You are not permitted to drive while impaired in the state of Colorado. The technology for measuring THC in the blood stream is not as sophisticated as the technology used for alcohol impairment. The law says that operators with five nano grams, or more, of active tetrahydrocannabinol (THC) in their blood can be prosecuted for driving under the influence (DUI). However the primary enforcement mechanism is police judgment of field sobriety tests. Colorado police have received special training to detect THC impairment and most drivers are changed based upon officer judgment of the field sobriety test.
Yes, you can get a DUI in Colorado for driving impaired after smoking marijuana. Colorado law specifies drivers with five nanograms of active tetrahydrocannabinol (THC) present in their whole blood may be prosecuted for driving under the influence (DUI). Law enforcement officers will determine if you are high. They will base their arrest on impairment they observe even without knowing the level of THC.
Yes, you can get a DUI if you are caught driving under the influence of marijuana in Colorado, just like any other controlled substance. If the officer believes you are under the influence of marijuana they will administer a field sobriety test which will check and monitor your behaviors. If you fail this test you will be arrested and charged with a DUI or some equivalent. Marijuana is treated roughly the same as alcohol.