Kentucky Speedway and state officials unveiled their plans Tuesday to correct the traffic and parking problems experienced at last month’s NASCAR Sprint Cup Series race. Speedway Motorsports Inc., the company that owns the Gallatin County track, is investing an estimated $7.5 million. That amount includes the $1.5 million the speedway paid last week to acquire 142 acres of land across Ky. 35 from the track. The added land will allow the speedway to park about 10,000 more cars, general manager Mark Simendinger said. Meanwhile, the Kentucky Transportation Cabinet projects it will spend $3.6 million on road improvements to improve access to parking areas at the speedway.