flat surface in the arena?

[FRC2429]

Is the surface of the arena totally flat or is there a bump under the overpass. If so, how high would the bump be? Thanks

[GDC]

Please refer to Chapter 6 of The Manual and the official drawings of The Track. Most of The Track is flat. There are small (up to 1/2 inch) bumps near the Lane Divider, where the carpet-covered base plates for the Lane Divider are located