The purpose of Solo 1 is to allow drivers to experience higher speeds without the added dangers of wheel-to-wheel competition. It is a non wheel-to-wheel competition in which drivers negotiate a kart track or road race course, one at a time, in a competition against the clock. Multiple cars are allowed on the track at the same time, however, passing is not allowed. Each "run" of the course is timed and the lowest run time wins.
Solo 1 vehicle requirements are more stringent than those of Solo 2. Modified classes and convertible vehicles require rollover protection and Street Prepared and above classes usually require a four-point restraint harness.
Average entry fees for this type of event are about $50 and up. In most cases, a license from the governing body of the region is required to compete in Solo 1.