03/20/2026
"The most recent research suggests that trees may improve driving safety. One study found a 46% decrease in crash rates across urban arterial and highway sites after landscape improvements were installed."
The University of Washington School of Environmental and Forest Sciences is a leading center for research into the impacts of street trees on traffic and pedestrian safety. This page gathers that research into clear and comprehensive reading.
A summary of social science evidence on the role of urban greening in transportation safety in cities