Some states have laws against riding a bicycle on a street or highway while under the influence of drugs or alcohol (cycling under the influence, or CUI). Other states apply traditional DUI/DWI laws to cycling while under the influence of drugs or alcohol. And some states don't have a specific CUI law, and don't apply traditional DUI/DWI laws to riding a non-motorized vehicle, such as a bicycle.
In Washington State, there is a specific law that addresses cycling under the influence (CUI). According to RCW 46.61.790, it is illegal to operate a bicycle on a public roadway while under the influence of alcohol or any drug. However, the penalties for cycling under the influence are not as severe as those for driving a motor vehicle under the influence. While a person cycling under the influence can be detained by law enforcement and transported to a safe location, they are not subject to the same fines and criminal charges as motor vehicle DUI offenses. It's important to note that while CUI is illegal, it does not carry the same level of legal consequences as a DUI or DWI in Washington State.