The chariot racers had to cover seven laps.
there are 9 laps
9
9
9
Wooden eggs marked which lap they were on.
A chariot race in ancient Rome normally lasted for seven laps.
Tethrippon was a four-horsed chariot race, that involved twelve laps around the track at the Hippodrome stadium.
yoga type
it took them 500 laps to get around the posts that was equal to 5 1/2 miles
you have to wait for the ref to drop a white cloth to start, many people died form such races. Laps were normally between 7-10, and take around 15 minutes to complete the race. Most chariot races had knives to free themselves if a chariot was to crash and they were to get tangled up.
If you are talking about Caution laps during a race, then its to keep their tires at a hot temp to grip the track better during restart.