The traffic alerts are streaming in because the AFL-CIO is planning a major march this afternoon in support of Occupy Portland.

The march route loops around downtown during rush hour, starting at 5PM in Director Park.

Big labor groups on the East Coast have thrown their support behind the protest, even though union's strict organizational structure couldn't be more different from the loose, anarchic Occupy. Union support makes the protest mainstream—and can lead to major donations of time, money, and expertise.