mobilitydimarca, 
A comprehensive comparison of the social cost of #automobility, #cycling and #walking in the #EU.
The cost of automobility is about €500 billion per year.
Due to positive #health effects, cycling is an external benefit worth €24 billion per year and walking €66 billion per year
https://www.sciencedirect.com/science/article/abs/pii/S0921800918308097
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