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 California, there is a specific law that addresses cycling under the influence (CUI). Under California Vehicle Code 21200.5, it is illegal for a person to ride a bicycle on a highway while under the influence of alcohol, drugs, or both. This law is distinct from the state's DUI laws, which apply to motor vehicles. The penalties for CUI are less severe than those for motor vehicle DUI offenses. For instance, the fine for a CUI offense is typically around $250 and there is no jail time, whereas DUI penalties can include substantial fines, license suspension, and imprisonment. Additionally, a CUI conviction does not result in a point on the individual's driving record. However, it is important to note that while CUI is treated differently from DUI, it is still a punishable offense and can pose serious safety risks.