Nashville Superspeedway

2024 Nashville Race Report

The 2024 Nashville race saw notable activity with 20 lead changes, a record 15 cautions, and numerous overtime attempts. These cautions accounted for 23.9% of the race, and 73.4% were due to accidents and spins. There were nine different leaders, and green-flag and yellow-flag pit cycles significantly impacted lead changes. […]

Nashville Superspeedway

2024 Nashville Practice Report

The 2024 Nashville Practice Report features a fast Ty Gibbs, only two Chevys in the top-10 single-lap practice times, and a good showing from Ford. But don’t rely on a simple inspection of the practice list for your picks! […]

Martin Truex Jr.
Chase Elliott

2024 Darlington I Race Report

The 2024 Darlington race report is a great example of how numbers never tell the entire story of a race. We’ve got side-by-side racing but not a lot of official lead changes, and bold moves, some of which worked and some of which didn’t. […]

Timing and Scoring

Photo-Finish Technology

Photo-finish technology has spawned a handful of articles on how NASCAR determined the winner in a 0.001 second margin of victory at Kansas. I thought I understood the technology, but it turns out I hadn’t quite entirely gotten it. […]


2024 Kansas I Race Report

Hello and welcome to the 2024 Kansas I Race Report. Things have been going slowly here at BuildingSpeed because of a total re-org of the data system. That meant I had to re-write a ton of programs. Expect this report to grow as more of the plots get re-written. […]

Lead Changes

Counting Lead Changes Through the First ‘x’ Races is Meaningless

The hoo-rah being made over the large number of lead changes in the NASCAR Cup Series through the first 11 races of the 2024 season is artificial. It’s an accident of schedule changes and tire weirdness at Bristol. Counting lead change numbers by themselves doesn’t mean anything unless you consider where the numbers come from. […]