Loop Data

NASCAR Loop Data is the official advanced-stats set — it describes how a car ran, not just where it finished, so it survives wrecks and DNFs and is the cleanest pace signal there is. Now across all three national series. Source: NASCAR Loop Data (cf.nascar.com). Entertainment & information only, 21+.

Driver Rating (2–150) is NASCAR's composite pace score — higher is better; a dominant winner runs 130+. ARP = Average Running Position, the average track position a car held all race (lower = ran further up front; DNF-robust). Closers = position gained over the closing laps (NASCAR's closing_laps_diff; positive = the car charged late). Early / Mid / Late = average running position over the opening / middle / closing third of the run — the green-flag speed-by-segment profile (lower = faster). % Top-15 = share of laps run inside the top 15. Pass Diff = green-flag passes made minus times passed. Quality Pass = passes of cars running in the top 15. Fast Laps = laps among the fastest 10% of the field. Trends show each driver's race-by-race Driver Rating & ARP across the season — the cleanest read on form.