| http://www.w3.org/ns/prov#value | - Those tools include strict laws against driving under the influence, strong law enforcement efforts, and a public education campaign, he said.Unfortunately, a tool such as a Breathalyzer has not yet been developed to help police officers determine on the fly whether a person is driving stoned, Whitehill and Asbridge said.Police now have to rely on blood or urine tests to determine whether a driver
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