Autocross (Solo) The autocross program is branded as "Solo". Up to four cars at a time run on a course laid out with traffic cones on a large paved surface, such as a parking lot or airport runway, without interfering with one another. Competitions are held at the regional, divisional, and national levels. A national champion in each class is determined at the national championship (usually referred to as "Nationals") held in September. In 2009, Solo Nationals moved to the Lincoln Airpark in Lincoln, Nebraska. Individual national-level events called "Championship Tours" and "Match Tours" are held throughout the racing season. The SCCA also holds national-level events in an alternate format called "ProSolo". In ProSolo, two cars compete at the same time on mirror-image courses with drag racing-style starts, complete with reaction and 60-foot times. Class winners and other qualifiers (based on time differential against the class winner) then compete in a handicapped elimination round called the "Challenge". Points are awarded in both class and Challenge competition, and an annual champion is crowned each September at the ProSolo Finale event in Lincoln, Nebraska. Rallying The SCCA sanctions "RallyCross" events, similar to autocross, but on a non-paved course. SCCA ProRally was a national performance rally series similar to the World Rally Championship. At the end of the 2004 season SCCA dropped ProRally and ClubRally. A new organization, Rally America, picked up both series starting in 2005. Road rallies are run on open, public roads. These are not races in the sense of speed, but of precision and navigation. The object is to drive on time, arriving at checkpoints with the proper amount of elapsed time from the previous checkpoint. Competitors do not know where the checkpoints are. Time Trials In recent years, the SCCA has expanded and re-organized some of the higher-speed events under the Time Trials banner. These include Performance Driving Experience ("PDX"), Club Trials, Track Trials, and Hill Climb events. PDX events are non-competition HPDE-type events and consist of driver-education and car control classroom learning combined with on-track instruction. Conferences, divisions and regions The SCCA is organized into six conferences, nine divisions and 115 regions, each organizing events in that area to make the events more accessible to people throughout the country. The number of divisions has increased since the SCCA's foundation. Northern Pacific and Southern Pacific started as a single Pacific Coast Division until dividing in 1966. Rocky Mountain