Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Tue 12 Jan 1999 | Gwynedd | 3 | 1 | Slight |
| Fri 15 Jan 1999 | Gwynedd | 1 | 1 | Slight |
| Fri 26 Feb 1999 | Gwynedd | 2 | 1 | Slight |
| Thu 4 Mar 1999 | Gwynedd | 2 | 1 | Slight |
| Sat 13 Mar 1999 | Gwynedd | 2 | 4 | Slight |
| Sat 10 Apr 1999 | Gwynedd | 2 | 1 | Slight |
| Fri 30 Apr 1999 | Gwynedd | 2 | 1 | Slight |
| Sat 15 May 1999 | Gwynedd | 1 | 2 | Slight |
| Wed 30 Jun 1999 | Gwynedd | 1 | 1 | Slight |
| Sat 3 Jul 1999 | Gwynedd | 1 | 1 | Slight |
| Sun 25 Jul 1999 | Gwynedd | 2 | 4 | Slight |
| Sun 19 Sep 1999 | Gwynedd | 3 | 1 | Slight |
| Tue 21 Sep 1999 | Gwynedd | 2 | 2 | Slight |
| Sun 26 Sep 1999 | Gwynedd | 1 | 1 | Slight |
| Wed 29 Sep 1999 | Gwynedd | 2 | 1 | Slight |
| Wed 27 Oct 1999 | Gwynedd | 2 | 1 | Slight |
| Fri 5 Nov 1999 | Gwynedd | 2 | 3 | Slight |
| Fri 10 Dec 1999 | Gwynedd | 2 | 1 | Fatal |
| Fri 10 Dec 1999 | Wrexham | 3 | 1 | Slight |
| Wed 22 Dec 1999 | Gwynedd | 2 | 1 | Slight |
| Thu 23 Dec 1999 | Gwynedd | 2 | 2 | Slight |