In any roadway accident, size matters. In Georgia, the legal definition of a moped is a vehicle that can’t go faster than 30 MPH, has an engine no larger than 50 cubic centimeters, and doesn’t require clutching or shifting. This makes mopeds among the smallest, lightest and slowest vehicles on the road. Mopeds are also much quieter than larger motorcycles. Because of these features, mopeds are harder to see than other vehicles.