Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 9 Jan 1999 | Gwynedd | 1 | 1 | Serious |
| Thu 14 Jan 1999 | Gwynedd | 1 | 1 | Slight |
| Tue 23 Feb 1999 | Gwynedd | 2 | 1 | Slight |
| Tue 16 Mar 1999 | Gwynedd | 2 | 4 | Fatal |
| Thu 8 Apr 1999 | Gwynedd | 3 | 1 | Slight |
| Wed 14 Apr 1999 | Gwynedd | 2 | 3 | Slight |
| Tue 20 Apr 1999 | Gwynedd | 1 | 1 | Slight |
| Thu 16 Sep 1999 | Gwynedd | 2 | 1 | Slight |
| Mon 27 Sep 1999 | Gwynedd | 4 | 3 | Slight |
| Fri 1 Oct 1999 | Gwynedd | 1 | 1 | Serious |
| Sat 2 Oct 1999 | Gwynedd | 3 | 1 | Serious |
| Sat 30 Oct 1999 | Gwynedd | 2 | 1 | Slight |
| Fri 12 Nov 1999 | Gwynedd | 2 | 2 | Slight |
| Sat 20 Nov 1999 | Gwynedd | 1 | 1 | Slight |
| Sat 27 Nov 1999 | Gwynedd | 2 | 2 | Slight |
| Tue 21 Dec 1999 | Gwynedd | 2 | 1 | Slight |