WASHINGTON — A Justice Department report says blacks in Ferguson, Missouri, are disproportionately subject to excessive police force, baseless traffic stops and citations for infractions as petty as walking down the middle of street.

City officials said Tuesday they were reviewing the report, which they expect to be released today.

With scathing findings of a months-long investigation being released, attention now turns to Ferguson as the city confronts how to fix racial biases that the federal government says are rooted in the police department, court and jail.

The full report could serve as a road map for significant changes by the department, which commanded national attention after one of its officers shot and killed an unarmed black man, 18-year-old Michael Brown, last summer.

Similar federal investigations of troubled police departments have led to the appointment of independent monitors and mandated overhauls in the most fundamental of police practices. The Justice Department maintains the right to sue a police department if officials balk at making changes, though many investigations resolve the issue with both sides negotiating a blueprint for change known as a consent decree.

“It’s quite evident that change is coming down the pike. This is encouraging,” said John Gaskin III, a St. Louis community activist. “It’s so unfortunate that Michael Brown had to be killed. But in spite of that, I feel justice is coming.”

Brown’s killing set off weeks of protests and initiated a national dialogue about police use of force and their relations with minority communities. A separate report being issued soon is expected to clear the officer, Darren Wilson, of federal civil rights charges. A state grand jury already declined to indict Wilson, who has since resigned.

The findings of the investigation, which began weeks after Brown’s killing last August, are being released as Attorney General Eric Holder prepares to leave his job following a six-year tenure that focused largely on civil rights. The report is based on interviews with police leaders and residents, a review of more than 35,000 pages of police records and analysis of data on stops, searches and arrests.

A summary provided Tuesday reveals patterns of bias across the criminal justice system, from encounters with patrol officers to treatment in the municipal court and jail.

It says black drivers are far more likely to be searched than white motorists even though they’re less likely to be found with contraband. Nearly all people kept at the city jail for more than two days are black, and of the cases in which the police department recorded instances of use of force, the overwhelming majority involved blacks.