It would be a wise decision to avoid driving in downtown Madison on Tuesday.

Thousands of people were assembling Tuesday morning to march on the State Capitol in protest against Gov. Scott Walker's budget plan.

As of 10:30 a.m., law enforcement officers were shutting down several streets because of the crowds.

Madison Police Department spokesman Joel DeSpain told madison.com that traffic is being diverted from parts of the Capitol Square as people are gathering near the Masonic Temple on Wisconsin Avenue in preparation for the march.

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"Driving downtown may be problematic, and people should expect delays," DeSpain said. "Police will make it as safe as possible for marchers as they move down the streets to the Capitol."

Buses were detouring one block from the Capitol Square and from Eeast Johnson Street. Further street closures and detours may occur through the day as crowds warrant, police said.

The protest at the Capitol is scheduled for noon Tuesday, according to organizers.