If the driver does not have funds in the account and are not set up for auto refill on a credit card, the toll will be considered unpaid and a $20 fine will be levied, in addition to the cash rate (non-discounted) cost of the toll. If a driver does not have a transponder in the car, the license plate still registers under the system as being affiliated with an account and, as long as there are funds in the account, the driver will not be in violation, although if more than three instances occur in a month, the discount will not be granted and each subsequent pass without a transponder will result in the cash fee being deducted from the account. Each I-Pass account can register multiple vehicles under the account. If a vehicle registered with I-Pass passes through a toll collection without the transponder, the vehicle will be considered in violation only if the vehicle's license plate is not registered on an I-Pass account. In June 2005, I-Pass became compatible with toll collection on the Chicago Skyway. Starting with a toll rate increase which came into effect on January 1, 2005, a significant discount was granted if an I-Pass was used to pay the toll. Likewise, entering or exiting the tollway system with an I-Pass allows continuous movement through the toll gate, albeit at a decelerated speed of 15 miles per hour (24 km/h). The main advantage to the system was the eventual withdrawal of full-length tollbooths from the tollway system for full-speed open road tolling, while customers paying cash continued to have to slow down onto exit-like automated tollbooths until the spring of 2020. I-Pass transponders can be used at all toll plazas, including those located on entrance and exit ramps. ( January 2018) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources in this section. This section needs additional citations for verification.

Illinois tollway ipass transponder