I have paid $1.00 for a one way trip, although the bus driver refused at first.. I had the correct money for all our group. I told him the web site and kiosks all say you can pay on board.. after he let everyone else on.. he then let us on.! I have no idea why he did this.. ,maybe he was having a bad day??
I'm very surprised to find out that this option exists.
I just tried the ART 1-888 number, but no one picked up. I've sent an email to the ART info email address asking about these one way cash fares, and will report back if I receive a reply.
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EDIT: I just received an "out of office until tomorrow" email, so it will be at least Tuesday before I hear back. If anyone wants to try the ART info number, it is: