On-Street Bike Lanes along principal roads raise bicycle usage by providing official accommodation for the needs of cyclists and addressing concerns about their safety. Nationally, cities with at least one mile of bike lane for every three miles of arterial roadway have 3 to 10 times higher average bicycle commuting rates than cities with lesser ratios. 10 Count data from Santa Barbara indicate that bicycling has increased by 19 percent above the rate of population growth over a twenty-year period, with almost all of the increase on streets with striped bicycle lanes.11 Data collected in Oregon link bike lane striping to reduced accidents, corresponding with increased use.