There are normally 2 fully redundant systems in place at all USCF events.
Results are usually ready before the winner even slows down.
The heart of the system, these devices drive everything from photofinish cameras to scoreboards. Normally used for Pursuit racing, the countdown system is also fully enabled for false start detection via integrated tapeswitches. These devices physically prevent the bike from starting until a caliper holding the rear wheel releases. In Pursuits, the riders start on opposite sides of the track from each other, while their blocks are managed by a central control unit manned by an official. Either way, our timing system drives realtime data to the world via these display systems.