Am I a man or am I a muppet? If I'm a muppet then I'm a very manly muppet!
Can someone explain the "points left in reserve at the start without a pit stop"? Are these bonus movement points given to racers who opt to forgo the cards in the pits? If so, how are these movement points to be used?
It's telling you how many points you'll have "extra" to finish the race by taking the best possible route if you don't pit.
In other words, it's how much "play" you have in choosing outside routes.