Travel Monitoring Analysis System Volume

The Travel Monitoring Analysis System (TMAS) - Volume dataset was compiled on December 31, 2025 and was published on March 23, 2026 from the Federal Highway Administration (FHWA), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The TMAS data included in this table have been collected by the FHWA from State DOTs through (temporal data representing each time period) permanent count data. DOTs determine what volume data is reported for any given month or day within the month. Each record in the volume data for the reported site, direction or lane is for the given day of record (it contains all 24 hours of data). The attributes are used by FHWA for its Travel Monitoring Analysis System and external agencies and have been intentionally limited to location referencing attributes since the core station description attribute data are contained within TMAS. The attributes in the Volume data correspond with the Volume file format found in Chapter 6 of the 2001 Traffic Monitoring Guide (https://doi.org/10.21949/1519109). A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529085旅行监测分析系统（Travel Monitoring Analysis System，简称TMAS）流量数据集编制于2025年12月31日，由美国联邦公路管理局（Federal Highway Administration，FHWA）于2026年3月23日发布，隶属于美国运输部（U.S. Department of Transportation，USDOT）/运输统计局（Bureau of Transportation Statistics，BTS）的国家交通地图集数据库（National Transportation Atlas Database，NTAD）。 本表格收录的TMAS数据，由FHWA通过永久计数数据（该数据为代表各监测时段的时序数据）从各州交通运输部（State DOTs）采集获取。各州交通运输部可自行确定需上报的任意指定月份或当月单日的流量数据内容。 本流量数据中，针对上报站点、通行方向或车道的每条记录，均对应指定的统计日（包含当日全部24小时的监测数据）。 本次公开的属性字段仅用于FHWA的旅行监测分析系统及外部机构；由于站点核心描述属性数据已包含于TMAS主数据集内，因此本次仅保留位置参考类属性字段。 本流量数据集的属性字段，与《2001年交通监测指南》（https://doi.org/10.21949/1519109）第六章规定的流量文件格式完全匹配。 如需查阅数据字典或其他属性信息说明，可访问链接：https://doi.org/10.21949/1529085。