What are the pink and orange dots? I know they are checkpoints but
what are they?

The controllers are refering to spots on the runway that they want the
aircraft to land on. This allows some to land long and some to land
short simultaneously, greatly increasing the number of arrivals that
they can handle. Should be mentioned in the NOTAM he

http://www.airventure.org/2006/flying/notam06.pdf

Ahh. I did not see the dots on the web site I referenced, so I did not
realize he was talking about the dots on the runway.

For the responder, the dots are there to make it real quick to tell the
pilots where they want the planes to touch down. Rather than saying "Fly
down the runway, until you have passed the 3rd taxiway intersection," they
can say "land on the orange dot" and it is quickly seen and understood.

This is done so planes coming in close together can land and slow further
apart, safely. It is amazing, how well it works.
--
Jim in NC