This document discusses the concept of "nudge theory" from behavioral science, which explains how subtle cues can influence individuals' decisions. It proposes using nudge theory to increase sales of bicycles over motorcycles for short-distance travel. A survey found that those under 18 use bicycles most. Strategies suggested include companies providing employee bicycles, societies offering bicycles on weekends, and businesses renting bicycles, to familiarize more people with bicycling and its health and environmental benefits. The key is appealing to people's desire to save money.