Solo (AKA Autocross) is a test of driving skill and the car's agility in which one car at a time is driven over a clearly defined course, the elapsed time and penalties for course deviations being the determining factor for awards.  Most Solo events take place in large parking lots, with the course defined by orange pylons. Speeds are limited to 60 mph and the hazards to spectators and participants do not exceed those encountered in normal, legal highway driving.