They'll post one sign—"Speed Limit 316," it says–on the side of Nevada Highway 160, between Las Vegas and Pahrump. They'll give another just like it to Oliver Webb, because when you break a speed record in 2020, you've earned a souvenir.
On October 10, on a closed seven-mile stretch of road, Webb piloted a $1.9 million Shelby Supercars (SSC) Tuatara to a world record for fastest production vehicle. Over two one-way runs, the Tuatara averaged 316.11 mph. The quickest run, at 331.15 mph, broke the previous one-way record of 284.6 mph, set by Koenigsegg on the same stretch of road in 2017, by 46.6 mph. Another notable speed record by a production car happened in September 2019, when a Bugatti Chironreached 304.773 mph on the Ehra-Lessien test track in Germany.
As for the "world record" designation: The speed run was measured and tested in accordance with Guinness specifications, but has not yet officially been certified by Guinness as a world record.