Description: In general, each point shows a numbered ramp along statewide highways, per the direction of the highway (for instance, for a Northbound-Southbound highway, there is one point record for a Northbound exit and one point record for a Southbound exit). The DIR field indicates the directionality associated with the feature. In some cases, a single point may represent both the on- and off-ramp. Per the Caltrans Trash Assessment Methodology (TAM), 2024 trash generation rates were applied from the Combined Score methodology, where calculated; where the Combined Score was not calculated, the trash generation rate of the applicable adjacent highway segment was applied. Please refer to the most recent TAM for more information on trash generation ratings and their application. Point locations are as received from Caltrans. Each record is coded with the district, county, and route information, along with postmile prefix (if any), postmile, and postmile suffix (if any), along with the exit number and intersection name. Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage and Resource > Fields sections of this metadata for additional details.This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Description: In general, each point shows the location of a rest area along a state highway. Per the Caltrans Trash Assessment Methodology (TAM), all rest areas are categorized as Significant Trash Generating Areas (STGAs). Please refer to the most recent TAM for more information on trash generation ratings and their application. Each record is coded with basic locational information including the district, county, and route information, along with characteristics such as name and side of highway ("alignment"). Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage and Resource > Fields sections of this metadata for additional details.This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Description: In general, each point shows the general location of a park and ride area along state highways. Each record is coded with basic locational information including the district, county, and route information, along with characteristics such as name and location description, and number of parking spaces. Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage and Resource > Fields sections of this metadata for additional details.Per the Caltrans Trash Assessment Methodology (TAM), all Park and Ride areas are categorized as Significant Trash Generating Areas (STGAs). Please refer to the most recent TAM for more information on trash generation ratings and their application. This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Name: Statewide Highways - South and West ("left") direction
Display Field: CO
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: The feature geometry for Statewide Highways are centerlines that contain directional attributes. Therefore, to display attributes based on directionality, features must be symbolized separately using related directional fields and/or attributes. The "left" direction corresponds to southbound and westbound features; the "right" direction corresponds to northbound and eastbound features. The DIR field indicates the basic directionality associated with the feature.Per the Caltrans Trash Assessment Methodology (TAM), highway segments were attributed with 2024 trash generation ratings based on Combined Score, Overland Visual Trash Assessment (OVTA), or Integrated Maintenance Management System (IMMS) methodologies. Please refer to the most recent TAM for more information on trash generation ratings and their application.2024 trash generation ratings are split between LTrashGenRating2024 and RTrashGenRating2024 fields. Features in this map are displayed using an "offset" to help the user visualize left vs. right directional features and their associated trash generation ratings. Each highway centerline record is also coded with the district, county, and route information, along with postmile prefix (if any), postmile, and postmile suffix (if any). Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage, Resource > Lineage > Process Step, and Resource > Fields sections of this metadata for additional details. This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Name: Statewide Highways - North And East ("right") direction
Display Field: CO
Type: Feature Layer
Geometry Type: esriGeometryPolyline
Description: The feature geometry for Statewide Highways are centerlines that contain directional attributes. Therefore, to display attributes based on directionality, features must be symbolized separately using related directional fields and/or attributes. The "left" direction corresponds to southbound and westbound features; the "right" direction corresponds to northbound and eastbound features. The DIR field indicates the basic directionality associated with the feature.Per the Caltrans Trash Assessment Methodology (TAM), highway segments were attributed with 2024 trash generation ratings based on Combined Score, Overland Visual Trash Assessment (OVTA), or Integrated Maintenance Management System (IMMS) methodologies. Please refer to the most recent TAM for more information on trash generation ratings and their application.2024 trash generation ratings are split between LTrashGenRating2024 and RTrashGenRating2024 fields. Features in this map are displayed using an "offset" to help the user visualize left vs. right directional features and their associated trash generation ratings. Each highway centerline record is also coded with the district, county, and route information, along with postmile prefix (if any), postmile, and postmile suffix (if any). Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage, Resource > Lineage > Process Step, and Resource > Fields sections of this metadata for additional details. This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Description: This feature layer was created per a specific request from Caltrans to display features that aid the map user by showing high-level, generalized context for sources of trash generation ratings along highway corridors. Because this layer is a generalized polygon layer, it does not contain all the attribute or directional detail that is contained in Statewide_HighwayCenterlines. 2024 trash generation ratings have been attributed for Caltrans highway segments as required by Attachment E of Order 2022-0033-DWQ in the Statewide_HighwayCenterlines feature layer; please refer to that layer and its metadata for further details.
Copyright Text: Caltrans; Michael Baker International
Description: The feature geometry for Statewide Highways are centerlines that contain directional attributes. Therefore, to display attributes based on directionality, features must be symbolized separately using related directional fields and/or attributes. The "left" direction corresponds to southbound and westbound features; the "right" direction corresponds to northbound and eastbound features. The DIR field indicates the basic directionality associated with the feature.Per the Caltrans Trash Assessment Methodology (TAM), highway segments were attributed with 2024 trash generation ratings based on Combined Score, Overland Visual Trash Assessment (OVTA), or Integrated Maintenance Management System (IMMS) methodologies. Please refer to the most recent TAM for more information on trash generation ratings and their application.2024 trash generation ratings are split between LTrashGenRating2024 and RTrashGenRating2024 fields. Features in this map are displayed using an "offset" to help the user visualize left vs. right directional features and their associated trash generation ratings. Each highway centerline record is also coded with the district, county, and route information, along with postmile prefix (if any), postmile, and postmile suffix (if any). Additional attributes related to stormwater compliance have been added. Refer to the Resource > Lineage, Resource > Lineage > Process Step, and Resource > Fields sections of this metadata for additional details. This feature layer does not include areas within CA Regional Water Quality Control Board 2 or Los Angeles Trash Total Maximum Daily Loads (TMDLs); for more information on those areas please refer to the California Water Boards website at https://www.waterboards.ca.gov/.
Description: LA Trash TMDLs are designed to attain specific water quality standards. For more information please refer to the California Water Boards TMDL web page at https://www.waterboards.ca.gov/losangeles/water_issues/programs/tmdl/. LA Trash TMDL boundaries are excluded from Caltrans statewide trash compliance efforts.
Copyright Text: California State Water Resources Control Board
Description: This feature layer represents Federal Highway Administration (FHWA)-approved Caltrans adjusted urban area boundaries in California. Each record is attributed with the general place name. For the purposes of Caltrans trash assessment and stormwater compliance efforts, areas with population 50,000 or greater are classified as urban; areas outside this threshold are classified considered non-urban.
Description: The Municipal Storm Water Permitting Program regulates storm water discharges from municipal separate storm sewer systems (MS4s). Municipal or urban areas commonly include large impervious surfaces which contribute to an increase in stormwater runoff. Under Phase I, which started in 1990, the Regional Water Quality Control Boards have adopted National Pollutant Discharge Elimination System General Permit (NPDES) storm water permits for medium (serving between 100,000 and 250,000 people) and large (serving 250,000 people) municipalities. For more information please reference the State Water Resources Control Board Phase I MS4 Permits web page at https://www.waterboards.ca.gov/water_issues/programs/stormwater/phase_i_municipal.html.
Copyright Text: California State Water Resources Control Board
Description: The Municipal Storm Water Permitting Program regulates storm water discharges from municipal separate storm sewer systems (MS4s). Municipal or urban areas commonly include large impervious surfaces which contribute to an increase in stormwater runoff. On April 30, 2003 as part of Phase II, the California State Water Resources Control Board issued a General Permit for the Discharge of Storm Water from Small MS4s (WQ Order No. 2003-0005-DWQ) to provide permit coverage for smaller municipalities (population less than 100,000), and non-traditional Small MS4s which includes Caltrans. For more information please reference the State Water Resources Control Board Phase II Small MS4 permit web page at https://www.waterboards.ca.gov/water_issues/programs/stormwater/phase_ii_municipal.html.
Copyright Text: California State Water Resources Control Board
Description: The DISTRICT feature class is a polygon coverage representing the California Department of Transportation (Caltrans) district boundaries. There are 12 Caltrans Districts in California.
Description: The boundaries of the nine California Regional Water Quality Control Boards are derived from watershed boundaries in the The California Watershed Map (CALWATER version 2.2). Calwater 2.2 is a set of standardized watershed boundaries meeting standardized delineation criteria. For more information please visit the Regional Water Quality Board web page at https://www.waterboards.ca.gov/about_us/contact_us/rwqcbs_directory.html.
Copyright Text: California State Water Resource Control Board, Tierra Data Systems
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