In order to determine the FGTS classification, the annual tons of freight carried is estimated from truck traffic count data, which is converted into average weights by truck type. Estimates may be used for some of the calculations when actual truck counts are not available. The FGTS Update team reviews tabular and graphic information for errors and inconsistencies in FGTS classification. Adjustments are made to correct anomalies, ensure route continuity, and confirm consistency across jurisdictional boundaries.
State route classifications are provided by the WSDOT Transportation Data Office (TDO). Average annual truck traffic and tonnage for state highways is obtained from available permanent and short locations. Counts are converted to gross annual tons.
- State routes (pdf 86 kb)
Note: Tonnage and truck volumes are averages for the highway section. Within the section, a variety of data sources may have been used to set the average, not just the data from a single location. Higher and lower values may be identified at spot locations within the section.
County road classifications are provided by the County Road Administration Board (CRAB) in the annual County Freight and Goods System (CFGS). Classifications are based on the same methodology used for state route designation.
City street classifications are provided by the appropriate city or town having jurisdiction of the roadway. The Association of Washington Cities (AWC) and WSDOT contact all cities and towns for updated classifications of city streets within their jurisdiction. Guidance is provided to promote consistent methodology.
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