traffake 

The sudden appearance of traffic on a highway for no other reason than the inability of massive amounts of people that don't know how to drive at highway speeds.

I'm pissed because this traffake added 15 min to my damn drive.

traffake by Volcom13 June 19, 2017

Traffage 

Gravel, bits of mirror, dolls heads, debris that collects at junctions on the bits of road that is missed by the wheels of the the traffic. Often in a triangular shape.

There is a lot of traffage on the last exit from that roundabout.

Traffage by kitkant January 11, 2012