I tried it on two straight and two curves and it is sparking and it doesn't want to move. It does have two traction tires on the middle wheels, and the other four wheels are black.
EDIT: It doesn't want to move, but when it does it sparks on the front left wheel. Also, the speed controller has to be turned up to 40MPH before it will move, and even then sometimes it has to be touched to move. Once it starts going, it is fine other than sparking. Also, it seems to have a problem with the rerailer section. I am adding two sections of track at a time to form an oval, so far it isn't sparking as much as it was, but still having problems with the rerailer, and getting started.