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：城市公交车辆怠速因排放问题导致生态压力、经济低效及危害健康的医疗后果。这种不良驾驶行为在全球范围内的频繁积累是巨大的。为量化其规模，我们提出GRD-TRT-BUF-4I（怠速基础真值）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馈送规范（GTFS）实时数据中的车辆实时位置，每日检测北美、欧洲、大洋洲和亚洲50多个城市的约20万次怠速事件。该实时数据旨在动态服务运营决策与车队管理，以实时降低怠速事件的频率和持续时间，并捕捉其累积效应。土木与交通工程师、城市规划师、流行病学家、政策制定者及其他利益相关方可在多种地理与时间尺度上，将其用于排放建模、交通管理、路线规划及其他城市可持续发展工作。