Section 309.211 - Obstacles(a) An obstacle along the inside rail of a racetrack, including starting point markers and distance poles, must be placed at least 10 feet away from the bottom of the rail posts.(b) If a concrete drainage ditch is built behind the inside rail, the concrete must be covered with a soft material.16 Tex. Admin. Code § 309.211
The provisions of this §309.211 adopted to be effective October 21, 1999, 24 TexReg 8969