Urban transit bus idling is a contributor to ecological stress, economic inefficiency, and medically hazardous health outcomes due to emissions. The global accumulation of this frequent pattern of undesirable driving behavior is enormous. In order to measure its scale, we propose GRD-TRT- BUF-4I (Ground Truth Buffer for Idling) an extensible, realtime detection system that records the geolocation and idling duration of urban transit bus fleets internationally. Using live vehicle locations from General Transit Feed Specification (GTFS) Realtime, the system detects approximately 200,000 idling events per day from over 50 cities across North America, Europe, Oceania, and Asia. This realtime data was created to dynamically serve operational decision-making and fleet management to reduce the frequency and duration of idling events as they occur, as well as to capture its accumulative effects. Civil and Transportation Engineers, Urban Planners, Epidemiologists, Policymakers, and other stakeholders might find this useful for emissions modeling, traffic management, route planning, and other urban sustainability efforts at a variety of geographic and temporal scales.

翻译：城市公交车辆怠速行为因排放问题，已成为生态压力、经济效率低下及医学健康危害的诱因。这种不良驾驶行为的频繁模式在全球范围内累积效应极为显著。为量化其规模，我们提出GRD-TRT-BUF-4I（怠速基准真值）系统——一个可扩展的实时检测系统，用于记录国际城市公交车队的地理位置与怠速时长。该系统利用通用公交数据规范（GTFS）实时车辆定位数据，每日可从北美、欧洲、大洋洲及亚洲的50余个城市中检测约20万次怠速事件。该实时数据旨在动态服务于运营决策与车队管理，以在事件发生时降低怠速频率与时长，同时捕捉其累积效应。土木与交通工程师、城市规划师、流行病学家、政策制定者及其他相关方可将其用于排放建模、交通管理、路线规划及各时空尺度下的城市可持续性研究。