Abstract Examining bicyclists' route choices provides valuable insights into the importance of road environments for bicycling. In this study, we examine the role of road factors, individual factors, and preference heterogeneity on route choice using two diverse and extreme cases in the U.S. The first case is bicycling to the University of California, Davis campus by students, faculty, and staff. This case represents the most bike friendly environment in the U.S. which affords a diverse bicycling population. The second case is bicycling to many destinations for many purposes in San Francisco, CA. It is more representative of a large U.S. city, but also has a relatively large bicycling mode share. It serves as an important case for examining the new innovative type of bicycling infrastructure that has been installed in North American cities over the past decade. Results suggest substantial within-city between-person heterogeneity in preference for road attributes and bicycling facilities as well as differences between contexts. Davisites show strong preferences for bike lanes and off-street paths and consistently choose routes of similar length to shortest routes indicating the need for suitable routes with minimal detours to support a large bicycling mode share. San Franciscans show strong preferences for conventional bike lanes on minor arterials, even stronger preferences for separated and protected bicycling facilities, and are willing to detour considerable distances to ride on them. Given large between-person differences within cities, we suggest usual valuations of bicycling facilities from elasticities and marginal rates of substitutions at the mean may need rethinking when applied to bike infrastructure planning.

中文翻译：

---

道路环境和骑自行车的路线选择：加州戴维斯和旧金山的案例

摘要 检查骑自行车者的路线选择为了解道路环境对骑自行车的重要性提供了宝贵的见解。在这项研究中，我们使用美国两个不同的极端案例来检验道路因素、个体因素和偏好异质性对路线选择的作用 第一个案例是学生、教职员工骑自行车前往加州大学戴维斯分校. 这个案例代表了美国最适合骑自行车的环境，它提供了多样化的骑自行车人群。第二种情况是在加利福尼亚州旧金山出于多种目的骑自行车前往许多目的地。它更能代表美国的大城市，但也有比较大的自行车出行方式份额。它是检验过去十年在北美城市安装的新型自行车基础设施的重要案例。结果表明，在偏好道路属性和自行车设施以及环境之间的差异方面，城市内的人与人之间存在显着的异质性。Davisites 对自行车道和街道外路径表现出强烈的偏好，并始终选择与最短路线长度相似的路线，这表明需要以最少的弯路选择合适的路线以支持大量的自行车模式份额。旧金山人对小干道上的传统自行车道表现出强烈的偏好，甚至更喜欢分离和受保护的自行车设施，并愿意绕道相当长的距离骑行。