Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 1 Jan 1999 | Northampton | 2 | 2 | Slight |
| Sat 2 Jan 1999 | Northampton | 2 | 1 | Slight |
| Sun 3 Jan 1999 | Northampton | 2 | 1 | Slight |
| Thu 7 Jan 1999 | South Northamptonshire | 2 | 1 | Slight |
| Fri 8 Jan 1999 | Northampton | 2 | 1 | Slight |
| Sun 10 Jan 1999 | South Northamptonshire | 2 | 2 | Serious |
| Thu 14 Jan 1999 | Daventry | 1 | 1 | Slight |
| Thu 14 Jan 1999 | Daventry | 2 | 1 | Serious |
| Sun 17 Jan 1999 | Northampton | 2 | 1 | Slight |
| Wed 20 Jan 1999 | South Northamptonshire | 2 | 1 | Slight |
| Thu 21 Jan 1999 | Northampton | 1 | 1 | Serious |
| Thu 21 Jan 1999 | Northampton | 2 | 1 | Slight |
| Sun 24 Jan 1999 | Northampton | 2 | 1 | Slight |
| Thu 28 Jan 1999 | South Northamptonshire | 2 | 1 | Serious |
| Fri 29 Jan 1999 | Daventry | 3 | 2 | Serious |
| Tue 2 Feb 1999 | Daventry | 1 | 1 | Slight |
| Thu 4 Feb 1999 | Northampton | 2 | 1 | Slight |
| Fri 12 Feb 1999 | South Northamptonshire | 1 | 1 | Slight |
| Sat 13 Feb 1999 | Daventry | 2 | 3 | Slight |
| Sat 13 Feb 1999 | Daventry | 1 | 1 | Slight |
| Sat 20 Feb 1999 | South Northamptonshire | 2 | 2 | Slight |
| Wed 24 Feb 1999 | South Northamptonshire | 2 | 1 | Slight |
| Wed 24 Feb 1999 | Northampton | 2 | 1 | Slight |
| Thu 25 Feb 1999 | Northampton | 2 | 1 | Slight |
| Thu 25 Feb 1999 | South Northamptonshire | 1 | 1 | Slight |
| Sun 28 Feb 1999 | Northampton | 1 | 1 | Serious |
| Mon 1 Mar 1999 | South Northamptonshire | 2 | 2 | Slight |
| Sun 14 Mar 1999 | South Northamptonshire | 2 | 1 | Slight |
| Tue 16 Mar 1999 | Northampton | 2 | 1 | Serious |
| Mon 22 Mar 1999 | Daventry | 1 | 3 | Serious |
| Mon 29 Mar 1999 | Northampton | 2 | 1 | Slight |
| Mon 29 Mar 1999 | South Northamptonshire | 2 | 2 | Fatal |
| Sat 3 Apr 1999 | Northampton | 1 | 1 | Serious |
| Wed 7 Apr 1999 | Northampton | 2 | 1 | Slight |
| Sat 10 Apr 1999 | Northampton | 2 | 1 | Slight |
| Thu 15 Apr 1999 | Northampton | 2 | 1 | Slight |
| Sun 18 Apr 1999 | Northampton | 2 | 1 | Serious |
| Sun 18 Apr 1999 | Daventry | 2 | 2 | Slight |
| Mon 19 Apr 1999 | South Northamptonshire | 2 | 1 | Slight |
| Wed 21 Apr 1999 | South Northamptonshire | 2 | 7 | Serious |
| Wed 21 Apr 1999 | Northampton | 1 | 1 | Slight |
| Wed 21 Apr 1999 | Northampton | 1 | 1 | Slight |
| Fri 23 Apr 1999 | Northampton | 1 | 1 | Slight |
| Sat 24 Apr 1999 | Northampton | 1 | 1 | Serious |
| Mon 26 Apr 1999 | Northampton | 2 | 1 | Slight |
| Mon 26 Apr 1999 | Daventry | 4 | 1 | Slight |
| Mon 26 Apr 1999 | South Northamptonshire | 1 | 1 | Slight |
| Sat 1 May 1999 | Northampton | 1 | 1 | Slight |
| Sun 2 May 1999 | Daventry | 1 | 5 | Serious |
| Sun 2 May 1999 | Northampton | 2 | 2 | Slight |
| Fri 7 May 1999 | Daventry | 2 | 3 | Slight |
| Thu 13 May 1999 | Northampton | 2 | 1 | Slight |
| Mon 17 May 1999 | South Northamptonshire | 2 | 1 | Slight |
| Wed 19 May 1999 | Northampton | 2 | 1 | Slight |
| Mon 24 May 1999 | Northampton | 2 | 1 | Slight |
| Sat 29 May 1999 | Northampton | 2 | 4 | Slight |
| Sun 30 May 1999 | South Northamptonshire | 3 | 3 | Slight |
| Wed 2 Jun 1999 | South Northamptonshire | 3 | 4 | Slight |
| Mon 7 Jun 1999 | South Northamptonshire | 2 | 1 | Serious |
| Fri 11 Jun 1999 | South Northamptonshire | 2 | 1 | Slight |
| Sat 12 Jun 1999 | Northampton | 3 | 2 | Slight |
| Sun 13 Jun 1999 | Northampton | 2 | 3 | Serious |
| Mon 14 Jun 1999 | Northampton | 2 | 1 | Slight |
| Wed 16 Jun 1999 | Northampton | 3 | 1 | Slight |
| Sat 19 Jun 1999 | Northampton | 2 | 2 | Slight |
| Sun 20 Jun 1999 | Northampton | 3 | 1 | Slight |
| Mon 21 Jun 1999 | Northampton | 1 | 1 | Slight |
| Tue 22 Jun 1999 | Northampton | 2 | 1 | Slight |
| Tue 22 Jun 1999 | Northampton | 2 | 2 | Slight |
| Wed 23 Jun 1999 | Northampton | 2 | 1 | Slight |
| Fri 25 Jun 1999 | Northampton | 2 | 1 | Serious |
| Sat 26 Jun 1999 | Daventry | 2 | 2 | Serious |
| Thu 1 Jul 1999 | Harborough | 2 | 1 | Slight |
| Fri 2 Jul 1999 | South Northamptonshire | 2 | 1 | Serious |
| Sat 3 Jul 1999 | Northampton | 2 | 1 | Slight |
| Thu 8 Jul 1999 | South Northamptonshire | 2 | 2 | Serious |
| Tue 13 Jul 1999 | Northampton | 2 | 1 | Slight |
| Mon 19 Jul 1999 | Northampton | 2 | 1 | Slight |
| Tue 20 Jul 1999 | Northampton | 2 | 1 | Slight |
| Tue 20 Jul 1999 | Northampton | 1 | 2 | Slight |
| Tue 20 Jul 1999 | Northampton | 2 | 3 | Slight |
| Wed 4 Aug 1999 | Northampton | 2 | 1 | Slight |
| Thu 5 Aug 1999 | Northampton | 1 | 1 | Slight |
| Wed 11 Aug 1999 | Northampton | 1 | 1 | Slight |
| Sat 14 Aug 1999 | Northampton | 2 | 2 | Slight |
| Wed 18 Aug 1999 | Northampton | 2 | 1 | Slight |
| Fri 20 Aug 1999 | Northampton | 2 | 1 | Slight |
| Wed 25 Aug 1999 | South Northamptonshire | 2 | 1 | Serious |
| Wed 1 Sep 1999 | Daventry | 2 | 2 | Serious |
| Wed 1 Sep 1999 | South Northamptonshire | 3 | 1 | Slight |
| Sun 5 Sep 1999 | South Northamptonshire | 1 | 1 | Slight |
| Sat 11 Sep 1999 | South Northamptonshire | 2 | 1 | Slight |
| Mon 13 Sep 1999 | Northampton | 1 | 1 | Slight |
| Wed 15 Sep 1999 | Northampton | 2 | 1 | Slight |
| Sat 18 Sep 1999 | Northampton | 2 | 1 | Slight |
| Sun 19 Sep 1999 | Northampton | 1 | 2 | Slight |
| Mon 20 Sep 1999 | Northampton | 1 | 1 | Slight |
| Wed 22 Sep 1999 | Northampton | 4 | 15 | Slight |
| Thu 23 Sep 1999 | Northampton | 2 | 1 | Slight |
| Fri 24 Sep 1999 | Northampton | 2 | 1 | Slight |
| Fri 24 Sep 1999 | South Northamptonshire | 2 | 1 | Slight |
| Mon 27 Sep 1999 | Northampton | 2 | 1 | Slight |
| Thu 30 Sep 1999 | Northampton | 2 | 3 | Slight |
| Fri 1 Oct 1999 | Northampton | 2 | 1 | Slight |
| Tue 5 Oct 1999 | South Northamptonshire | 3 | 2 | Serious |
| Wed 6 Oct 1999 | South Northamptonshire | 2 | 1 | Slight |
| Wed 6 Oct 1999 | Northampton | 1 | 1 | Slight |
| Fri 8 Oct 1999 | Northampton | 2 | 1 | Slight |
| Sat 9 Oct 1999 | South Northamptonshire | 3 | 2 | Fatal |
| Mon 11 Oct 1999 | Daventry | 2 | 2 | Fatal |
| Wed 20 Oct 1999 | South Northamptonshire | 3 | 2 | Slight |
| Sat 30 Oct 1999 | Daventry | 2 | 2 | Slight |
| Thu 4 Nov 1999 | Northampton | 1 | 1 | Slight |
| Thu 4 Nov 1999 | Northampton | 2 | 1 | Slight |
| Tue 9 Nov 1999 | Northampton | 2 | 2 | Slight |
| Wed 10 Nov 1999 | Daventry | 2 | 1 | Slight |
| Fri 12 Nov 1999 | Northampton | 1 | 1 | Slight |
| Sat 13 Nov 1999 | South Northamptonshire | 1 | 1 | Serious |
| Sat 13 Nov 1999 | Northampton | 1 | 1 | Slight |
| Sun 14 Nov 1999 | Northampton | 3 | 1 | Slight |
| Mon 15 Nov 1999 | Harborough | 2 | 1 | Slight |
| Tue 16 Nov 1999 | Daventry | 2 | 1 | Slight |
| Thu 18 Nov 1999 | Northampton | 2 | 2 | Slight |
| Thu 18 Nov 1999 | Northampton | 6 | 4 | Slight |
| Sat 20 Nov 1999 | South Northamptonshire | 2 | 1 | Slight |
| Sun 21 Nov 1999 | Northampton | 2 | 1 | Slight |
| Tue 23 Nov 1999 | Northampton | 1 | 1 | Slight |
| Wed 24 Nov 1999 | Northampton | 1 | 1 | Serious |
| Fri 26 Nov 1999 | Northampton | 2 | 1 | Slight |
| Sun 28 Nov 1999 | Northampton | 2 | 1 | Slight |
| Mon 29 Nov 1999 | Northampton | 2 | 1 | Slight |
| Wed 1 Dec 1999 | Northampton | 2 | 1 | Slight |
| Sun 5 Dec 1999 | Northampton | 2 | 2 | Slight |
| Sun 5 Dec 1999 | South Northamptonshire | 1 | 1 | Serious |
| Mon 6 Dec 1999 | Northampton | 2 | 1 | Slight |
| Tue 7 Dec 1999 | Northampton | 3 | 1 | Slight |
| Wed 8 Dec 1999 | Northampton | 3 | 1 | Slight |
| Thu 9 Dec 1999 | Northampton | 2 | 3 | Serious |
| Thu 9 Dec 1999 | Northampton | 1 | 1 | Slight |
| Wed 15 Dec 1999 | Northampton | 2 | 1 | Serious |
| Sat 18 Dec 1999 | Northampton | 1 | 1 | Slight |