Commercial traffic in urban areas has not received the level of attention it deserves. Notwithstanding recent research on freight trip generation, other components of commercial traffic, such as commercial service traffic, have been largely overlooked. This is ironic, as the service sector represents a major and growing portion of urban and metropolitan economies. The research reported in this paper intends to help fill an important research gap through analyses of unique survey data collected by the authors. To this effect, the research comprehensively characterizes service visits to commercial establishments—in terms of frequency, purpose, duration, time of day, and other characteristics—by industry sector for two metropolitan areas. In addition, the authors estimated econometric models that express the number of service trips to commercial establishments as a function of the economic characteristics of the establishment and assessed the geographic transferability of the models obtained. To gain insight into the overall magnitude of service-related traffic, the models were applied to publicly available data to estimate the service activity in American cities of various sizes. The resulting service traffic are then used to estimate of parking requirements of service and freight vehicles for the most congested ZIP codes at these cities. The paper ends with a discussion of chief findings and policy implications.

城市地区的商业交通尚未得到应有的重视。尽管最近对货运行程的产生进行了研究，但是商业交通的其他组成部分，例如商业服务交通，却被大大地忽略了。具有讽刺意味的是，因为服务业代表着城市和大都市经济的主要且正在增长的部分。本文报道的研究旨在通过分析作者收集的独特调查数据来填补重要的研究空白。为此，该研究从频率，目的，持续时间，一天中的时间以及其他特征方面，按行业划分了两个大都市地区的商业访问服务的特征。此外，作者估计了计量经济模型，该模型将商业机构的服务行程次数表示为该机构的经济特征的函数，并评估了所获得模型的地理可转移性。为了深入了解与服务相关的流量的总体规模，将模型应用于可公开获取的数据，以估算各种规模的美国城市中的服务活动。然后，将得出的服务流量用于估算这些城市中最拥挤的邮政编码的服务和货运车辆的停车需求。本文最后讨论了主要发现和政策含义。为了深入了解与服务相关的流量的总体规模，将模型应用于可公开获取的数据，以估算各种规模的美国城市中的服务活动。然后，将得出的服务流量用于估算这些城市中最拥挤的邮政编码的服务和货运车辆的停车需求。本文最后讨论了主要发现和政策含义。为了深入了解与服务相关的流量的总体规模，将模型应用于可公开获取的数据，以估算各种规模的美国城市中的服务活动。然后，将得出的服务流量用于估算这些城市中最拥挤的邮政编码的服务和货运车辆的停车需求。本文最后讨论了主要发现和政策含义。