Blacks are indeed pulled over more than whites. Here is some data for 2008 traffic stops.
• 8.4% of all drivers were pulled over in a traffic stop that year.
• 9.9% of male drivers were stopped, 7.0% of female drivers.
• 8.4% of white drivers were stopped, 8.8% of black drivers were stopped, and 9.1% of hispanic drivers were stopped.
• Speeding was the most common reason for being stopped.
• 85% of drivers felt the stop was legitimate. This breaks down as 86% of white drivers thought the stop was legitimate, 74% for black drivers, and 82% for hispanic drivers.
• 5% of stops led to a search of the driver, the vehicle, or both. Male drivers were more likely to be searched than female drivers (7.4% vs. 1.6%). By race, it was 3.9% for whites, 12.3% for blacks, and 5.8% for hispanics.
• Black or African American alone, percent definition and source info Black or African American alone, percent, 2013 (a) 13.2%
• American Indian and Alaska Native alone, percent definition and source info American Indian and Alaska Native alone, percent, 2013 (a) 1.2%
• Asian alone, percent definition and source info Asian alone, percent, 2013 (a) 5.3%
• Native Hawaiian and Other Pacific Islander alone, percent definition and source info Native Hawaiian and Other Pacific Islander alone, percent, 2013 (a) 0.2%
• Two or More Races, percent definition and source info Two or More Races, percent, 2013 2.4%
• Hispanic or Latino, percent definition and source info Hispanic or Latino, percent, 2013 (b) 17.1%
• White alone, not Hispanic or Latino, percent definition and source info White alone, not Hispanic or Latino, percent, 2013 62.6%
• 8.4% of all drivers were pulled over in a traffic stop that year.
• 9.9% of male drivers were stopped, 7.0% of female drivers.
• 8.4% of white drivers were stopped, 8.8% of black drivers were stopped, and 9.1% of hispanic drivers were stopped.
• Speeding was the most common reason for being stopped.
• 85% of drivers felt the stop was legitimate. This breaks down as 86% of white drivers thought the stop was legitimate, 74% for black drivers, and 82% for hispanic drivers.
• 5% of stops led to a search of the driver, the vehicle, or both. Male drivers were more likely to be searched than female drivers (7.4% vs. 1.6%). By race, it was 3.9% for whites, 12.3% for blacks, and 5.8% for hispanics.
http://www.bjs.gov/index.cfm?ty=tp&tid=702
By 2011, the percent of drivers of each race that were stopped had gone up, to 10% of whites, 13% of blacks, and 10% of hispanics.
http://www.bjs.gov/content/pub/press/pbtss11rpa11pr.cfm