Their goal on Sunday was to block Metro Transit's Green Line to bring attention to the case of Marcus Abrams, a 17-year-old boy with Asperger's syndrome who was injured by transit police last month in St. Paul.
"We're here to shut them down!" about 100 Black Lives Matter protesters chanted in unison.
The Green Line trains didn't run for a few hours between the Dale Street and Hamline Avenue stations, a section that included the Lexington Parkway station where Abrams was arrested and where Sunday's protest started. Thousands of Vikings fans use the Green Line to get to games at TCF Bank Stadium, including Sunday's home opener at noon.
Since Metro Transit knew about the protest in advance, it diverted light-rail passengers onto buses running on Thomas Avenue, a few blocks north of the usual Green Line route along University Avenue.
"From our viewpoint, everything went well," said Metro Transit spokesman Howie Padilla. "We appreciated that their voices needed to be heard, and that certainly was done."
A heavy police presence watched the protesters from a distance. Squads blocked University Avenue and a few cross streets and redirected traffic at Hamline.
A few light-rail riders in Vikings purple who didn't know about the diversion waited at the Hamline station.
"They have no right to disrupt traffic," one man said. "They can protest on the sidewalk."