Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Sun 4 Jan 1998 | Harrow | 2 | 1 | Slight |
| Thu 8 Jan 1998 | Brent | 1 | 3 | Serious |
| Sat 10 Jan 1998 | Harrow | 2 | 1 | Slight |
| Mon 12 Jan 1998 | Harrow | 1 | 1 | Slight |
| Mon 12 Jan 1998 | Harrow | 1 | 1 | Slight |
| Wed 14 Jan 1998 | Harrow | 1 | 1 | Slight |
| Wed 14 Jan 1998 | Harrow | 1 | 1 | Slight |
| Thu 15 Jan 1998 | Harrow | 1 | 1 | Slight |
| Thu 22 Jan 1998 | Hertsmere | 1 | 1 | Slight |
| Thu 29 Jan 1998 | Hertsmere | 3 | 2 | Slight |
| Wed 4 Feb 1998 | Harrow | 1 | 1 | Slight |
| Thu 5 Feb 1998 | Harrow | 1 | 1 | Serious |
| Sun 15 Feb 1998 | Brent | 2 | 1 | Slight |
| Sun 15 Feb 1998 | Hertsmere | 2 | 1 | Slight |
| Mon 16 Feb 1998 | Brent | 2 | 1 | Slight |
| Mon 16 Feb 1998 | Harrow | 2 | 1 | Serious |
| Fri 27 Feb 1998 | Harrow | 1 | 1 | Slight |
| Wed 4 Mar 1998 | Harrow | 2 | 1 | Slight |
| Wed 4 Mar 1998 | Hertsmere | 1 | 1 | Slight |
| Fri 6 Mar 1998 | Brent | 2 | 1 | Slight |
| Tue 10 Mar 1998 | Harrow | 1 | 1 | Slight |
| Sat 14 Mar 1998 | Harrow | 2 | 1 | Slight |
| Thu 19 Mar 1998 | Harrow | 2 | 1 | Slight |
| Sun 29 Mar 1998 | Harrow | 2 | 1 | Slight |
| Mon 30 Mar 1998 | Hertsmere | 2 | 1 | Slight |
| Tue 31 Mar 1998 | Hertsmere | 2 | 1 | Slight |
| Sat 4 Apr 1998 | Hertsmere | 2 | 1 | Slight |
| Thu 9 Apr 1998 | Brent | 2 | 3 | Slight |
| Fri 10 Apr 1998 | Hertsmere | 2 | 1 | Slight |
| Mon 13 Apr 1998 | Harrow | 1 | 1 | Slight |
| Thu 23 Apr 1998 | Harrow | 2 | 1 | Slight |
| Thu 30 Apr 1998 | Harrow | 1 | 2 | Slight |
| Sat 9 May 1998 | Harrow | 3 | 1 | Slight |
| Tue 12 May 1998 | Hertsmere | 2 | 1 | Serious |
| Tue 19 May 1998 | Harrow | 1 | 1 | Fatal |
| Thu 28 May 1998 | Harrow | 2 | 1 | Slight |
| Mon 15 Jun 1998 | Harrow | 3 | 1 | Slight |
| Mon 15 Jun 1998 | Harrow | 2 | 1 | Slight |
| Tue 16 Jun 1998 | Harrow | 1 | 1 | Slight |
| Wed 17 Jun 1998 | Brent | 4 | 2 | Serious |
| Thu 18 Jun 1998 | Brent | 2 | 1 | Slight |
| Sat 20 Jun 1998 | Brent | 2 | 1 | Serious |
| Thu 25 Jun 1998 | Hertsmere | 1 | 1 | Slight |
| Sat 11 Jul 1998 | Brent | 2 | 2 | Slight |
| Thu 16 Jul 1998 | Brent | 2 | 1 | Slight |
| Fri 17 Jul 1998 | Harrow | 2 | 1 | Slight |
| Sun 19 Jul 1998 | Harrow | 1 | 2 | Serious |
| Mon 20 Jul 1998 | Hertsmere | 2 | 1 | Slight |
| Tue 11 Aug 1998 | Harrow | 2 | 1 | Slight |
| Wed 19 Aug 1998 | Hertsmere | 2 | 2 | Slight |
| Fri 21 Aug 1998 | Harrow | 2 | 1 | Slight |
| Fri 28 Aug 1998 | Harrow | 1 | 1 | Slight |
| Tue 1 Sep 1998 | Harrow | 2 | 2 | Slight |
| Thu 10 Sep 1998 | Hertsmere | 1 | 1 | Serious |
| Fri 11 Sep 1998 | Harrow | 2 | 1 | Slight |
| Tue 15 Sep 1998 | Harrow | 2 | 1 | Slight |
| Tue 15 Sep 1998 | Brent | 2 | 2 | Fatal |
| Wed 16 Sep 1998 | Harrow | 2 | 1 | Slight |
| Fri 25 Sep 1998 | Brent | 1 | 1 | Slight |
| Wed 30 Sep 1998 | Brent | 2 | 1 | Slight |
| Tue 6 Oct 1998 | Harrow | 2 | 1 | Slight |
| Fri 9 Oct 1998 | Harrow | 2 | 1 | Slight |
| Mon 12 Oct 1998 | Harrow | 1 | 1 | Slight |
| Mon 12 Oct 1998 | Harrow | 1 | 1 | Slight |
| Sat 24 Oct 1998 | Brent | 1 | 2 | Serious |
| Tue 27 Oct 1998 | Hertsmere | 2 | 1 | Slight |
| Sun 1 Nov 1998 | Hertsmere | 2 | 1 | Slight |
| Sun 8 Nov 1998 | Harrow | 2 | 1 | Slight |
| Fri 13 Nov 1998 | Harrow | 2 | 1 | Slight |
| Sun 15 Nov 1998 | Brent | 1 | 1 | Slight |
| Wed 18 Nov 1998 | Brent | 2 | 1 | Slight |
| Wed 18 Nov 1998 | Harrow | 2 | 1 | Slight |
| Thu 19 Nov 1998 | Harrow | 2 | 1 | Slight |
| Tue 24 Nov 1998 | Harrow | 2 | 1 | Slight |
| Tue 24 Nov 1998 | Hertsmere | 1 | 1 | Slight |
| Wed 25 Nov 1998 | Hertsmere | 4 | 2 | Slight |
| Wed 25 Nov 1998 | Harrow | 1 | 1 | Slight |
| Fri 27 Nov 1998 | Harrow | 1 | 1 | Serious |
| Sun 6 Dec 1998 | Brent | 2 | 1 | Slight |
| Tue 8 Dec 1998 | Harrow | 2 | 1 | Slight |
| Fri 11 Dec 1998 | Harrow | 1 | 1 | Slight |
| Mon 14 Dec 1998 | Hertsmere | 2 | 1 | Slight |
| Mon 21 Dec 1998 | Brent | 2 | 1 | Slight |
| Thu 24 Dec 1998 | Harrow | 1 | 1 | Slight |
| Sun 27 Dec 1998 | Brent | 2 | 1 | Slight |