"In 2011, 6% of drivers pulled over in traffic stops experienced some type of force used against them, from shouting and cursing, to verbal threats of force or other action, to physical force, including hitting, handcuffing, and pointing a gun (table 9). Of the 1% of stopped drivers who experienced physical force during the traffic stop, more than half (55%) believed the police behaved properly during the contact. A similar percentage of drivers who experienced verbal threats of force believed the police behaved properly (56%).
"Three in 4 (75%) stopped drivers who experienced any type of force believed the police actions were unnecessary. About two-thirds (65%) of drivers who experienced police use of force did not think the force was excessive. Among stopped drivers who experienced any type of verbal or physical force, 83% who believed the force used or threatened against them was necessary also thought police behaved properly, compared to 38% of those who did not believe the use of force was necessary."

Source

Lynn Langton, PhD, and Matthew Durose, "Police Behavior During Traffic and Street Stops, 2011" (Washington, DC: Bureau of Justice Statistics, Sept. 2013), NCJ242937, p. 10.
http://www.bjs.gov/index.cfm?…
http://www.bjs.gov/content/pu…