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Tiger Roads Data

Each digital dataset name below links to a complete data layer description. On each page you will find metadata and links to free data download.

Feb 21, 2014  The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB).

The date below the data layer name on each page represents the month and year of the most recent update. For more details, especially at the feature level, see the contact information in the Maintenance section of each page.

See the Data Overview for attribution, citation language and spatial reference information.

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TABLE OF CONTENTS

Census/Demographic Data Coastal and Marine Features Conservation/Recreation Cultural Resources Environmental Monitoring Image Data Indexes Infrastructure Physical Resources Political/Administrative Boundaries Regulated Areas Miscellaneous

Census/Demographic Data

Blocks, Block Groups, Tracts and their associated tables, and TIGER Roads for all years.
For 2000 and 2010, additional derived datasets include:
- Environmental Justice Populations
- Hydrography
- Municipal Boundaries

Coastal and Marine Features

  • MassDEP Eelgrass Mapping Project(Updated 8/9/2018)

Conservation/Recreation

  • Office of Fishing and Boating Access Sites(Updated 10/8/2019)
  • Protected and Recreational Open Space(Updated 2/5/2020)

Cultural Resources

Environmental Monitoring

  • MassDEP Water Quality Monitoring Stations(Updated June 13, 2019)

Image Data

Ortho Imagery (Aerial Photography)

  • USGS Color Ortho Imagery (2019)(New! - 2/18/2020)

Scanned Reference Maps

Elevation

Environmental Analysis

Indexes

Infrastructure

Transportation

  • MassDOT Roads (Updated 11/29/2018)
  • MBTA Rapid Transit(Updated 1/7/2020)
  • RMV Locations(Updated 2/5/2019)

Other Facilities and Structures

  • Acute Care Hospitals(Updated 12/27/2018)
  • Building Structures (2-D)(Updated 8/28/2019)
  • Colleges and Universities(Updated 6/5/2018)
  • Community Health Centers(Updated 10/31/2019)
  • Courthouses(New - 1/18/2019)
  • Long Term Care Residences(Updated 5/7/2019)
  • Master Address Data(Updated Continually)
  • Places of Worship(New - 11/13/2019)
  • Prisons(Updated 1/4/2019)
  • Public Water Supplies(Updated 12/9/2019)
  • Schools (Pre-K through High School)(Updated 6/6/2019)

Physical Resources

Land Use/Land Cover, Geological/Geophysical, Atmospheric

  • Land Cover/Land Use (2016)(New - 5/22/2019)

Elevation and Derived Products

Inland Water Features

  • Inland Water Bathymetry (1:10,000)(Updated 8/12/2019)
  • MA DFW Coldwater Fisheries Resources(Updated 9/9/2019)
  • MassDEP Hydrography (1:25,000)(Updated 12/19/2019)
  • USGS Hydrography (1:100,000)(Updated 12/19/2019)
  • USGS Major Ponds and Major Streams(Updated 12/19/2019)

Political/Administrative Boundaries

  • Community Boundaries (Cities and Towns) from Survey Points(Updated 9/3/2019)
  • DCR Mass Parks Regions(New - 6/17/2019)
  • DFS State Fire Districts(New - 10/3/2019)
  • DFS State HazMat Districts(New - 10/3/2019)
  • Executive Office of Health & Human Services Regions(Updated 3/14/2019)
  • Governor's Council Districts (2012)(Updated 1/7/2019)
  • MassDOT Highway Districts(New - 6/21/2019)
  • Massachusetts House Legislative Districts(Updated 1/7/2019)
  • Massachusetts Senate Legislative Districts(Updated 1/7/2019)
  • Public School Districts(Updated 6/6/2019)
  • Registries of Deeds Districts(Updated 1/7/2019)
  • Standardized Assessors' Parcels(Updated 3/23/2020)
  • U.S. Congressional Districts (116th) (Updated 1/7/2019)
  • Wards and Precincts(New - 1/29/2019)
  • ZIP Codes (5-Digit) from HERE (Updated 11/26/2018)

Regulated Areas

  • MassDEP Ground Water Discharge Permits(Updated 4/7/2020)
  • MassDEP Oil and/or Hazardous Material Sites with Activity and Use Limitations (AUL)(Updated 4/7/2020)
  • MassDEP Tier Classified Chapter 21E Sites(Updated 4/7/2020)
  • MassDEP Wellhead Protection Areas (Zone II, Zone I, IWPA)(Updated 12/9/2019)
  • Non-Potential Drinking Water Source Areas(Updated 2/7/2019)

Miscellaneous

Items

Contributor
Modified Date
2020-04-07
Release Date
Identifier
fc73d74e-d32d-42db-a401-e5032c851425
License
Author
Contact Email
Public Access Level
Data Quality
November 2018
This layer is the official state-maintained street transportation dataset available from MassGIS. It represents all the public and many of the private roadways in Massachusetts and includes designations for Interstate, U.S. and State routes.
Download these layers with ArcGIS layer files:
Shapefiles File Geodatabase (9.3)

Formerly known as the Massachusetts Highway Department (MHD)Roads, then the Executive Office of Transportation - Office of Transportation Planning (EOT-OTP) Roads, the MassDOT Roads layer includes linework from the 1:5,000 road and rail centerlines data that were interpreted as part of the Black and White Digital Orthophoto project. The Massachusetts Department of Transportation - Office of Transportation Planning, which maintains the primary source for this layer, continues to add linework from municipal and other sources and update existing linework using the most recent color orthophoto imagery as a base. The attribute table includes many 'road inventory' fields maintained in MassDOT's linear referencing system. See the Attributes section below for more details.

The data layer published in November 2018 is based on the MassDOT 2017 year-end Road Inventory layer and results of a 2014-15 MassDOT-Central Transportation Planning Staff project to conflate street names and other attributes from MassGIS' 'base streets' to the MassDOT Road Inventory linework. The base streets are continually maintained by MassGIS as part of the NextGen 911 and Master Address Database projects. MassGIS staff reviewed the conflated layer and added many base street arcs digitized after the completion of the conflation work. Other edits included modifying some linework in areas of recent construction and roadway reconfiguration to align to 2017-18 Google ortho imagery, and making minor fixes to attributes and linework.

The following feature classes are available:

  • EOTROADS_ARC (aka 'All Roads') is the full statewide layer. Created from this layer are two subsets that may be useful in smaller-scale mapping:
  • EOTMAJROADS_ARC comprises majorroads (CLASS = 1 through 4).
  • EOTMAJROADS_RTE_MAJOR is a multi-part line feature class consisting of all Interstate and U.S. routes and several major State routes.

Note: The 'EOT' in the layer names was not changed to 'DOT' because legacy applications and web services rely on the existing names.

Production

MassGIS received the 2017 year-end release of MassDOT's RoadInventory data and, in addition to the edits described above, further processed the data to facilitate display, particularly in OLIVER (which includes the statewide Base Map) and ArcMap. Processing included:

  • adding the CLASS, ADMIN_TYPE and RDTYPE fields, used forline and route marker (shields) symbolization
  • adding the ALTRTNUM<1-4> and ALTRT1TYPE fields forenhanced route marker labeling
  • adding the RT_NUMBER and STREET_NAME fields so that existing applications that use these fields would continue to function
  • other fields described below

To produce the Major Roads layer (EOTMAJROADS_ARC), MassGIS selected arcs where CLASS = 1, 2, 3 and 4 from the full layer, dropped all fields included in the original layer from MassDOT, and dissolved on all the fields added by MassGIS to reduce the number of arc segments.

The Major Routes layer (EOTMAJROADS_RTE_MAJOR) was produced by MassGIS from the Major Roads layer by selecting all features where ADMIN_TYPE = 1 (Interstate) or 2 (U.S.), or where the RT_NUMBER or any of the alternate route numbers for state routes (ADMIN_TYPE = 3) is 2, 3, 8, 9, 18, 24, 25, 28 or 128. In ArcGIS 10.x, these roads were dissolved as multi-part features on the ADMIN_TYPE and RT_NUMBER fields. This layer was produced for fast display at small (e.g. statewide) scales rather than for true route-based analysis.

Attributes

Fields from MassGIS

Each arc in the 'All Roads' EOTROADS_ARC feature class contains the following fields added by MassGIS:
Field NameTypeDescription
CLASS1-I

Designates a road based on functional classification and access; used for plotting. Classes are:
1 - Limited Access Highway
2 - Multi-lane Highway, not limited access
3 - Other numbered route
4 - Major road - arterials and collectors
5 - Minor street or road (with Road Inventory information, not class 1-4)
6 - Minor street or road (with minimal Road Inventory information and no street name)
In some cases, based on a visual review, values in this field were modified for consistency when symbolizing the data.
Note: Tracks and Trails (formerly CLASS codes 7 and 8) have been removed from this layer and are now part of the statewide Tracks and Trails datalayer.

The CLASS field was first calculated to 0 for all records and then coded in Oracle SQL*Plus based on the following WHERE clauses:

1: ADMIN_TYPE = 1 or (FUNCTIONALCLASSIFICATION= 1 and ACCESSCONTROL = 1) or(FUNCTIONALCLASSIFICATION = 2 and ACCESSCONTROL = 1)
2: CLASS = 0 and ACCESSCONTROL <> 1 andNUMBEROFTRAVELLANES > 1 andOPPOSITENUMBEROFTRAVELLANES > 0 and (RT_NUMBER<> ' ' or RT_NUMBER IS NOT NULL)
3: CLASS = 0 and (RT_NUMBER <> ' ' orRT_NUMBER NOT LIKE 'N%' or RT_NUMBER IS NOT NULL)
4: CLASS = 0 and ((FUNCTIONALCLASSIFICATION IN(2,3,5)) or (FUNCTIONALCLASSIFICATION = 1 andACCESSCONTROL = 1 and ADMIN_TYPE <> 1 ))
5: (CLASS = 0 and FUNCTIONALCLASSIFICATION IN(0,6)) or (CLASS = 0 and STREET_NAME <> ' ' andSTREET_NAME NOT LIKE 'RAMP-RT%' and STREET_NAME IS NOTNULL)
6: CLASS = 0
ADMIN_TYPE1-IType of route in the RT_NUMBER field. Based on the ROUTESYSTEM field. Types are:
1 - Interstate
2 - U.S. Highway
3 - State Route
0 - Not a numbered route
STREET_NAME80-CStreet name. Same as the STREETNAME field, included for legacy application purposes. In the shapefile download this field is STREET_NAM.
RT_NUMBER4-CPrimary route number. This is the route number of the road type listed in ADMIN_TYPE (where ADMIN_TYPE is 1-3). Based on the ROUTENUMBER field but not including values that begin with 'N', which are codes used internally by MassDOT and not signed route numbers.
ALTRTNUM1
ALTRTNUM2
ALTRTNUM3
ALTRTNUM4		4-CAlternate Route numbers. Type is either U.S. or State route for ALTRTNUM1, as indicated in the ALTRT1TYPE field. All other alternate routes are State routes. No road in the state has more than four alternate routes. These fields were populated using the RoadSegementToRouteList table that was included in an earlier data delivery from MassDOT.
ALTRT1TYPE1-IAdministrative Type for the route number in the ALTRTNUM1 field (2 = U.S. Highway, 3 = State Route)
RDTYPE1-IExpanded version of the CLASS field, with additional values for ramps and tunnels. Values 1 through 6 are the same as CLASS (above). Other values include:
7 - Ramp [Based on SQL query where (FACILITYTYPE in (7, 8, 9, 10) and STREET_NAME like 'RAMP%' and RT_NUMBER IS NULL and CLASS > 2) or (FACILITYTYPE = 1 and STREET_NAME like 'RAMP%' and RT_NUMBER IS NULL and CLASS > 2)]. Some segments were coded as a ramp based on visual review of the data. In places where CLASS 1 highways intersected with other CLASS 1 highways, connecting ramps were coded RDTYPE = 1.
8 - Tunnel [Based on SQL query where FACILITYTYPE in (3, 11) and CLASS > 3]
9 - Tunnel - Limited Access Highway [Based on SQL query where FACILITYTYPE in (3, 11) and CLASS = 1]
10 - Tunnel - Multi-lane Highway, not limited access [Based on SQL query where FACILITYTYPE in (3, 11) and CLASS = 2]
11 - Tunnel - Other Numbered Route [Based on SQL query where FACILITYTYPE in (3, 11) and CLASS = 3]
MGIS_TOWN1-IOfficial city or town name
LENGTH_MIDoubleLength of line in miles. From the Calculate Geometry tool in ArcGIS Desktop 10.4.1.
LENGTH_FTDoubleLength of line in feet. From the Calculate Geometry tool in ArcGIS Desktop 10.4.1.

The Major Roads layer EOTMAJROADS_ARCcontains only the above fields added by MassGIS except MGIS_TOWN, LENGTH_MI and LENGTH_FT. The CLASS field contains values 1, 2, 3 and 4.

The Major Routes layer EOTMAJROADS_RTE_MAJORcontains only the ADMIN_TYPE and RT_NUMBER fields.

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Fields from MassDOT

The other fields in the arc attribute table were included in the data from MassDOT. These include roadway classification, ownership, physical conditions, traffic volumes, pavement conditions, highway performance monitoring information, and more. For details see the Road Inventory Data Dictionary (PDF format, 105 kb). Note that in the shapefile download, that format only allows for ten characters in field names; the longer Road Inventory File field names are truncated when converted from an ArcSDE layer to a shapefile.

Maintenance

MassDOT GIS staff regularly update this layer. MassGIS receives a version from MassDOT and after completing the processing described above makes updated data available once a year.

Also see the Limited Access Highway Exits layer.

Since the MassDOT roads do not contain address ranges, they may not be used for address matching (geocoding) in GIS software. The most recent roads data publicly available from MassGIS that may be used for geocoding applications are the TIGER roads from the 2010 U.S. Census. For more accurate and complete address matching use the Statewide Address Points for Geocoding.

Last Updated 11/29/2018

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2019-04-03
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