Exploring the brief but very memorable history of the Charlotte Motor Speedway Roval through the voices of those who helped create and raced on the dynamic road course.

--Joe Gibbs Racing winner Christopher Bell and Adam Stevens tour the layout and detail its appeal and challenges (3:30)

--Inaugural winner Ryan Blaney and Aric Almirola recall their initial fears of the course (7:00);

--Marcus Smith recounts his burst of inspiration for creating the layout (9:00);

--Charlotte Motor Speedway executive vice president Greg Walter on the pushback from drivers and teams and the decision to delay the launch (16:00);

--Speedway Motorsports vice president of operations Steve Swift on the international search for advice and insight (18:00);

--Smith on Mario Andretti’s memorable test run in a Porsche 918 (20:00);

--Swift on a very helpful lap by Kyle Busch and a humorous moment with Ryan Newman (23:00);

--The jaw-dropping crash that has NASCAR very nervous (30:00);

--The breathtaking finish to the debut (34:00);

--How the Roval has charted a path forward for NASCAR (37:30).

Visit www.nbcsports.com/nascar and www.nbcsports.com/motors for more NASCAR and motorsports coverage from NBC Sports.

The Charlotte Roval's brief but very memorable history: "Taking risks is the DNA of NASCAR"