"Even in the most crime-free of America's neighborhoods, people don't feel entirely safe when they're out and about.

Drivers, some of whom view the nation's roadways as their exclusive domain, are having to contend with growing numbers of bicyclists and pedestrians.

Bicyclists, who are largely focused on maneuvering through vehicle traffic and not getting sideswiped on shoulderless streets, sometimes don't realize how they imperil pedestrians.

People traveling by foot often feel under siege from both speeding cars and unpredictable bicycles.

Like many street-level conflicts, this one is about territory. Who owns the streets?"

http://www.aarp.org/livable-communities/getting-around/info-2016/why-bicycling-infrastructure-is-good-for-people-who-dont-ride-bikes.html?cmp=EMC-DSM-NLC-LC-HOMFAM-20170503_LivableCommunities_254800_336202-050317-F2-BicycleBenefits-Header-CTRL-2100002&encparam=%2BbUHUZ36YbpvM3joKy0j%2FTC%2BHO336rs01pL18F14eLY%3D