[DevdogAZ]

How would this lane work? If it's free for carpools but you have to pay if you're solo, how would the transponders know not to charge you if you are generally a solo user but on some occasions have a passenger? Would you play a flat monthly rate so it wouldn't matter, or would you pay a "per-use" fee, which would mean that you would likely get charged at times when you shouldn't be charged if you had a passenger?