City of Boston street segments data from the Street Address Management (SAM) system. Updated nightly.

Description of data fields in the Boston street segment data

Boston Main Street districts are a network of 20 Main Street Organizations that use a comprehensive revitalization approach to create, build, and sustain healthy commercial districts.

This dataset is from the City of Boston's Street Address Management (SAM) system, containing Boston addresses. Updated nightly and shared publicly.

City of Boston parking meters. Updated and maintained by Boston Transportation Department (BTD) Parking Clerk.

The Street Lighting Division of Public Works maintains 40,000 out of the City's 67,000 electronic streetlights, and oversees the contracting for the rest. It also takes care of 2,800 gas lights and 1,500 fire-alarm lights. This is a legacy dataset containing lattitude and longitude data for over 74,000 City streetlights.

MassGIS is working very closely with the State 911 Department in the state’s Executive Office of Public Safety and Security on the Next Generation 911 Emergency Call System. MassGIS developed and is maintaining the map and address information that are at the heart of this new system. Statewide deployment of this new 9-1-1 call routing system was completed in 2018.Address sources include the Voter Registration List from the Secretary of the Commonwealth, site addresses from municipal departments (primarily assessors), and customer address lists from utilities. Addresses from utilities were “anonymized” to protect customer privacy. The MAD was also validated for completeness using the Emergency Service List (a list of telephone land line addresses) from Verizon.The MAD contains both tabular and spatial data, with addresses being mapped as point features. At present, the MAD contains 3.2 million address records and 2.2 million address points. As the database is very dynamic with changes being made daily, the data available for download will be refreshed weekly.A Statewide Addressing Standard for Municipalities is another useful asset that has been created as part of this ongoing project. It is a best practices guide for the creation and storage of addresses for Massachusetts Municipalities.Points features with each point having an address to the building/floor/unit level, when that information is available. Where more than one address is located at a single location multiple points are included (i.e. "stacked points"). The points for the most part represent building centroids. Other points are located as assessor parcel centroids.Points will display at scales 1:75,000 and closer.MassGIS' service does not contain points for Boston; they may be accessed at https://data.boston.gov/dataset/live-street-address-management-sam-addresses/resource/873a7659-68b6-4ac0-98b7-6d8af762b6f1.More details about the MAD and Master Address Points.Map service also available.

Boston Parks and Recreation Department (BPRD) Trees. This includes both park and street trees. To filter for street trees only, remove any entries where park is not null (has a value). Updated daily.Fields:id: unique idspp_com: common species name*spp_bot: botanical species name*numberof_st: number of stemsdbh_range: diameter at breast height (DBH) binned into ranges. DBH is the tree's diameter measured at 4.5 feet off the ground. Possible values include 0 - 3 in, 3 - 6 in, 6 - 12 in, 12 - 18 in, 18 - 24 in, >30 in, or N/Adbh: diameter at breast height (DBH) rounded to the nearest 0.1 inch. DBH is the tree's diameter measured at 4.5 feet off the ground.date_plant: season that the tree was planted in, if available. Ex: Spring 2025neighborhood: open space planning neighborhood. See more info: (https://boston.maps.arcgis.com/home/item.html?id=93aac79866b940abb2161d67682804c0)park: if the tree is in a park, this is the official park name from the park directory (https://www.boston.gov/sites/default/files/file/2020/02/boston-parks-directory.pdf).os_id: unique ID for open space from the park directory (see above)address: street numberstreet: street namesuffix: denotes assumed address. If there is a value, address information may be incorrect. Users should default to coordinate information for accurate location information.site: ignorex_longitude: longitude (EPSG: 4326)y_latitude: latitude (EPSG: 4326)Please contact Chad Fisher, principal research analyst (GIS), with questions: chad.fisher@boston.gov.* Though not a species, species categories are also used to denote empty sites as well as planned plantings.

January 2025

This is a legacy dataset which contains detailed information on the timing and location of street sweeping service throughout the City. Daily street cleaning takes place April 1 to November 30 in most Boston neighborhoods (weather permitting), and over 400 curb miles of streets are maintained under the Daytime Street Sweeping Program.

A collection of historic traffic count data and guidelines for how to collect new data for Massachusetts Department of Transportation (MassDOT) projects.

Traffic-related data collected by the Boston Transportation Department, as well as other City departments and State agencies. Various types of counts: Turning Movement Counts, Automated Traffic Recordings, Pedestrian Counts, Delay Studies, and Gap Studies.

~_Turning Movement Counts (TMC)_ present the number of motor vehicles, pedestrians, and cyclists passing through the particular intersection. Specific movements and crossings are recorded for all street approaches involved with the intersection. This data is used in traffic signal retiming programs and for signal requests. Counts are typically conducted for 2-, 4-, 11-, and 12-Hr periods.

~_Automated Traffic Recordings (ATR)_ record the volume of motor vehicles traveling along a particular road, measures of travel speeds, and approximations of the class of the vehicles (motorcycle, 2-axle, large box truck, bus, etc). This type of count is conducted only along a street link/corridor, to gather data between two intersections or points of interest. This data is used in travel studies, as well as to review concerns about street use, speeding, and capacity. Counts are typically conducted for 12- & 24-Hr periods.

~_Pedestrian Counts (PED)_ record the volume of individual persons crossing a given street, whether at an existing intersection or a mid-block crossing. This data is used to review concerns about crossing safety, as well as for access analysis for points of interest. Counts are typically conducted for 2-, 4-, 11-, and 12-Hr periods.

~_Delay Studies (DEL)_ measure the delay experienced by motor vehicles due to the effects of congestion. Counts are typically conducted for a 1-Hr period at a given intersection or point of intersecting vehicular traffic.

~_Gap Studies (GAP)_ record the number of gaps which are typically present between groups of vehicles traveling through an intersection or past a point on a street. This data is used to assess opportunities for pedestrians to cross the street and for analyses on vehicular “platooning”. Counts are typically conducted for a specific 1-Hr period at a single point of crossing.

Boston Fire Department (BFD) district boundaries per general order of the fire department. New districts went into effect on 8/3/2011. This data was last updated on 9/22/2015 by BFD personnel. Boundaries are coincident with the Street Address Management (SAM) conflated street centerline data. Purpose was for use in new CAD system provided by Intergraph. Boundaries of districts created using newest version of city boundary provided by 2010 Census data.

September 2025

November 2023