| Sat 5 Sep 1998 | Cardiff | 1 | 1 | Slight |
| Wed 9 Sep 1998 | Cardiff | 2 | 2 | Fatal |
| Thu 10 Sep 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Sun 20 Sep 1998 | Cardiff | 2 | 1 | Serious |
| Wed 23 Sep 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Sun 11 Oct 1998 | Cardiff | 2 | 1 | Slight |
| Mon 19 Oct 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Tue 20 Oct 1998 | Cardiff | 2 | 1 | Slight |
| Fri 30 Oct 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Sun 15 Nov 1998 | Cardiff | 2 | 1 | Slight |
| Sat 28 Nov 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |
| Sat 28 Nov 1998 | Rhondda, Cynon, Taff | 2 | 3 | Serious |
| Sun 29 Nov 1998 | Cardiff | 2 | 3 | Fatal |
| Sun 6 Dec 1998 | Rhondda, Cynon, Taff | 1 | 1 | Slight |
| Mon 14 Dec 1998 | Rhondda, Cynon, Taff | 1 | 1 | Fatal |
| Fri 18 Dec 1998 | Rhondda, Cynon, Taff | 2 | 1 | Slight |