Madrid 2006.

Methods	CBA 2 yrs before data 2 yrs after data
Participants	I) Undivided rural roads belonging to the highway network of the Autonomous Community of Madrid that received treatment between 1986 and 1989. C) Undivided rural roads belonging to the highway network of the Autonomous Community of Madrid that received treatment between 1990 and 1993. i.e. roads that during the time period of the study did not receive treatment but would later be treated.
Interventions	I) Highway upgrading, traffic signing, pavement markings, pavement resurfacing C) No area‐wide traffic calming
Outcomes	Number of road traffic crashes
Notes	Data could not be extracted