Accessibility is a key concept in transport planning. Most studies only focus on specific activity types, but for policy making it is more relevant to aggregate accessibility overall or at least several activity types. However, to the best of our knowledge, there is no study that combines accessibilities for different activity types. Since access to spatially separated activities is one dimension of quality of life, and activity types are not equally important for quality of life, we propose a methodology that is based on weighing activity types according to their relative importance to quality of life to assess overall accessibility. Four principles are adopted to develop the weighting factors: 1) the human needs the activity types satisfy; 2) the activity types' contribution to quality of life; 3) the activity types' trip frequency; 4) further modifications, based on principles such as whether the activity types are needed in emergent situations, and social values and policy preferences. We combine these four principles and apply the methodology in a case study focused on Germany.

中文翻译：

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结合不同活动类型的可访问性：方法和案例研究

可达性是运输计划中的关键概念。大多数研究只关注特定的活动类型，但是对于政策制定而言，它与总体可访问性或至少几种活动类型更相关。但是，据我们所知，尚无一项研究将各种活动类型的可及性结合在一起。由于获得空间上分离的活动是生活质量的一个维度，并且活动类型对生活质量并非同等重要，因此我们提出了一种方法，该方法基于权重取决于活动类型对生活质量的相对重要性来评估总体可访问性。制定加权因子采用四个原则：1）活动类型满足的人类需求；2）活动类型对生活质量的贡献；3）活动类型的出行频率；4）根据诸如紧急情况下是否需要活动类型以及社会价值和政策偏好等原则进行进一步修改。我们结合了这四个原则，并在针对德国的案例研究中应用了该方法。