Global Rallycross will make its debut at Charlotte Motor Speedway on Saturday following the HISTORY 300 NASCAR Nationwide Series race. For fans new to the sport, here's a quick introduction.

To view photos from Tuesday's practice session, click here.

ACTION SPORTS WITH A ROLL CAGE

The Global Rallycross Championship combines the best aspects of circuit racing, off-road racing and rally competition to deliver intense action in a fan-friendly environment. Action sport stars including Travis Pastrana and Brian Deegan have described the sport as "motocross with a roll cage."

This made-in-the USA take on the established European sport of rallycross pits production-based, small cars against each other for door-to-door racing featuring high-energy racing around tight hairpin turns, through narrow chicanes and across water features. Drivers progress through a series of heats race to advance into a final race, where winner takes all.

Rallycross heats are short, multi-lap races over a course that includes a diversion known as the "joker lap,” that typically adds time to the regular lap. All drivers must take the joker at least once during a heat race at the driver's option, and similar to a NASCAR pit stop, the question becomes when to do so to reap a competitive advantage.

THE CARS

Rallycross race cars are production-based, and derived from street legal cars anyone can buy for their daily commute. These modified, 600 horsepower, all-wheel-drive turbocharged monsters go 0-60 mph in less than two seconds. Drivers describe the experience of piloting these vehicles as trying to rein in an angry bull. They are loud, aggressive and exciting to watch.

TOP DRIVERS

-Ken Block (Long Beach, CA): -Internet sensation, Gymkhana pioneer, World Rally Championship competitor, six-time winner of the 100-Acre Wood Rally

-Travis Pastrana (Annapolis, MD) - Freestyle Motocross pioneer, 10-time X Games Gold Medalist, 4-time Rally America Champion

-Tanner Foust (Dana Point, CA) - 2011 Global Rallycross Champion, three-time X Games Rally gold medalist, two-time Formula Drift Champion

-Dave Mirra (Greenville, NC) - Professional BMX rider and the most medaled X Games athlete of all-time

-Rhys Millen (Huntington Beach, CA)- Formula Drift champion, Red Bull New Year No Limits truck flip attempt

-Marcus Grönholm (Inkoo, Finland) - Two-time World Rally Champion

-Liam Doran (London U.K.) - 2011 X Games Rally Racing Gold Medalist, 3rd place 2010 European Rallycross Championship

THE COURSE

Charlotte Motor Speedway and Global Rallycross officials have designed a custom three-quarter-mile course along the track's frontstretch and pit road. Drivers will steer through a series of tight e-brake turns, chicanes and water features at high speeds.

Races are run in heats, with top finishers moving on. Seeding will be determined during a Friday night qualifying session. Heat races are scheduled to begin at approximately 6:30 p.m. Saturday, with the main event schedule for approximately 8:20.

THE RACE

After seeding is determined on Friday night, drivers will race in four-car heats for five laps. Each driver will be allowed to take the joker lap -- a shortcut -- once during each heat race. The top two drivers will advance to the next round.

The final feature of the night will include the top eight drivers after eliminations. Drivers will compete in an eight-lap finale to determine the overall winner.

TICKETS

Tickets to Saturday's GRC season opener start at just $25, and include entry into the HISTORY 300 NASCAR Nationwide Series race earlier in the day. Kids 13 and under get in free. To purchase tickets, call the Charlotte Motor Speedway Ticket Office at 1-800-455-FANS (3267) or visit www.charlottemotorspeedway.com.