Random Question About Toll Roads

[buford]

When a driver with a TxTag drives through a "coins only" gate, how is that billed? I noticed this morning someone do that and there was no camera flash and the red light at the gate never turned green as it does when I go through the TxTag gate. Anybody know what happens in this case?

[Maddox]

Some coin booths on Beltway 8 have scanners for the toll tags.

[buford]

Some coin booths on Beltway 8 have scanners for the toll tags.

I can buy that, but this particular gate didn't react as the car went through. It was kinda strange.