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：城市公交怠速行为因排放问题加剧生态压力、造成经济效率低下并引发危害健康的医疗后果。这种频繁出现的不良驾驶模式在全球范围内累积影响巨大。为量化其规模，我们提出GRD-TRT-BUF-4I（怠速地面实况缓冲系统）——一个可扩展的实时检测系统，用于记录全球城市公交车队的地理位置与怠速时长。该系统通过通用交通数据规范实时获取车辆动态位置，每日从北美、欧洲、大洋洲和亚洲的50余个城市检测约20万起怠速事件。此实时数据旨在动态支持运营决策与车队管理，以降低怠速事件的发生频率与持续时间，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本数据用于排放建模、交通管理、线路规划及多时空尺度的城市可持续发展研究。