Phoenix International Raceway
A pie chart showing that 50% of the drivers who get into the playoffs having only won road courses and/or superspeedway races don't make it out of the top 16.
Road Courses
Homestead-Miami
A scatter plot showing the number of cautions in 2018 as a function of number of races
Statistics
Homestead-Miami
This is a MTS CT Plus Flat Trac, which Goodyear (and other companies) use for tire testing (Photo courtesy of Smithers.)
Goodyear
Chase Elliott
Daytona Road Course