AdjPassEff – Adjusted Passing Efficiency shows how efficient of a passer a driver is adjusted for their starting position in a race. AdjPassEff represents how many percentage points above or below the average driver’s passing efficiency that driver is .
AEP/Average Extra Positions – the number of places a driver finishes above/below their expected finishing position, based on where they started the race.
AFP/ASP – Average Finishing Position/Average Starting Position.
AFS/Average Fast Speed – the average rank of a driver’s fastest lap in a race. Ex: AvgFastSpeed of 2 means that on average, that driver has the second fastest race lap time.
ATP/Average Track Position – the average running position of a driver on each lap they were racing, with their position taken once per lap at the start finish line. A full explanation of ATP can be found here.
ATP25 – a driver’s ATP for the last 25% of the race only.
DevATP/DevATP25 – Standard deviation of a driver’s ATP and ATP25.
DevFP/DevSP – Standard deviation of a driver’s finishing/starting position.
PassEff/Pass Efficiency – shows the percentage of passes that are in a driver’s favor. Passes are measured by a change in position at the end of each lap, once per lap. Pit lane passes are included but passes that result from an engine failure or something similar that causes a driver to retire are not counted against that driver.
RunPerc – the percentage of races a driver finishes running.
Top5Perc – the percentage of a driver’s running laps that he is in the top five of the running order.
PM (plus-minus) – the number of spots a driver has gained or lost on race starts for the season (total).
PMperRestart/Start – the number of spots a driver gains or loses on the race start on average.
StartRetention – the percentage of time a driver gains or holds their position on a race start. Race starts are measured for the first two laps.
xPoints/Expected Points – the number of points we would expect a driver to score in a race given how they ran as judged by ATP.