Marchers move south on S. Florissant Road in downtown Ferguson, Mo., on Monday, Aug. 11, 2014 as they demonstrate at police headquarters against the police shooting of Michael Brown.

Marchers move south on S. Florissant Road in downtown Ferguson, Mo., on Monday, Aug. 11, 2014 as they demonstrate at police headquarters against the police shooting of Michael Brown.

*Protesters in the St. Louis suburb where an unarmed black 18-year-old Michael Brown was fatally shot by a white police officer plan to block part of Interstate 70 Wednesday afternoon in an act of civil disobedience.

Organizers said they want to bring rush hour traffic on I-70 in Ferguson to a standstill and expect to be arrested at the demonstration.

The Missouri State Highway Patrol and city and county police departments said they will “enforce the law and ensure public safety” at the planned shutdown.

A similar protest was planned on the day of Michael Brown’s funeral but was mostly curtailed at his family’s request.