Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 6 Jan 1999 | Ryedale | 3 | 2 | Serious |
| Sat 9 Jan 1999 | East Riding of Yorkshire | 1 | 1 | Slight |
| Mon 11 Jan 1999 | East Riding of Yorkshire | 2 | 3 | Slight |
| Sat 16 Jan 1999 | East Riding of Yorkshire | 1 | 1 | Serious |
| Thu 21 Jan 1999 | East Riding of Yorkshire | 1 | 1 | Slight |
| Sun 31 Jan 1999 | East Riding of Yorkshire | 1 | 1 | Slight |
| Mon 8 Feb 1999 | Ryedale | 2 | 1 | Serious |
| Wed 24 Feb 1999 | East Riding of Yorkshire | 2 | 1 | Slight |
| Thu 18 Mar 1999 | East Riding of Yorkshire | 2 | 1 | Slight |
| Fri 2 Apr 1999 | East Riding of Yorkshire | 2 | 1 | Serious |
| Sat 24 Apr 1999 | East Riding of Yorkshire | 1 | 1 | Serious |
| Mon 3 May 1999 | East Riding of Yorkshire | 2 | 8 | Fatal |
| Thu 13 May 1999 | East Riding of Yorkshire | 2 | 2 | Slight |
| Fri 14 May 1999 | East Riding of Yorkshire | 2 | 3 | Slight |
| Sun 16 May 1999 | East Riding of Yorkshire | 2 | 1 | Slight |
| Thu 3 Jun 1999 | East Riding of Yorkshire | 2 | 1 | Slight |
| Fri 25 Jun 1999 | East Riding of Yorkshire | 1 | 1 | Slight |
| Sat 3 Jul 1999 | East Riding of Yorkshire | 2 | 2 | Slight |
| Wed 7 Jul 1999 | East Riding of Yorkshire | 1 | 1 | Serious |
| Thu 8 Jul 1999 | West Lindsey | 1 | 1 | Slight |
| Sun 11 Jul 1999 | East Riding of Yorkshire | 2 | 1 | Serious |
| Sat 31 Jul 1999 | East Riding of Yorkshire | 2 | 2 | Slight |
| Sun 15 Aug 1999 | Ryedale | 3 | 3 | Slight |
| Sun 29 Aug 1999 | East Riding of Yorkshire | 2 | 1 | Slight |
| Wed 6 Oct 1999 | Ryedale | 2 | 3 | Slight |
| Wed 20 Oct 1999 | East Riding of Yorkshire | 1 | 1 | Slight |
| Sat 13 Nov 1999 | East Riding of Yorkshire | 3 | 2 | Slight |
| Sun 21 Nov 1999 | East Riding of Yorkshire | 1 | 1 | Serious |
| Thu 2 Dec 1999 | East Riding of Yorkshire | 2 | 1 | Serious |
| Fri 3 Dec 1999 | Ryedale | 1 | 1 | Serious |
| Thu 9 Dec 1999 | East Riding of Yorkshire | 1 | 1 | Serious |
| Fri 17 Dec 1999 | East Riding of Yorkshire | 3 | 1 | Slight |