SRX format aims to reward driver skills, smarts on short tracks The good old steering wheel, gas pedal and brake pedal. "With this format, you not only have to be the fastest driver, but you've got to be the smartest driver too," said Tony Stewart, who co-founded SRX and will drive one of the cars this summer. Editor's Picks 1 Related SRX disclosed the format it will use Thursday to The Associated Press when the all-star series launches this summer at Stafford Motor Speedway in Connecticut on June 12 for the first of six Saturday night short-track races across the country. Each event will consist of two timed 15-minute heat races followed by a 100-lap feature at every track except Slinger Speedway in Wisconsin, where the event will be extended by 50 laps because the track is only a quarter-mile oval.