Well, in the first case, where HLT was shutting off 1/3 of the way through the lap, it was definitely facing the right way. Those two parts of the course were parallel to each other, and the car was going the same way on both segments, but the two segments were offset by 140 feet.

OK, I solved that problem by purging all old date before the next event. Thank you very much for your help. There are two other problems. The most serious is that the lap timer doesn't know where the end of the course is. Take yesterday as an example. I set the start and finish coordinates as direct...

I have Lap Timer on an iPhone. I use it for autocross only, no track racing. LT works OK when it works, but my complaint is that it still pretends to be working when in fact it isn't doing anything. Take yesterday for example. I was at an event at a location where I have competed before, and gotten ...