I was watching a live feed from a Corvette roughly around mid race (sun rise) and there was a pace car situation for what looked like track repair. After a number of laps the pace car withdrew but waving yellows remained at the work area on the track. The Corvette would slow to a crawl (1st gear) when it was is the work zone. Flaggers were on the track surface! How was this administered.... How did the drivers know how slow to go when proceeding through the work area?
Brian