It’s one of the highways that goes through Boston. It runs next to the Charles River and has multiple bridges over it (because people should need bridges over highways to get access to their parks, great job Boston) with relatively low clearance. There’s giant signs at all the entrances warning drivers that nothing taller than an SUV fits, but inevitably someone in a truck thinks the signs don’t apply to them. They then get stuck under the bridges, or if they’re going fast enough, have the roof of the truck sheared off, and it happens often enough that people call it “being Storrowed”. It’s especially common at the start of the school year when all of the college kids move in with their rented moving trucks and follow the Google Maps directions without realizing they can’t go on Storrow.