This paper explores the travel behavior of older adults in comparison to younger adults using the 2017 U.S. National Household Travel Survey Georgia Add-on. We employ a discrete mode choice model to examine how the relationships between travel outcomes and socioeconomic, trip, and built environment characteristics vary by age. Travel modes are categorized into automobile, public transit, and non-motorized modes (i.e., walking and biking). The analysis reveals significant differences in factors related to non-auto mode travel outcomes between age groups. The presence of health conditions is associated with a lower likelihood of older adults choosing non-auto modes, and this effect intensifies with age. The association between trip purposes and travel outcome also varies; home-based-other purpose trips, such as healthcare appointments or community activities, are associated with a higher probability of older adults choosing non-motorized modes compared to other trip purposes. Residential density is more of a factor for older adults' non-auto mode choices, and older adults living in non-auto mode supportive environments are more likely to maintain non-auto mode usage. The study further finds that older adults and those with health conditions live and travel in less dense, less walkable areas than their counterparts, which makes it difficult for them to have viable non-auto transportation options. To expand mobility options for older adults, planners should design programs for older adults with health conditions and provide services for those who can no longer drive or without access to automobiles. Additionally, considering built environment conditions and the varying needs of individuals based on trip purposes is recommended to satisfy the mobility needs of older adults in accordance with their lifestyles.

中文翻译：

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影响格鲁吉亚老年人出行方式选择的社会经济和建筑环境因素分析


本文使用 2017 年美国全国家庭旅行调查 Georgia Add-on 探讨了老年人与年轻人的旅行行为。我们采用离散模式选择模型来检查旅行结果与社会经济、旅行和建筑环境特征之间的关系如何随年龄变化。出行方式分为汽车、公共交通和非机动模式（即步行和骑自行车）。分析揭示了不同年龄组之间与非自动模式出行结果相关的因素存在显著差异。健康状况的存在与老年人选择非自动模式的可能性较低有关，并且这种影响会随着年龄的增长而加剧。旅行目的和旅行结果之间的关联也各不相同;与其他旅行目的相比，以家庭为基础的其他目的旅行，例如医疗保健预约或社区活动，与老年人选择非机动模式的可能性更高有关。住宅密度是老年人选择非自动模式的一个因素，而生活在非自动模式支持环境中的老年人更有可能保持非自动模式的使用。该研究进一步发现，与同龄人相比，老年人和有健康状况的人在密度较低、不太适合步行的地区生活和旅行，这使得他们很难拥有可行的非汽车交通选择。为了扩大老年人的行动选择，规划者应该为有健康状况的老年人设计计划，并为那些不能再开车或无法使用汽车的人提供服务。 此外，建议考虑建筑环境条件和个人基于旅行目的的不同需求，以满足老年人的生活方式的移动需求。