New in town, toll question

I'm here on vacation and Google routed me onto the Harris toll road even though I put no tolls ( facepalm) I don't have ez tag obviously since I'm from Oklahoma. How do I pay this or avoid a violation? I was just trying to pay but there's nothing on hctra.org yet. The toll authority in our state is pretty forgiving if you accidentally take a toll and let's you pay same day without fines. Can anyone give me some more info? Can I pay or am I just shafted into getting a ticket? Thanks for helping me out