According to League of American Bicyclists analysis of Census Bureau data, between 2005 and 2017, 84% of the 70 largest cities in the US experienced a positive trend of bicycle commuting. Between 2007 and 2018 there was also a modest increase in the percent of commuters who walk, averaged across all states and the largest cities. City planners and policymakers have begun to consider ways to safely accommodate increasing numbers of vulnerable active transportation road users. For instance, some cities have established goals for reaching a designated number of miles of protected bike lane networks, and some have begun to implement reduced speed limits within specific areas with the goal of improving safety.