Large races have several batches of runners crossing the finish line together. For instance, in a high school 5K race with over 150-200 runners, it’s common for them to finish in groups of eight or more, making it challenging for timers to record every time. In this case, the video system is necessary because operators can step through frames one-by-one to accurately record the finishing order. The equipment and skilled operators are expensive. It generally costs over a thousand dollars to hire them.
However, if hired, coaches leave all the set-up to the operators.
At the finish line, the camera to the side of the runners provides a view of the runners’ chests for the video operator to track finishing order. Another camera to the front captures the bib numbers so the operator can identify runners.
When bib numbers are unreadable at large meets, RFID chips are also needed because video operators can’t simply ask coaches to identify runners.
RFID chips, along with timing mats placed at the finish, are used as proximity sensors to identify runners.
Extra mats can be placed at mile markers to take splits, which are automatically recorded by RFID readers.
Runners tie the chips to their shoelaces, which is a cumbersome process. Chips add extra shoe-weight, need to be untied after the race, then returned.