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This feature class contains all of the region's road features and most of the road-related attribute fields from the year-2022 Roads & Highways export file from MDOT's Open Data Portal. The features in this layer are a subset of the gRH_SEMCOG layer, which contains rail and trail features in addition to roads. Wherever SEMCOG discovered clear errors in MDOT's attribute values, SEMCOG corrected those values in both the gRH_SEMCOG layer and the tRoad layer, so that these two layers would remain in sync with one another. For numeric fields containing both null values and zeros, with no difference in meaning between the two values, SEMCOG changed the null values to zeros to avoid potential confusion. To supplement MDOT's original attribute fields, SEMCOG added several other fields to tRoad. Additions include the fields SEG_ID, VER, SEMMCDL, and SEMMCDR, which can also be found in gRH_SEMCOG, plus several more fields not stored in that layer. 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