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 Virginia, traditional DUI (driving under the influence) laws apply to the operation of motor vehicles and do not explicitly include bicycles, as bicycles are not considered motor vehicles. However, Virginia law does prohibit riding a bicycle on a public road while under the influence of alcohol or drugs to the extent that it impairs the rider's ability to ride safely. This is covered under Virginia Code § 18.2-266, which is the same statute that governs DUI for motor vehicles, but its application to bicycles is less severe in terms of penalties. While a cyclist may be subject to arrest and penalties if found riding under the influence, these penalties may not be as severe as those for DUI involving a motor vehicle. It's important to note that local ordinances may also have regulations regarding cycling under the influence, so cyclists should be aware of the laws specific to the locality in which they are riding.