Study	Reason for exclusion
Amundsen 1984	Uncontrolled before/after
Brownfield 1980	Uncontrolled before/after
Chick 1994	Uncontrolled before/after
Chua 1991	Uncontrolled before/after
Cloke 1999	Uncontrolled before/after
Cole 1990	Uncontrolled before/after
Drammen Byplankontor 1980	Uncontrolled before/after
Ebbecke 1977	Uncontrolled before/after
Elmberg 1972	Uncontrolled before/after
Engel 1982	Not area‐wide traffic calming
Engel 1983	Uncontrolled before/after
Engel 1989a	Not area‐wide traffic calming
Engel 1989b	Not area‐wide traffic calming
Engel 1990	Not area‐wide traffic calming
Fager 1984	Uncontrolled before/after
Faure 1992	Uncontrolled before/after
Fisher 1989	Uncontrolled before/after
Gennaoui 1987	Uncontrolled before/after
Gunnarsson 1992	Uncontrolled before/after
Haakenaasen 1982	Uncontrolled before/after
Hagan 1988	Uncontrolled before/after
Hart 1982	Uncontrolled before/after
Heaton 1980	Uncontrolled before/after
HRC 1987	Uncontrolled before/after
HRC 1988	Uncontrolled before/after
Kraay 1984	Unable to locate full text to enable assessment for inclusion.
Kuemmel 1983	Uncontrolled before/after
McDonald 1984	Uncontrolled before/after
Meyer 2000	Uncontrolled before/after
Mok 2003	Uncontrolled before/after
Mountain 1989	Uncontrolled before/after
Muskaug 1976	Uncontrolled before/after
Oslo Byplankontor 1978	Uncontrolled before/after
Pau 2001	Uncontrolled before/after
Portland 2000	Uncontrolled before/after
Rimiller 2003	Only evaluated "road diet" interventions
Scottish Exec. 1999	Uncontrolled before/after
Stolen 1988	Uncontrolled before/after
Tester 2004	Case‐control
TRL 1997	Uncontrolled before/after
Vreugdenhil 1972	Uncontrolled before/after
Vreugdenhil 1976	Uncontrolled before/after