In recent decades, the main focus of public transport operations has been increasing its speed. Increasing speed not only allows for faster trips but also a higher frequency with the same fleet size, thus reducing waiting times and crowdedness inside the vehicles. This interest in speed has ignored a second key dimension in the level of service: reliability. In this article, we provide a review of a full range of impacts of an unreliable public transport service. We show how regularizing headway could improve level of service beyond the gains of simply increasing the operational speed. Regular headways positively affect comfort, reliability, travel and wait time, operational costs, and even some urban impacts of bus services. Thus, the focus for public transport agencies and operators should bend into reliability’s direction. This is fundamental for making public transport an attractive travel alternative, and therefore must become a core goal for urban sustainability.

中文翻译：

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不可靠的公共交通服务成本的综合视角

近几十年来，公共交通运营的主要重点一直是提高速度。提高速度不仅可以加快行程，而且可以在车队规模相同的情况下提高频率，从而减少等待时间和车辆内部的拥挤程度。这种对速度的兴趣忽略了服务水平的第二个关键维度：可靠性。在本文中，我们对不可靠的公共交通服务的全方位影响进行了回顾。我们展示了调整进度如何能够提高服务水平，而不仅仅是提高运营速度的收益。定期车距对舒适度、可靠性、旅行和等待时间、运营成本，甚至公交服务的一些城市影响都有积极影响。因此，公共交通机构和运营商的重点应该转向可靠性的方向。