Hi! To avoid congestion at the toll booths, the ipass illinois automated payment system was developed and quickly gained popularity. It is very convenient to use this system, because when passing through a payment point, the driver does not even need to slow down, payment is made automatically. It is worth noting that the system works stably, but if you notice that you are not charged, then you should contact ipass illinois customer service report this problem, and they will fix it very quickly.