alladega pas de deux
Why does a NASCAR pas de deux work only at Daytona and Talladega
Answer: because only Talladega and Daytona are smooth enough for two car Contact Push Drafting to work.
Talladega race is this weekend where you'll see more racing in the two cars in what we call Contact Push Drafting formation: two cars actually in contact; with the trailing car physically pushing the lead car.
Here's why. All other tracks are bumpy by comparison to Talladega and Daytona. When a car goes over a bump there's a lot going on in the suspension system.
Watch the suspension system of a car while going over a bump, we can simulate this effect by dropping the front end of a car onto a table, starting with the instant before the tires hit the ground.