Can some with a 2-seat car use the 3-person HOV lane legally?
A. No, it is not legal for a two-seater vehicle to use the 3+ HOV lane on westbound SR 520. Federal law allows motorcycles to use all HOV lanes because it is safer to keep two-wheeled vehicles moving than to have them in start-and-stop traffic conditions. This has nothing to do with how many people the motorcycle is designed to carry.