A Dufie
A way to measure how many dufis are stuck on the road with you. The slower you go, the more dufis are probably being stupid around you.
The Dufi Index is 80. That means there are 20 dufis being dumb around you.
Your Dufi Index is 50. You're halfway to being stuck in traffic forever.
Dufi Index is 100. You're not moving and there's a lot of dumb people around you.