RallyCross, also known as RallyX, is a type of car competition in the U.S.A. and is sanctioned by the SCCA. It is a timed event that involves solo driving on grass or dirt and can be considered an "autocross on dirt". As with autocross, the emphasis is on driver skill and handling rather than absolute speed, with frequent corners generally keeping speeds below 60 mph. Unlike autocross, and more reminiscent of performance rally, every course lap is added as your cumulative time. Penalties for displacing cones are the familiar 2 seconds per cone, but gate penalties are 10 seconds instead of a DNF.
For more information regarding rules and the running of these events please read the SCCA RallyCross Rulebook (Here) as well as reading the Supplemental Rules for the Tucson RallyCross.