Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Thu 1 Jan 1998 | Flintshire | 1 | 1 | Slight |
| Fri 2 Jan 1998 | Flintshire | 2 | 1 | Slight |
| Mon 12 Jan 1998 | Denbighshire | 1 | 2 | Fatal |
| Wed 14 Jan 1998 | Flintshire | 3 | 1 | Slight |
| Fri 16 Jan 1998 | Flintshire | 2 | 1 | Slight |
| Sun 25 Jan 1998 | Denbighshire | 2 | 1 | Slight |
| Sat 31 Jan 1998 | Gwynedd | 1 | 2 | Slight |
| Wed 4 Feb 1998 | Flintshire | 4 | 1 | Slight |
| Mon 16 Feb 1998 | Denbighshire | 3 | 2 | Serious |
| Fri 20 Feb 1998 | Flintshire | 2 | 2 | Slight |
| Fri 27 Feb 1998 | Flintshire | 1 | 1 | Slight |
| Sat 28 Feb 1998 | Denbighshire | 1 | 1 | Slight |
| Sun 1 Mar 1998 | Denbighshire | 2 | 1 | Slight |
| Sun 1 Mar 1998 | Denbighshire | 2 | 1 | Slight |
| Tue 3 Mar 1998 | Denbighshire | 2 | 1 | Slight |
| Thu 5 Mar 1998 | Flintshire | 1 | 1 | Slight |
| Sun 8 Mar 1998 | Denbighshire | 2 | 4 | Slight |
| Tue 17 Mar 1998 | Flintshire | 1 | 1 | Serious |
| Sun 22 Mar 1998 | Gwynedd | 3 | 4 | Serious |
| Fri 27 Mar 1998 | Flintshire | 2 | 2 | Slight |
| Mon 30 Mar 1998 | Flintshire | 2 | 1 | Slight |
| Wed 1 Apr 1998 | Denbighshire | 2 | 2 | Slight |
| Wed 1 Apr 1998 | Flintshire | 2 | 1 | Slight |
| Thu 2 Apr 1998 | Denbighshire | 2 | 2 | Slight |
| Thu 16 Apr 1998 | Denbighshire | 2 | 8 | Slight |
| Sun 19 Apr 1998 | Denbighshire | 1 | 1 | Slight |
| Thu 23 Apr 1998 | Denbighshire | 2 | 2 | Slight |
| Tue 28 Apr 1998 | Flintshire | 3 | 1 | Slight |
| Tue 5 May 1998 | Gwynedd | 1 | 2 | Serious |
| Tue 5 May 1998 | Denbighshire | 2 | 1 | Slight |
| Thu 7 May 1998 | Denbighshire | 2 | 1 | Slight |
| Tue 12 May 1998 | Flintshire | 1 | 1 | Slight |
| Sun 17 May 1998 | Gwynedd | 1 | 1 | Serious |
| Sun 17 May 1998 | Gwynedd | 1 | 1 | Slight |
| Tue 26 May 1998 | Denbighshire | 1 | 1 | Fatal |
| Fri 29 May 1998 | Gwynedd | 2 | 3 | Slight |
| Tue 2 Jun 1998 | Denbighshire | 2 | 2 | Serious |
| Tue 2 Jun 1998 | Flintshire | 1 | 1 | Slight |
| Mon 8 Jun 1998 | Flintshire | 4 | 1 | Slight |
| Tue 9 Jun 1998 | Flintshire | 2 | 1 | Slight |
| Wed 10 Jun 1998 | Flintshire | 3 | 5 | Fatal |
| Thu 11 Jun 1998 | Denbighshire | 2 | 1 | Slight |
| Sat 13 Jun 1998 | Flintshire | 1 | 2 | Slight |
| Fri 19 Jun 1998 | Flintshire | 2 | 2 | Serious |
| Mon 22 Jun 1998 | Flintshire | 2 | 1 | Slight |
| Thu 2 Jul 1998 | Flintshire | 3 | 1 | Slight |
| Sun 5 Jul 1998 | Denbighshire | 2 | 1 | Slight |
| Tue 7 Jul 1998 | Flintshire | 2 | 2 | Slight |
| Sun 12 Jul 1998 | Denbighshire | 2 | 1 | Slight |
| Sun 19 Jul 1998 | Gwynedd | 1 | 1 | Slight |
| Sun 19 Jul 1998 | Flintshire | 1 | 1 | Slight |
| Tue 21 Jul 1998 | Gwynedd | 1 | 1 | Serious |
| Sun 26 Jul 1998 | Denbighshire | 1 | 5 | Serious |
| Fri 31 Jul 1998 | Denbighshire | 1 | 1 | Serious |
| Thu 6 Aug 1998 | Gwynedd | 1 | 1 | Slight |
| Fri 14 Aug 1998 | Denbighshire | 2 | 1 | Slight |
| Thu 20 Aug 1998 | Flintshire | 2 | 1 | Slight |
| Fri 21 Aug 1998 | Flintshire | 11 | 1 | Slight |
| Sun 23 Aug 1998 | Flintshire | 2 | 3 | Slight |
| Mon 31 Aug 1998 | Gwynedd | 2 | 1 | Serious |
| Wed 2 Sep 1998 | Denbighshire | 3 | 3 | Slight |
| Fri 4 Sep 1998 | Gwynedd | 2 | 1 | Slight |
| Wed 9 Sep 1998 | Flintshire | 4 | 1 | Slight |
| Wed 9 Sep 1998 | Flintshire | 1 | 1 | Slight |
| Fri 11 Sep 1998 | Gwynedd | 1 | 1 | Serious |
| Mon 28 Sep 1998 | Flintshire | 3 | 1 | Slight |
| Sun 18 Oct 1998 | Denbighshire | 2 | 1 | Slight |
| Fri 23 Oct 1998 | Gwynedd | 2 | 1 | Slight |
| Tue 27 Oct 1998 | Flintshire | 1 | 1 | Slight |
| Tue 27 Oct 1998 | Flintshire | 2 | 1 | Slight |
| Fri 20 Nov 1998 | Flintshire | 2 | 1 | Slight |
| Sun 22 Nov 1998 | Flintshire | 2 | 1 | Slight |
| Thu 3 Dec 1998 | Gwynedd | 2 | 1 | Slight |
| Thu 3 Dec 1998 | Flintshire | 4 | 2 | Slight |
| Mon 7 Dec 1998 | Flintshire | 2 | 1 | Slight |
| Tue 22 Dec 1998 | Denbighshire | 2 | 2 | Slight |
| Sat 26 Dec 1998 | Flintshire | 3 | 1 | Slight |
| Sat 26 Dec 1998 | Flintshire | 2 | 1 | Slight |
| Sat 26 Dec 1998 | Flintshire | 2 | 1 | Slight |
| Sun 27 Dec 1998 | Flintshire | 1 | 1 | Slight |