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Most Dangerous Intersections in Somerville, MA

Quick answer: from 21 Oct 2025 – 17 Sep 2026, the location with the most reported crashes in Somerville, MA was College Av & Highland Ave with 9, followed by Broadway & Powder House Blvd (6). These are crash counts from City of Somerville Open Data — Police Data: Crashes (Somerville Police Department, ODbL), not risk rates: busier junctions see more crashes partly because more cars use them.

21 Oct 2025 – 17 Sep 2026

Top 20 crash locations in Somerville, MA

#LocationReported crashesInjuredKilledMap
1 College Av & Highland Ave 9 20 open
2 Broadway & Powder House Blvd 6 20 open
3 Near 14 Mcgrath Hwy (road segment) 6 10 open
4 Highland Av & Porter St 6 10 open
5 Near 230 Holland St (road segment) 6 20 open
6 Near 105 Middlesex Av (road segment) 5 10 open
7 Broadway & Warner St 5 20 open
8 Grandview Av & Walnut St 5 10 open
9 Near 487 Broadway (road segment) 5 10 open
10 Medford St & School St 4 20 open
11 Lincoln St & Perkins St 4 00 open
12 Cedar St & Lexington Ave 4 30 open
13 Broadway & Temple St 3 10 open
14 Florence St & Washington St 3 30 open
15 Myrtle St & Washington St 3 10 open
16 Broadway & Walnut St 3 00 open
17 Benton Rd & Highland Av 3 10 open
18 Beacon St & Forest St 3 10 open
19 Highland Av & Lowell St 3 30 open
20 Foley St & Grand Union Blvd 3 00 open

384 crashes with a location were counted across 223 days. Each spot is about 135 m across; the name is the one the police most often recorded there. Source: City of Somerville Open Data — Police Data: Crashes (Somerville Police Department, ODbL).

Questions

Dangerous intersections — FAQ

What is the most dangerous intersection in Somerville, MA?
In the official records we hold (21 Oct 2025 – 17 Sep 2026), the location with the most reported crashes was College Av & Highland Ave, with 9. That is the highest count, not proof it is the riskiest: busy junctions carry more traffic, and the data has no traffic volumes to compare crashes per vehicle.
How is this list made?
Every crash in the City of Somerville Open Data — Police Data: Crashes (Somerville Police Department, ODbL) has a reported point. We count crashes in a grid of about 45 m squares, then merge each busy square with its neighbours (about 135 m across) so one junction recorded at slightly different points stays one spot. Points that collect many unrelated street names are default locations, not junctions, and are left out.
Why does a junction near me not appear?
Only 20 spots are listed, and only crashes that the police reported and the city published with a location are counted. Recent weeks can still be missing while reports are processed.
How current is it?
The tally covers 223 days, 21 Oct 2025 – 17 Sep 2026, and grows each day up to a full year. The source itself is refreshed once a day on this site.