There are numerous reasons why access to public transport should be encouraged. For every $1 invested in public transport, around $4 of economic returns is generated, while a $10 million investment in public transport generates $30 million in increased business sales. People are also safer traveling on public transport, with accident risk reduced by 90% versus private transport. From an environmental perspective, public transport already saves the US 4.2 billion gallons of gasoline each year, and 37 million metric tons of carbon. As buses emit 20% less carbon monoxide and 25% fewer nitrogen oxides per passenger mile versus single-occupancy cars, public transport is also better for public health.
https://www.archdaily.com/932193/should-cities-make-public-transport-free
