There is a proposal of adding new bike barriers to the bike lane on 15th Street in downtown Denver. [Getty Images]

DENVER, CO - MARCH 10 : There is a proposal of adding new vertical bike barriers to the existing bike lane on 15th Street in downtown Denver. A biker uses the bike lane on Arapahoe Street while crossing 15th Street on Monday, March 10, 2014. The barriers on 15th Street go into place later this spring. (Denver Post Photo by Cyrus McCrimmon)

Denver Post Cyrus McCrimmon