Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 2 Jan 1998 | Calderdale | 1 | 1 | Slight |
| Sat 3 Jan 1998 | Kirklees | 2 | 1 | Slight |
| Mon 5 Jan 1998 | Calderdale | 2 | 1 | Serious |
| Mon 5 Jan 1998 | Leeds | 2 | 1 | Slight |
| Mon 5 Jan 1998 | Leeds | 2 | 1 | Serious |
| Tue 6 Jan 1998 | Kirklees | 2 | 1 | Slight |
| Tue 6 Jan 1998 | Kirklees | 2 | 1 | Slight |
| Thu 8 Jan 1998 | Leeds | 2 | 2 | Slight |
| Thu 8 Jan 1998 | Kirklees | 1 | 2 | Slight |
| Fri 9 Jan 1998 | Leeds | 2 | 1 | Slight |
| Thu 15 Jan 1998 | Leeds | 3 | 4 | Slight |
| Thu 15 Jan 1998 | Kirklees | 2 | 2 | Slight |
| Fri 16 Jan 1998 | Leeds | 2 | 1 | Slight |
| Sun 18 Jan 1998 | Kirklees | 2 | 1 | Slight |
| Mon 19 Jan 1998 | Leeds | 2 | 1 | Slight |
| Mon 26 Jan 1998 | Kirklees | 2 | 1 | Slight |
| Wed 28 Jan 1998 | Leeds | 2 | 1 | Slight |
| Tue 3 Feb 1998 | Leeds | 2 | 2 | Slight |
| Tue 3 Feb 1998 | Leeds | 2 | 1 | Slight |
| Fri 6 Feb 1998 | Kirklees | 2 | 1 | Serious |
| Fri 6 Feb 1998 | Leeds | 2 | 1 | Slight |
| Tue 10 Feb 1998 | Calderdale | 2 | 1 | Slight |
| Fri 13 Feb 1998 | Kirklees | 2 | 2 | Slight |
| Sun 15 Feb 1998 | Kirklees | 2 | 1 | Serious |
| Mon 16 Feb 1998 | Kirklees | 2 | 2 | Slight |
| Wed 18 Feb 1998 | Calderdale | 2 | 1 | Slight |
| Thu 19 Feb 1998 | Calderdale | 2 | 1 | Slight |
| Thu 5 Mar 1998 | Leeds | 1 | 1 | Slight |
| Fri 6 Mar 1998 | Calderdale | 1 | 1 | Slight |
| Sun 8 Mar 1998 | Kirklees | 1 | 1 | Slight |
| Sun 8 Mar 1998 | Kirklees | 2 | 2 | Slight |
| Fri 13 Mar 1998 | Leeds | 2 | 1 | Slight |
| Sat 14 Mar 1998 | Calderdale | 1 | 1 | Slight |
| Sun 15 Mar 1998 | Leeds | 2 | 1 | Slight |
| Mon 16 Mar 1998 | Kirklees | 1 | 1 | Serious |
| Wed 18 Mar 1998 | Leeds | 2 | 1 | Slight |
| Tue 24 Mar 1998 | Leeds | 2 | 1 | Slight |
| Fri 3 Apr 1998 | Leeds | 2 | 1 | Slight |
| Sun 12 Apr 1998 | Kirklees | 1 | 2 | Fatal |
| Mon 20 Apr 1998 | Kirklees | 3 | 5 | Slight |
| Wed 22 Apr 1998 | Kirklees | 2 | 1 | Slight |
| Mon 27 Apr 1998 | Leeds | 2 | 1 | Slight |
| Tue 28 Apr 1998 | Calderdale | 1 | 1 | Serious |
| Mon 11 May 1998 | Leeds | 2 | 1 | Slight |
| Wed 13 May 1998 | Kirklees | 1 | 1 | Slight |
| Sun 17 May 1998 | Leeds | 3 | 3 | Slight |
| Sun 17 May 1998 | Leeds | 3 | 3 | Slight |
| Mon 18 May 1998 | Leeds | 2 | 1 | Slight |
| Thu 21 May 1998 | Kirklees | 2 | 1 | Slight |
| Mon 25 May 1998 | Leeds | 2 | 1 | Slight |
| Tue 26 May 1998 | Kirklees | 2 | 1 | Slight |
| Sat 30 May 1998 | Calderdale | 2 | 1 | Slight |
| Wed 3 Jun 1998 | Leeds | 2 | 2 | Slight |
| Tue 9 Jun 1998 | Kirklees | 2 | 2 | Slight |
| Fri 12 Jun 1998 | Kirklees | 1 | 1 | Slight |
| Sat 13 Jun 1998 | Calderdale | 2 | 1 | Slight |
| Fri 19 Jun 1998 | Kirklees | 2 | 2 | Slight |
| Sat 20 Jun 1998 | Leeds | 2 | 1 | Slight |
| Fri 26 Jun 1998 | Kirklees | 1 | 1 | Serious |
| Fri 26 Jun 1998 | Kirklees | 1 | 1 | Serious |
| Fri 26 Jun 1998 | Kirklees | 1 | 1 | Slight |
| Thu 2 Jul 1998 | Calderdale | 1 | 1 | Slight |
| Fri 10 Jul 1998 | Leeds | 2 | 1 | Slight |
| Tue 14 Jul 1998 | Kirklees | 2 | 1 | Slight |
| Thu 16 Jul 1998 | Leeds | 2 | 1 | Slight |
| Mon 20 Jul 1998 | Kirklees | 1 | 1 | Slight |
| Sun 2 Aug 1998 | Kirklees | 1 | 1 | Slight |
| Mon 10 Aug 1998 | Leeds | 2 | 1 | Slight |
| Thu 13 Aug 1998 | Kirklees | 2 | 3 | Slight |
| Thu 13 Aug 1998 | Kirklees | 2 | 1 | Slight |
| Tue 18 Aug 1998 | Leeds | 2 | 2 | Slight |
| Thu 20 Aug 1998 | Calderdale | 2 | 2 | Slight |
| Tue 25 Aug 1998 | Kirklees | 2 | 1 | Slight |
| Wed 26 Aug 1998 | Kirklees | 1 | 1 | Slight |
| Thu 3 Sep 1998 | Leeds | 2 | 1 | Slight |
| Sat 5 Sep 1998 | Leeds | 1 | 3 | Slight |
| Fri 11 Sep 1998 | Leeds | 4 | 8 | Slight |
| Sat 12 Sep 1998 | Kirklees | 2 | 1 | Slight |
| Fri 18 Sep 1998 | Leeds | 2 | 2 | Serious |
| Sun 20 Sep 1998 | Leeds | 3 | 1 | Slight |
| Tue 22 Sep 1998 | Leeds | 1 | 2 | Slight |
| Wed 23 Sep 1998 | Leeds | 2 | 1 | Slight |
| Thu 24 Sep 1998 | Kirklees | 3 | 2 | Slight |
| Fri 25 Sep 1998 | Leeds | 2 | 1 | Slight |
| Fri 25 Sep 1998 | Leeds | 1 | 1 | Slight |
| Sat 26 Sep 1998 | Leeds | 2 | 1 | Slight |
| Wed 30 Sep 1998 | Leeds | 2 | 2 | Slight |
| Wed 30 Sep 1998 | Leeds | 3 | 1 | Slight |
| Sat 3 Oct 1998 | Leeds | 2 | 1 | Slight |
| Sun 4 Oct 1998 | Leeds | 2 | 2 | Slight |
| Wed 7 Oct 1998 | Leeds | 2 | 2 | Slight |
| Thu 8 Oct 1998 | Leeds | 1 | 1 | Slight |
| Sat 10 Oct 1998 | Leeds | 2 | 1 | Serious |
| Sat 10 Oct 1998 | Calderdale | 2 | 1 | Slight |
| Sun 11 Oct 1998 | Calderdale | 2 | 2 | Slight |
| Mon 12 Oct 1998 | Leeds | 2 | 1 | Serious |
| Fri 16 Oct 1998 | Kirklees | 1 | 1 | Serious |
| Sun 18 Oct 1998 | Leeds | 2 | 1 | Slight |
| Tue 20 Oct 1998 | Kirklees | 2 | 2 | Slight |
| Sat 24 Oct 1998 | Kirklees | 3 | 3 | Slight |
| Mon 26 Oct 1998 | Leeds | 2 | 1 | Slight |
| Mon 26 Oct 1998 | Leeds | 2 | 1 | Slight |
| Mon 26 Oct 1998 | Leeds | 2 | 1 | Slight |
| Thu 29 Oct 1998 | Leeds | 2 | 1 | Slight |
| Thu 5 Nov 1998 | Kirklees | 2 | 2 | Slight |
| Mon 9 Nov 1998 | Calderdale | 2 | 1 | Slight |
| Fri 13 Nov 1998 | Calderdale | 2 | 1 | Slight |
| Fri 13 Nov 1998 | Kirklees | 2 | 1 | Slight |
| Mon 16 Nov 1998 | Kirklees | 2 | 3 | Slight |
| Wed 18 Nov 1998 | Kirklees | 2 | 1 | Slight |
| Sat 21 Nov 1998 | Leeds | 2 | 2 | Serious |
| Sat 21 Nov 1998 | Leeds | 2 | 2 | Serious |
| Sat 21 Nov 1998 | Kirklees | 2 | 2 | Slight |
| Mon 23 Nov 1998 | Kirklees | 2 | 2 | Slight |
| Tue 24 Nov 1998 | Leeds | 2 | 1 | Slight |
| Fri 27 Nov 1998 | Kirklees | 2 | 1 | Slight |
| Sat 28 Nov 1998 | Leeds | 2 | 1 | Slight |
| Mon 30 Nov 1998 | Kirklees | 2 | 1 | Slight |
| Tue 1 Dec 1998 | Leeds | 2 | 1 | Slight |
| Tue 1 Dec 1998 | Kirklees | 1 | 1 | Slight |
| Wed 2 Dec 1998 | Kirklees | 2 | 1 | Slight |
| Thu 3 Dec 1998 | Kirklees | 2 | 1 | Serious |
| Sat 5 Dec 1998 | Leeds | 2 | 3 | Serious |
| Tue 8 Dec 1998 | Kirklees | 2 | 3 | Slight |
| Tue 8 Dec 1998 | Kirklees | 2 | 3 | Slight |
| Sat 12 Dec 1998 | Leeds | 4 | 2 | Slight |
| Fri 18 Dec 1998 | Leeds | 2 | 1 | Serious |
| Sat 19 Dec 1998 | Leeds | 2 | 1 | Slight |
| Sat 19 Dec 1998 | Leeds | 1 | 1 | Slight |
| Sun 20 Dec 1998 | Kirklees | 1 | 1 | Slight |
| Mon 21 Dec 1998 | Calderdale | 2 | 1 | Slight |
| Mon 21 Dec 1998 | Leeds | 2 | 1 | Slight |
| Tue 22 Dec 1998 | Calderdale | 1 | 2 | Serious |
| Tue 22 Dec 1998 | Leeds | 2 | 1 | Slight |
| Wed 23 Dec 1998 | Leeds | 3 | 1 | Slight |
| Tue 29 Dec 1998 | Kirklees | 3 | 2 | Slight |
| Wed 30 Dec 1998 | Calderdale | 1 | 1 | Slight |
| Wed 30 Dec 1998 | Kirklees | 1 | 1 | Slight |