The cables for the lap counters are attached to the Overpass, above The Track. The support plates for the Lane Divider are placed on top of the carpet, and covered with a second piece of carpet that is taped in place. Under the main carpet of The Track you would find (depending upon the venue):
Wood planking or concrete floor or iso-grid plastic matting , then
Plywood subfloor or ice (optional), then
Floor joists or reinforced concrete, then
A crawlspace (optional), then
Packed soil, then
Clay, then
Bedrock, then
Continental crust, then
The Moho Discontinuity, then
Upper Mantle (primarily composed of molten peridotite, eclogite, olivine, spinel, garnet, pyroxene, perovskite, and other oxides), then
Lower Mantle (primarily composed of magnesium and silicon oxides), then
Core (primarily composed of iron and oxygen, sulfur, and nickel alloys)
Just be glad that they didn’t do out the other side. Has anyone asked the GDC what is above the floor? I am certain that depending on the venue and earth’s rotation, at one time or another, they would have to include “Dave’s” other car!