A police spokesman said the cows, which escaped from a local farm, wandered onto Interstate 195 in Dartmouth around 7:20 a.m. Monday, The Herald News, Fall River, Mass., reported Tuesday.
Sgt. Francis Poitrast said troopers used their cruisers to create a "rolling roadblock" that kept traffic moving slowly.
"They used their cruisers to get the cows into the breakdown lane," Poitrast said.
"It took about an hour to find the owner," Poitrast said. "Troopers just kept their cruisers near the cows and kept them from getting back out in traffic."
Poitrast said no one was hurt during the incident.
"That's the best thing," Poitrast said. "No one was hurt and the cows didn't get injured."