Top crash locations and maps

MassDOT obtains crash data from the RMV's collection of State and local police crash reports.

The RMV maintains crash data records to help us develop safety improvement projects. The 2017 Top Crash Locations Report contains the most up-to-date crash data available to the Department as of July 2019.

MassDOT interactive crash cluster map

We maintain an interactive map showing the Top Crash Locations. The interactive map contains a number of different map layers which can be viewed by clicking MAP TYPE/LEGEND to see the various options, including the top 200 Intersection Clusters and HSIP clusters.

Crash geocoding

We produce a high crash locations listing and interactive maps using Geographic Information System procedures.

You can find these geolocated crashes in the crash portal. The rate of successful geocoding for crashes between 2015 and 2017 is approximately 95%, but is not uniform for all police departments or crash locations.

For details on these issues, and the crash clustering and ranking process, refer to a Top Crash Locations Report.

Highway Safety Improvement Program (HSIP) eligibility

We can identify locations that are eligible for HSIP funding. An HSIP-eligible location is a crash cluster that ranks within the Top 5% of each Regional Planning Agency. We based this on factors like crash incidences and severity using the Equivalent Property Damage Only (EPDO) index. The interactive map contains the various HSIP map layers. Refer to the HSIP Page for more details.


We have compiled the Top 200 High Crash Intersection Locations Report under the authority of United States Code Title 23, Section 148, Highway Safety Improvement Program. The Federal Highway Administration sponsored this program. The compilation of such information is subject to the limitations of Section 148 (g) (4).

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