Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Tue 5 Jan 1999 | Wrexham | 1 | 1 | Slight |
| Wed 6 Jan 1999 | Flintshire | 2 | 1 | Slight |
| Fri 8 Jan 1999 | Flintshire | 3 | 2 | Slight |
| Sat 9 Jan 1999 | Flintshire | 2 | 1 | Slight |
| Mon 11 Jan 1999 | Wrexham | 2 | 3 | Serious |
| Tue 12 Jan 1999 | Flintshire | 1 | 1 | Slight |
| Tue 12 Jan 1999 | Wrexham | 2 | 1 | Serious |
| Thu 14 Jan 1999 | Flintshire | 2 | 1 | Slight |
| Fri 15 Jan 1999 | Wrexham | 2 | 7 | Serious |
| Mon 18 Jan 1999 | Wrexham | 2 | 1 | Slight |
| Mon 18 Jan 1999 | Wrexham | 2 | 1 | Slight |
| Thu 21 Jan 1999 | Flintshire | 2 | 1 | Slight |
| Sat 23 Jan 1999 | Wrexham | 1 | 1 | Slight |
| Mon 25 Jan 1999 | Flintshire | 2 | 1 | Slight |
| Thu 28 Jan 1999 | Flintshire | 3 | 1 | Slight |
| Fri 29 Jan 1999 | Flintshire | 2 | 2 | Slight |
| Wed 3 Feb 1999 | Wrexham | 2 | 2 | Slight |
| Thu 4 Feb 1999 | Denbighshire | 2 | 1 | Slight |
| Sat 13 Feb 1999 | Wrexham | 2 | 1 | Slight |
| Mon 15 Feb 1999 | Wrexham | 2 | 1 | Slight |
| Tue 16 Feb 1999 | Flintshire | 3 | 2 | Fatal |
| Wed 17 Feb 1999 | Wrexham | 2 | 2 | Serious |
| Mon 22 Feb 1999 | Flintshire | 1 | 1 | Serious |
| Mon 22 Feb 1999 | Wrexham | 2 | 1 | Slight |
| Fri 26 Feb 1999 | Wrexham | 2 | 1 | Slight |
| Sun 28 Feb 1999 | Denbighshire | 2 | 1 | Slight |
| Sun 28 Feb 1999 | Flintshire | 2 | 2 | Slight |
| Mon 1 Mar 1999 | Flintshire | 2 | 2 | Slight |
| Fri 12 Mar 1999 | Wrexham | 2 | 1 | Slight |
| Wed 17 Mar 1999 | Denbighshire | 2 | 1 | Fatal |
| Sun 21 Mar 1999 | Flintshire | 1 | 3 | Serious |
| Mon 22 Mar 1999 | Flintshire | 2 | 1 | Slight |
| Thu 25 Mar 1999 | Flintshire | 3 | 1 | Slight |
| Thu 25 Mar 1999 | Flintshire | 2 | 1 | Slight |
| Thu 25 Mar 1999 | Wrexham | 2 | 1 | Slight |
| Sat 27 Mar 1999 | Wrexham | 2 | 1 | Slight |
| Fri 2 Apr 1999 | Wrexham | 2 | 2 | Serious |
| Sun 4 Apr 1999 | Flintshire | 1 | 1 | Serious |
| Tue 6 Apr 1999 | Flintshire | 1 | 1 | Slight |
| Sat 10 Apr 1999 | Wrexham | 1 | 2 | Slight |
| Tue 13 Apr 1999 | Wrexham | 2 | 2 | Slight |
| Sun 25 Apr 1999 | Wrexham | 3 | 1 | Slight |
| Fri 30 Apr 1999 | Flintshire | 3 | 1 | Slight |
| Sat 1 May 1999 | Flintshire | 2 | 1 | Slight |
| Fri 7 May 1999 | Wrexham | 2 | 1 | Slight |
| Fri 7 May 1999 | Wrexham | 1 | 1 | Slight |
| Wed 12 May 1999 | Flintshire | 2 | 2 | Slight |
| Sat 22 May 1999 | Wrexham | 3 | 3 | Slight |
| Sat 22 May 1999 | Flintshire | 2 | 4 | Slight |
| Mon 24 May 1999 | Flintshire | 3 | 1 | Serious |
| Tue 25 May 1999 | Flintshire | 2 | 2 | Slight |
| Thu 3 Jun 1999 | Flintshire | 1 | 1 | Slight |
| Mon 7 Jun 1999 | Flintshire | 2 | 1 | Slight |
| Wed 9 Jun 1999 | Flintshire | 1 | 2 | Slight |
| Sun 13 Jun 1999 | Flintshire | 2 | 1 | Slight |
| Thu 17 Jun 1999 | Wrexham | 2 | 1 | Slight |
| Sat 19 Jun 1999 | Flintshire | 2 | 4 | Serious |
| Mon 21 Jun 1999 | Flintshire | 1 | 1 | Slight |
| Tue 6 Jul 1999 | Flintshire | 2 | 1 | Slight |
| Sun 11 Jul 1999 | Denbighshire | 2 | 1 | Slight |
| Sun 11 Jul 1999 | Flintshire | 2 | 1 | Slight |
| Mon 26 Jul 1999 | Flintshire | 2 | 6 | Serious |
| Mon 2 Aug 1999 | Wrexham | 2 | 1 | Slight |
| Mon 9 Aug 1999 | Wrexham | 2 | 1 | Slight |
| Tue 10 Aug 1999 | Flintshire | 2 | 1 | Slight |
| Wed 11 Aug 1999 | Flintshire | 2 | 1 | Slight |
| Sat 14 Aug 1999 | Flintshire | 2 | 2 | Serious |
| Sun 22 Aug 1999 | Flintshire | 2 | 2 | Slight |
| Wed 1 Sep 1999 | Wrexham | 2 | 1 | Slight |
| Wed 1 Sep 1999 | Wrexham | 4 | 1 | Slight |
| Sat 11 Sep 1999 | Denbighshire | 2 | 1 | Slight |
| Sat 11 Sep 1999 | Flintshire | 1 | 1 | Slight |
| Mon 13 Sep 1999 | Flintshire | 2 | 1 | Slight |
| Sat 18 Sep 1999 | Denbighshire | 1 | 1 | Slight |
| Fri 1 Oct 1999 | Flintshire | 2 | 3 | Slight |
| Sat 2 Oct 1999 | Flintshire | 2 | 1 | Slight |
| Mon 4 Oct 1999 | Wrexham | 2 | 4 | Serious |
| Mon 4 Oct 1999 | Denbighshire | 1 | 1 | Serious |
| Tue 5 Oct 1999 | Flintshire | 2 | 1 | Slight |
| Wed 6 Oct 1999 | Flintshire | 1 | 1 | Serious |
| Fri 8 Oct 1999 | Flintshire | 2 | 1 | Slight |
| Tue 12 Oct 1999 | Wrexham | 2 | 1 | Slight |
| Sun 17 Oct 1999 | Flintshire | 2 | 1 | Slight |
| Sat 23 Oct 1999 | Flintshire | 1 | 1 | Slight |
| Sat 23 Oct 1999 | Wrexham | 3 | 1 | Slight |
| Tue 2 Nov 1999 | Flintshire | 3 | 1 | Slight |
| Thu 4 Nov 1999 | Flintshire | 4 | 3 | Slight |
| Mon 15 Nov 1999 | Denbighshire | 1 | 1 | Serious |
| Mon 22 Nov 1999 | Flintshire | 2 | 1 | Slight |
| Thu 25 Nov 1999 | Flintshire | 3 | 2 | Slight |
| Sat 27 Nov 1999 | Wrexham | 2 | 5 | Slight |
| Mon 29 Nov 1999 | Wrexham | 3 | 1 | Slight |
| Thu 2 Dec 1999 | Flintshire | 3 | 1 | Slight |
| Sat 4 Dec 1999 | Flintshire | 2 | 1 | Slight |
| Mon 6 Dec 1999 | Flintshire | 2 | 2 | Slight |
| Wed 8 Dec 1999 | Wrexham | 2 | 2 | Serious |
| Sat 11 Dec 1999 | Wrexham | 2 | 1 | Slight |
| Sat 11 Dec 1999 | Wrexham | 2 | 5 | Slight |
| Sat 11 Dec 1999 | Wrexham | 2 | 1 | Slight |
| Tue 14 Dec 1999 | Wrexham | 1 | 1 | Slight |
| Tue 14 Dec 1999 | Flintshire | 2 | 1 | Slight |
| Wed 15 Dec 1999 | Flintshire | 2 | 2 | Slight |
| Thu 16 Dec 1999 | Flintshire | 2 | 1 | Serious |
| Thu 16 Dec 1999 | Wrexham | 2 | 1 | Slight |
| Sun 19 Dec 1999 | Wrexham | 3 | 2 | Slight |
| Mon 27 Dec 1999 | Flintshire | 1 | 1 | Slight |