How to make city cycling--the most sustainable form of urban transportation--safe, practical, and convenient for all cyclists.Cycling is the most sustainable mode of urban transportation, practical for most short- and medium-distance trips--commuting to and from work or school, shopping, visiting friends, going to the doctor's office. It's good for your health, spares the environment a trip's worth of auto emissions, and is economical for both public and personal budgets. Cyc