 Cities across the U.S. are using billions of dollars in federal funding on projects intended to make streets safer. NPR's Joel Rose reports that sometimes accelerating conflict with local residents who don't like the changes. The narrow old streets of Lancaster, Pennsylvania are getting an update. Mayor Deneen Sirachi led a tour for Transportation Secretary Pete Buttigieg last month, showing off the new protected bike lanes and other changes the city is making with millions in federal funding.