Big new idea - encourage walking and bike riding - recent Boston study finds investments in infrastructure to promote bicycling and walking could save as many as 770 lives and $7.6 billion each year across 12 northeastern states and the District of Columbia under the proposed Transportation and Climate Initiative (TCI) - extrapolated to many world cities means many thousands of healthier lives, many $billions saved & a cleaner planet: https://www.hsph.harvard.edu/c-change/news/transportation-infrastructure-investments-could-save-hundreds-of-lives-billions-of-dollars/