Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sun 7 Mar 1999 | Gwynedd | 2 | 1 | Slight |
| Mon 8 Mar 1999 | Gwynedd | 2 | 1 | Slight |
| Sat 13 Mar 1999 | Gwynedd | 1 | 1 | Slight |
| Thu 18 Mar 1999 | Gwynedd | 1 | 2 | Slight |
| Thu 25 Mar 1999 | Gwynedd | 2 | 3 | Serious |
| Sun 28 Mar 1999 | Gwynedd | 2 | 1 | Slight |
| Sun 25 Apr 1999 | Gwynedd | 1 | 1 | Slight |
| Wed 28 Apr 1999 | Gwynedd | 1 | 1 | Slight |
| Sat 22 May 1999 | Gwynedd | 3 | 1 | Slight |
| Fri 28 May 1999 | Gwynedd | 1 | 1 | Slight |
| Fri 23 Jul 1999 | Gwynedd | 2 | 1 | Slight |
| Thu 29 Jul 1999 | Gwynedd | 2 | 1 | Slight |
| Mon 9 Aug 1999 | Gwynedd | 1 | 1 | Slight |
| Thu 19 Aug 1999 | Gwynedd | 2 | 1 | Slight |
| Thu 26 Aug 1999 | Gwynedd | 2 | 1 | Slight |
| Sat 28 Aug 1999 | Gwynedd | 1 | 1 | Slight |
| Fri 24 Sep 1999 | Gwynedd | 1 | 1 | Slight |
| Sun 24 Oct 1999 | Gwynedd | 1 | 1 | Slight |
| Fri 29 Oct 1999 | Gwynedd | 3 | 1 | Slight |
| Tue 9 Nov 1999 | Gwynedd | 2 | 1 | Slight |
| Wed 17 Nov 1999 | Gwynedd | 2 | 1 | Slight |
| Wed 17 Nov 1999 | Gwynedd | 2 | 1 | Slight |
| Sun 12 Dec 1999 | Gwynedd | 1 | 1 | Slight |
| Sun 12 Dec 1999 | Gwynedd | 1 | 1 | Slight |