Australia’s first Mobility as a Service (MaaS) trial commenced in April 2019 in Sydney, running for two years. The objective of the trial is at least twofold – to assess interest in various MaaS subscription plans through bundling public transport, rideshare, car share and car rental with varying financial discounts and monthly subscription fees, in contrast to pay as you go (PAYG); and to assess the extent to which the use of the private car might change following a subscription to a monthly mobility bundle. This paper assesses the second objective by investigating the potential for changes in monthly car use in the presence of a MaaS program. There is no previous research that we are aware of that has tested the relationship between MaaS bundle uptake and private car use. The paper develops a joint discrete-continuous model system to explain the choice between monthly bundles and PAYG, and subsequently, the total monthly car kilometres. Controlling for monthly differences due to other influences such as seasonal travel activity, the findings suggest that the offered bundles do have an encouraging impact on private car use. Within the limits of what was tested under the Sydney MaaS trial, indicative evidence suggests that MaaS has the potential to change travel behaviour in a way aligned with sustainability objectives, although this evidence should not be taken as suggesting that MaaS is a commercially viable mobility strategy.

澳大利亚的第一项移动即服务（MaaS）试验于2019年4月在悉尼开始，为期两年。该试验的目的至少是双重的-通过捆绑公共交通，乘车共享，汽车共享和汽车租赁来评估对各种MaaS订阅计划的兴趣，并提供不同的财务折扣和月度订阅费用，而不是随用随付（PAYG）；并评估在订阅了每月出行捆绑服务后私家车的使用可能会发生变化的程度。本文通过调查存在MaaS计划的情况下每月汽车使用量变化的潜力来评估第二个目标。我们之前没有任何已知的研究可以测试MaaS捆绑使用率和私家车使用之间的关系。本文开发了一个联合离散连续模型系统，以解释月度捆绑包和现收现付制之间的选择，以及随后的月度总车公里数。研究结果控制了由于其他因素（如季节性旅行活动）引起的每月差异，发现所提供的捆绑包确实对私家车使用产生了令人鼓舞的影响。在悉尼MaaS试验所测试的范围内，指示性证据表明MaaS有可能以与可持续发展目标一致的方式改变出行行为，尽管该证据不应被视为暗示MaaS是商业上可行的出行策略。研究结果表明，所提供的捆绑包确实对私家车使用产生了令人鼓舞的影响。在悉尼MaaS试验所测试的范围内，指示性证据表明MaaS有可能以与可持续发展目标一致的方式改变出行行为，尽管该证据不应被视为暗示MaaS是商业上可行的出行策略。研究结果表明，所提供的捆绑包确实对私家车使用产生了令人鼓舞的影响。在悉尼MaaS试验所测试的范围内，指示性证据表明MaaS有可能以与可持续发展目标一致的方式改变出行行为，尽管该证据不应被视为暗示MaaS是商业上可行的出行策略。