The Phoenix International Raceway - Tunnel Project consisted of the design and construction of a cut-and-cover tunnel approximately 270 lineal feet long and 36’ wide designed to accommodate both pedestrians and two lanes of traffic. The project required the design of structural concrete retaining walls and precast concrete beams to support the existing grandstand system upon completion of the excavation and tunnel construction. The tunnel roadway consisted of a 7” thick concrete slab-on-grade. Additionally, construction activities included site fencing, concrete barrier walls, paving, curb and gutter work, sump pump system, electrical lighting, and miscellaneous landscape activities.
Phoenix International Raceway is a 1-mile paved oval with 11-degree banking in turns 1-2, nine-degree in turns 3-4, three-degree on the front straight and nine-degree on the backstretch. The length of the front stretch is 1,179 feet and the length of the backstretch is 1,551 feet.