The introduction of dock-less e-bike-share service can reduce vehicle miles traveled (VMT) and related greenhouse emissions if it substitutes for car travel. We develop a framework for estimating vehicle miles reduced from the introduction of bike-share service. We apply this framework for the Sacramento, CA region using system-level data on dock-less e-bike-share trips and individual-level data collected through a user survey. Our findings show that the daily car substitution rate, including both “private car” and “ride-haling,” was 28% on weekdays. This dock-less bike-share service was responsible for an estimated VMT reduction of 2,131 vehicle miles per day in total and 0.79 miles per bike-share trip on average across the service region on weekdays. The results of this analysis are important in assessing the value of the system. The methodologies developed in this study can be applied in other regions to assess the impact of their bike-share systems.

引入无码头电动自行车共享服务可以减少车辆行驶里程 (VMT) 和相关的温室气体排放，如果它替代汽车出行的话。我们开发了一个框架来估算引入自行车共享服务后减少的车辆里程。我们将此框架应用于加利福尼亚州萨克拉门托地区，使用无码头电动自行车共享旅行的系统级数据和通过用户调查收集的个人级数据。我们的调查结果显示，工作日的每日汽车替代率（包括“私家车”和“网约车”）为 28%。这种无码头自行车共享服务估计每天减少 2,131 英里的车辆行驶里程，工作日平均每次自行车共享行程减少 0.79 英里。该分析的结果对于评估系统的价值很重要。