associated with alcohol impaired driving. There is a debate regarding whether saturation patrols or checkpoints are more effective. The FBI did a study comparing saturation patrols vs. checkpoints in Ohio, Missouri, and Tennessee. The study showed that, “[o]verall, measured in arrests per hour, a dedicated saturation patrol is the most effective method of apprehending offenders.” Another survey found that "States with infrequent checkpoints claimed a lack of funding and police resources for not conducting more checkpoints." The survey found that some states "...preferred saturation patrols over checkpoints because they were more 'productive'", given that "... [a] large number of police officers [were used] at checkpoints." Controversy In May 2015, a Chicago Tribune study found that between 2010 and 2014, a majority of sobriety checks in Chicago were conducted in black and Latino neighborhoods, despite some white neighborhoods ranking among those with the highest number of alcohol-related traffic accidents. Fugitive roadblocks Police also use hastily set up roadblocks to check cars and car trunks when they are pursuing an armed and dangerous fugitive, such as an escaped maximum security prisoner or a suspected armed robber or murderer who is believed to be fleeing from police. Police at such a checkpoint may be armed with shotguns, submachine guns or semiautomatic carbines, in addition to their duty sidearms, depending on the laws and regulations in a jurisdiction. When setting up these types of roadblocks, police in some jurisdiction have the authorization to lay a spike strip across the road, to prevent suspects from trying to drive through the roadblock. See also Civilian checkpoint Saturation patrol Redacted, a war film which depicts US soldiers guarding a checkpoint in Iraq during the Iraq War References Further reading Mothers Against Drunk Driving. Sobriety Checkpoints: Facts and Myths. Mothers Against Drunk Driving website, September 11, 2005.. Ross, H. L. Confronting Drunk Driving. New Haven, CT: Yale University Press, 1992. Simpson, H. M., and Mayhew, D. R. The Hard Core Drinking Driver. Ottawa, Ontario, Canada: Traffic Safety Research Foundation, 1991. Taylor, L. Drunk Driving Defense. New York: Aspen Law and Business, 6th edition, 2006. External links Sobriety Checkpoints - It's a Sobering Thought! (California Highway Patrol) Best DWI & DUI Lawyer In Denver! (Mastro Barnes & Stazzone, PC) Military tactics Law enforcement techniques Checkpoints Driving under the influence