AARP's Livable Communities initiative describes ten ways in which bicycle-friendly streets can be good even for persons who don't ride bicycles. 

Bicycle-friendly friendly streets can…

• Lead to safer streets for all roadway users
• Help make the sidewalks safer
• Clarify roadway operations for all users, reducing anxiety and anger that results from uncertainty about who should be where
• Help reduce congestion
• Help make streets and cities more attractive and livable
• Contribute positively to economic development and vitality
• Increase the existence and quality of affordable transportation
• Help transportation agencies make efficient use of funding in modernizing the transportation systems they are responsible for
• Reduce health care costs that result from sedentary, unhealthy lifestyles
• Help improve air quality, reduce green-house gases, and reduce noise pollutionAARP article outlines benefits of         bicycle-friendly streets for non-cyclists