Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 14 Jan 1999 | Gwynedd | 1 | 1 | Serious |
| Wed 20 Jan 1999 | Gwynedd | 1 | 1 | Slight |
| Wed 14 Apr 1999 | Gwynedd | 2 | 1 | Slight |
| Tue 20 Apr 1999 | Gwynedd | 2 | 1 | Slight |
| Thu 13 May 1999 | Gwynedd | 2 | 2 | Slight |
| Sun 27 Jun 1999 | Gwynedd | 2 | 1 | Slight |
| Mon 26 Jul 1999 | Gwynedd | 1 | 1 | Slight |
| Mon 9 Aug 1999 | Gwynedd | 3 | 4 | Slight |
| Mon 11 Oct 1999 | Gwynedd | 2 | 1 | Slight |
| Wed 13 Oct 1999 | Gwynedd | 2 | 1 | Slight |
| Sat 23 Oct 1999 | Gwynedd | 2 | 4 | Slight |
| Mon 15 Nov 1999 | Gwynedd | 2 | 2 | Slight |
| Thu 25 Nov 1999 | Gwynedd | 2 | 3 | Slight |
| Sat 4 Dec 1999 | Gwynedd | 3 | 1 | Fatal |