<snip>
When you get told to pit (either for a jump-start or for cutting the course)
you enter the pitlane and make sure to drive in *slowly* and stop as soon as
the board with your name on changes to a "wait" sign. Once the wait sign
disappears you are free to go. The amount of time waited depends on how
much advantage you gained by jumping the start or on which corner you cut.
There is no other reason to pit. (The only other scenario is when you drive
the wrong way round the track for any distance, then when you pit you'll
get a "DQ" board which means Disqualified)
HTH
Ian