Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sat 4 Jan 1986 | Middlesbrough | 2 | 1 | Slight |
| Tue 14 Jan 1986 | Middlesbrough | 2 | 2 | Serious |
| Mon 20 Jan 1986 | Middlesbrough | 2 | 1 | Slight |
| Fri 24 Jan 1986 | Middlesbrough | 2 | 3 | Slight |
| Wed 5 Feb 1986 | Middlesbrough | 2 | 1 | Slight |
| Mon 10 Feb 1986 | Middlesbrough | 2 | 2 | Slight |
| Tue 11 Feb 1986 | Middlesbrough | 2 | 1 | Slight |
| Sat 15 Feb 1986 | Middlesbrough | 1 | 1 | Serious |
| Thu 20 Feb 1986 | Middlesbrough | 2 | 1 | Slight |
| Sun 23 Feb 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 5 Mar 1986 | Middlesbrough | 1 | 1 | Slight |
| Wed 5 Mar 1986 | Middlesbrough | 2 | 1 | Slight |
| Sat 8 Mar 1986 | Middlesbrough | 2 | 2 | Slight |
| Mon 17 Mar 1986 | Middlesbrough | 2 | 1 | Serious |
| Thu 27 Mar 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 3 Apr 1986 | Middlesbrough | 1 | 1 | Slight |
| Fri 4 Apr 1986 | Middlesbrough | 2 | 1 | Slight |
| Fri 11 Apr 1986 | Middlesbrough | 2 | 1 | Slight |
| Tue 15 Apr 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 16 Apr 1986 | Middlesbrough | 2 | 1 | Slight |
| Fri 18 Apr 1986 | Middlesbrough | 1 | 1 | Serious |
| Wed 23 Apr 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 8 May 1986 | Middlesbrough | 2 | 1 | Slight |
| Fri 9 May 1986 | Middlesbrough | 1 | 1 | Slight |
| Tue 13 May 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 14 May 1986 | Middlesbrough | 1 | 1 | Slight |
| Wed 14 May 1986 | Middlesbrough | 2 | 1 | Slight |
| Tue 20 May 1986 | Middlesbrough | 3 | 2 | Slight |
| Thu 22 May 1986 | Hambleton | 2 | 2 | Fatal |
| Sat 24 May 1986 | Middlesbrough | 1 | 2 | Slight |
| Wed 28 May 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 29 May 1986 | Middlesbrough | 2 | 4 | Slight |
| Sat 31 May 1986 | Hambleton | 2 | 1 | Slight |
| Sat 31 May 1986 | Middlesbrough | 2 | 2 | Slight |
| Fri 6 Jun 1986 | Hambleton | 1 | 1 | Slight |
| Wed 18 Jun 1986 | Middlesbrough | 3 | 1 | Slight |
| Mon 30 Jun 1986 | Middlesbrough | 1 | 2 | Slight |
| Thu 3 Jul 1986 | Middlesbrough | 1 | 1 | Slight |
| Thu 3 Jul 1986 | Middlesbrough | 1 | 1 | Slight |
| Fri 4 Jul 1986 | Hambleton | 4 | 1 | Serious |
| Sat 5 Jul 1986 | Middlesbrough | 1 | 1 | Slight |
| Mon 7 Jul 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 9 Jul 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 23 Jul 1986 | Hambleton | 3 | 1 | Serious |
| Wed 23 Jul 1986 | Middlesbrough | 2 | 2 | Slight |
| Thu 24 Jul 1986 | Middlesbrough | 1 | 1 | Slight |
| Thu 24 Jul 1986 | Middlesbrough | 1 | 1 | Slight |
| Tue 29 Jul 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 31 Jul 1986 | Middlesbrough | 3 | 6 | Serious |
| Mon 4 Aug 1986 | Middlesbrough | 2 | 3 | Slight |
| Thu 21 Aug 1986 | Middlesbrough | 1 | 1 | Serious |
| Tue 26 Aug 1986 | Middlesbrough | 4 | 2 | Slight |
| Tue 26 Aug 1986 | Middlesbrough | 2 | 2 | Serious |
| Thu 28 Aug 1986 | Hambleton | 2 | 4 | Slight |
| Fri 5 Sep 1986 | Middlesbrough | 1 | 1 | Slight |
| Mon 8 Sep 1986 | Middlesbrough | 2 | 1 | Slight |
| Sat 20 Sep 1986 | Middlesbrough | 2 | 1 | Slight |
| Sat 27 Sep 1986 | Hambleton | 2 | 1 | Serious |
| Mon 29 Sep 1986 | Middlesbrough | 1 | 2 | Slight |
| Wed 1 Oct 1986 | Middlesbrough | 2 | 1 | Serious |
| Thu 2 Oct 1986 | Middlesbrough | 1 | 1 | Slight |
| Sat 4 Oct 1986 | Middlesbrough | 2 | 2 | Serious |
| Sun 5 Oct 1986 | Hambleton | 2 | 1 | Slight |
| Fri 10 Oct 1986 | Middlesbrough | 2 | 1 | Slight |
| Mon 20 Oct 1986 | Middlesbrough | 2 | 2 | Slight |
| Tue 28 Oct 1986 | Middlesbrough | 3 | 3 | Slight |
| Wed 29 Oct 1986 | Hambleton | 2 | 1 | Slight |
| Wed 5 Nov 1986 | Middlesbrough | 2 | 1 | Serious |
| Thu 6 Nov 1986 | Middlesbrough | 1 | 1 | Serious |
| Mon 10 Nov 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 13 Nov 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 13 Nov 1986 | Middlesbrough | 2 | 1 | Slight |
| Fri 14 Nov 1986 | Hambleton | 1 | 1 | Serious |
| Fri 14 Nov 1986 | Hambleton | 3 | 2 | Serious |
| Tue 18 Nov 1986 | Middlesbrough | 2 | 1 | Slight |
| Thu 20 Nov 1986 | Hambleton | 2 | 1 | Slight |
| Fri 21 Nov 1986 | Hambleton | 1 | 1 | Slight |
| Sat 22 Nov 1986 | Middlesbrough | 2 | 1 | Serious |
| Sun 23 Nov 1986 | Middlesbrough | 1 | 1 | Serious |
| Wed 26 Nov 1986 | Middlesbrough | 2 | 1 | Slight |
| Wed 26 Nov 1986 | Hambleton | 2 | 2 | Slight |
| Wed 3 Dec 1986 | Middlesbrough | 1 | 1 | Slight |
| Fri 12 Dec 1986 | Middlesbrough | 1 | 1 | Slight |
| Mon 15 Dec 1986 | Middlesbrough | 1 | 1 | Slight |
| Mon 15 Dec 1986 | Middlesbrough | 1 | 1 | Slight |
| Tue 23 Dec 1986 | Middlesbrough | 2 | 1 | Slight |
| Tue 23 Dec 1986 | Hambleton | 2 | 2 | Slight |
| Wed 24 Dec 1986 | Middlesbrough | 2 | 2 | Slight |
| Wed 31 Dec 1986 | Middlesbrough | 2 | 3 | Slight |