In New York state, the blood alcohol limit is .08%. This means you cannot operate a motor vehicle with a blood alcohol level of .08% or higher as tested by either a Breathalyzer machine or a blood chemical test.
Additionally, New York also has what is referred to as “common law DWI.” This law prohibits a person from operating a motor vehicle in an intoxicated condition regardless of whether there is chemical evidence of the person’s blood alcohol level. The type of evidence used in these cases includes field sobriety tests, observations made by the police officer and the way the person is driving.
Finally, it is also against the law to operate a motor vehicle while under the influence of drugs. This includes any controlled substances, regardless of whether the person has a prescription for the substance.