1. Results ‐ server training (injuries).

Buka 1999	Not measured.
Gliksman 1993	Not measured.
Graham 2004	Not measured.
Holder 1994	SINGLE VEHICLE NIGHT TIME (SVN) CRASHES Effect estimate = ‐0.524 (95% CI ‐0.956 to ‐0.091), t‐ratio = ‐2.40. The estimate is adjusted for seasonal fluctuations in crashes; alcohol related policy changes (changes to DUI legislation and reduction in legal driving BAL to 0.08) and for pattern of crashes in control states. Authors report the net estimated decline in SVN crashes following the implementation of the policy as: 4% after six months; 11% after 12 months; 18% after 24 months; 23% after 36 months.
Howard‐Pitney 1991	Not measured.
Johnsson 2003	Not measured.
Krass 1994	Not measured.
Lang 1998	Not measured.
McKnight 1991	Not measured.
Russ 1987	Not measured.
Saltz 1987	Not measured.
Saltz 1997	Not measured.
Toomey 2001	Not measured.
Toomey 2008	Not measured
Wallin 2003	POLICE REPORTED VIOLENCE When adjusting for the development in the control area, the intervention parameter = ‐0.344 (se = 0.046), P < 0.001. The authors estimated this to represent a 29% reduction in police‐reported violence in the experimental area.