Officials report no major traffic problems for this weekend's Sprint Cup Series races at the Kentucky Speedway in Sparta.It was a big turnaround from last year's inaugural event in Gallatin County.The state and and the speedway spent $11 million on road and parking improvements following last year's gridlock that left thousands of NASCAR fans stranded in traffic on Interstate 71.There were also apparently no major heat-related medical problems for the 100,000 fans who attended Saturday's Quaker State 400 race. The track set up cooling stations around the facility and medical teams from the University of Kentucky were on hand to treat any heat-related illnesses. Brad Keselowski won the Quaker State 400, the weekend's main event. Kasey Kahne was second, followed by Dale Earnhardt, Jr. and Jeff Gordon.