Transportation.Roads is a multi-purpose statewide roads dataset for cartography and range based-address location. This dataset is also used as the base geometry for deriving the GIS-representation of UDOT’s highway linear referencing system (LRS). A network analysis dataset for route-finding can also be derived from this dataset.

Transportation.Roads utilizes a data model based on Next-Generation 911 standards and the Federal Highway Administration's All Roads Network Of Linear-referenced Data (ARNOLD) reporting requirements for state DOTs. AGRC adopted this data model on September 13th, 2017.

To see specific information about the data model including field names and descriptions, data types, coded value domains, and data model updates, see the data model spreadsheet and the corresponding tabs for update notes and coded value domains. The color-coded section titled Addressing is primarily maintained by the local stewards, where as the section titled DOT/FHWA is primarily maintained by UDOT. AGRC spatially assigns fields in the section titled Placename/Area, based on current SGID polygon boundaries. AGRC also generates the UNIQUE_ID field based on the segment's location in the US National Grid, with the street name then tacked on. The UNIQUE_ID field is static and is AGRC's current, ad hoc solution to a persistent global id.

This data model is meant to suggest 'best practices'. It is not the intent that all stewards will change their current data management process to match this standard, but rather that stewards will evaluate their current practices to see how well their data 'maps' to this schema for data sharing and Next Generation 911 preparedness.

Comments, questions, compliments, or concerns can be directed to Greg Bunce from AGRC at GBunce@utah.gov or 801-349-0039.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter coordinate precision). The statewide roads dataset is maintained by AGRC in partnership with local government, the Utah 911 Committee, and UDOT.

Related Resources

• Road Centerlines: Data Model
• Road Centerlines Schema-Only: File Geodatabase

Transportation.UDOTRoutes_LRS is a polylineM dataset wherein each state and federal route is a single feature whose vertices include a milepost measure coordinate.

Major routes are named using UDOT’s 5 character convention (ex. 0089P is US 89 in the positive direction). Ramps and collectors are also included and have 11 character identifiers (ex. 0080PR18501 is the east bound off ramp at exit 185 on I-80). ‘P’ direction routes are those in the direction of increasing milepost values. ‘N’ direction routes for the Utah’s 5 freeways (0015, 0070, 0080, 0084, 0215) should be ignored (use ‘X’ instead) except when working with UDOT-specific LRS event features.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter x,y coordinate precision; 0.001 mile m coordinate precision). The GIS dataset representing the UDOT LRS is stewarded by UDOT with assistance from DTS, AGRC and local government.

The CARTO code can be used to query subsets or classify different types of UDOT routes:

• 1: Interstate highways
• 2: US highways
• 3: State highways
• 5: Miscellaneous routes associated with interchanges
• 6: Ramps, Interstates
• 7: Ramps, US Highways
• 8: Ramps, State highways
• 9: Local routes, federal aid eligible
• I: Institutional roads designated as state highways

Related Resource

• data.udot.utah.gov
• Read about the changes coming to the LRS

Transportation.UDOTMileposts represents the approximate location of state and federal highway mileposts as a single point. This dataset is derived directly from SGID10.Transportation.UDOTRoutes_LRS.

See this info sheet to learn more about the difference between mile reference posts that are seen on the side of the road and linear referencing system mile point measures (milepost points).

Major routes are named using UDOT’s 5 character convention (ex. 0089P is US 89 in the positive direction).  ‘P’ direction routes are those in the direction of increasing milepost values. ‘N’ direction routes for the Utah’s 5 freeways (0015, 0070, 0080, 0084, 0215) should be ignored (use ‘X’ instead) except when working with UDOT-specific LRS event features.

Per UDOT policy the actual location of mileposts can vary up to 50 feet, from the measured position where intersections and physical infrastructure make a more 'true' positioning impractical or undesirable.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter coordinate precision). The GIS dataset representing the UDOT LRS is stewarded by UDOT with assistance from DTS, AGRC and local government.

Transportation.UDOTTenthMileRefPoints represents the approximate location of state and federal highway tenth of a mile locations as a single point. This dataset is derived directly from SGID10.Transportation.UDOTRoutes_LRS.

See this info sheet to learn more about the difference between mile reference posts that are seen on the side of the road and linear referencing system mile point measures (milepost points).

Major routes are named using UDOT’s 5 character convention (ex. 0089P is US 89 in the positive direction). ‘P’ direction routes are those in the direction of increasing milepost values. ‘N’ direction routes for the Utah’s 5 freeways (0015, 0070, 0080, 0084, 0215) should be ignored (use ‘X’ instead) except when working with UDOT-specific LRS event features.

Per UDOT policy the actual location of tenth of mile locations can vary up to 50 feet, from the measured position where intersections and physical infrastructure make a more ‘true’ positioning impractical or undesirable.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter coordinate precision). This dataset was assembled by UDOT for general purpose cartography.

Transportation.Roads_FreewayExits contains point locations for each freeway and limited access highway exit along with the exit number, name, associated route, and connected streets/routes.

The EXITNAME field provides the primary route name and exit number plus the connecting route number or street name and place name carried by the exit sign. Route number and exit number are also carried in separate fields.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter coordinate precision). This dataset was assembled by AGRC from resources provided by UDOT, as a resource for 911 dispatch and for general map reference.

Transportation.RoadsShieldLines consists of highway route lines edited to best enable non-redundant, dynamic label rendering of highway shields for freeways, US highways, and state highways.

In ArcMap, define a label class for each CLASS field value. 1 is for freeways, 2 for US highways, and 3 is for state highways. Each label class should use a SQL expression to define the class and the default class should be disabled or deleted.

When defined labeling properties are defined properly, the minimum number of freeway and highway shields should be displayed without introducing ambiguity.

The native spatial reference for this dataset is UTM Zone 12N, NAD83 (0.01 meter coordinate precision). This dataset was assembled by AGRC for general purpose cartography.