FERGUSON, MO (KTVI)-There’s a call from Ferguson protestors that could have an impact on-your- holiday weekend. During the massive, but peaceful “National March on Ferguson” Saturday, demonstrators revealed a new plan for civil disobedience: halt highway traffic across the St. Louis area on Labor Day.

More than a thousand people took to the streets Saturday for the march. They shut down West Florissant Avenue, marching to the spot where Michael Brown was shot and killed three weeks ago, then to a park in Ferguson. It was there, in the rain, that the plan was thrown out by organizers. They’re asking everyone involved to drive onto highways around St. Louis at 4:30pm on Monday, Labor Day and stop their cars for four and a half minutes. The time frame is intended to symbolize the four and a half hours Michael Brown’s body was in the street after he was shot.

Organizers say this will just be the beginning of such disturbances.

Zaki Baruti said, “If some of our demands are not dealt with, you’ll see more civil disobedience in the spirit of Dr. King, because we’re not just going to sit by and just let injustice be constantly impacting us.”

Most notable of their demands, the firing and arrest of Ferguson police officer Darren Wilson, who shot Michael Brown. That is currently in the hands of a grand jury.

It is unclear at this point how many people might participate in the seemingly dangerous practice of stopping cars on an interstate highway. No word at this point how police might respond.