Not having ridden a brevet yet, I'm curious how the closing times of the controls are determined. Is it a standard amount of time for each brevet? I thought I read somewhere that they close them based on a certain amount of time after the official start time. And that that time is based on a certain minimum KMH. If that's so, it would seem pretty easy to calculate control closing times based on the distance to each control from the start?
Or maybe it just printed on your brevet card?