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 South Carolina, the laws that apply to driving under the influence (DUI) of alcohol or drugs are primarily focused on motor vehicles and do not explicitly include bicycles. South Carolina Code of Laws Section 56-5-2930 defines DUI as operating a motor vehicle while under the influence of alcohol, drugs, or a combination of both, to the extent that the person's faculties to drive are materially and appreciably impaired. Since bicycles are not considered motor vehicles, the specific DUI statutes do not typically apply to cyclists. However, it is important to note that while there may not be a specific cycling under the influence (CUI) law in South Carolina, cyclists could potentially be charged under public intoxication or disorderly conduct statutes if their behavior while cycling under the influence poses a danger to themselves or others or disrupts public order.