What Is Illinois Tolls Pay By Plate?

Illinois Tolls Pay By Plate is a system that lets drivers pay tolls without using a physical transponder or stopping at toll booths. Instead of purchasing an I-PASS or other electronic device, the system captures images of your vehicle's license plate as you pass through toll plazas. The Illinois Tollway Authority then uses this information to send you a toll bill.

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This system operates across Illinois toll roads, primarily managed by the Illinois Tollway, which maintains about 286 miles of toll highways. These include the Chicago-area Skyway, Jane Addams Memorial Tollway (formerly Interstate 90), Tri-State Tollway (Interstate 94/294), and Ronald Reagan Memorial Tollway (Interstate 88). The Pay By Plate system works the same way on all these roads.

The basic process is straightforward. When you drive through a tolled area, high-speed cameras photograph your license plate. The system automatically reads the plate number and cross-references it with state vehicle registration records to identify the vehicle owner. A bill is then mailed to the address on file with the Secretary of State's office, or if you have registered an account, you may receive a digital bill through email.

Pay By Plate differs from traditional transponder-based systems because you don't need to purchase or maintain any special equipment. This makes it accessible to occasional travelers, rental car users, out-of-state drivers, and anyone who simply prefers not to use a transponder. The Illinois Tollway estimates that approximately 30% of vehicles on Illinois toll roads use Pay By Plate rather than I-PASS or other electronic methods.

Practical Takeaway: If you drive Illinois toll roads without an I-PASS, your vehicle's license plate will automatically be read, and you'll receive a bill by mail. No special registration or equipment is required for the system to process your toll.

How the License Plate Reading Technology Works

The technology behind Pay By Plate uses specialized cameras and software called Automatic License Plate Recognition (ALPR). These cameras are positioned at every toll collection point on Illinois toll roads and are designed to work 24 hours a day, in all weather conditions. When a vehicle passes through, the camera captures a clear image of the rear license plate.

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The system processes these images in real-time using optical character recognition (OCR) technology. OCR software converts the visual image of the license plate into readable text. This happens within milliseconds, and the information is stored in the Illinois Tollway's database. The technology can read plates in various conditions—rain, snow, glare, and nighttime driving—with accuracy rates typically exceeding 95% in standard conditions.

Once the plate is read, the system cross-references the number with the Illinois Secretary of State's vehicle registration database. This step is crucial because it connects the license plate to the registered owner. The Illinois Tollway has agreements allowing them to access this data for toll collection purposes. For vehicles registered outside Illinois, the system works with other states' motor vehicle departments to retrieve owner information.

The captured images and data are retained by the Illinois Tollway for a set period. According to their policies, images are typically kept for at least several years to support billing, dispute resolution, and enforcement. If there's a discrepancy in reading the plate—such as a plate with obscured characters or an unreadable number—the system flags this, and tollway staff may review the image manually or attempt to read it again using alternative methods.

Occasionally, the system does misread a plate. This can happen if a plate is extremely dirty, damaged, partially obscured, or of an unusual design. When this occurs, the Illinois Tollway attempts multiple readings or may send a follow-up notice requesting information about the trip. This is why having a Pay By Plate account and keeping your vehicle registration current is important—it helps ensure accurate billing.

Practical Takeaway: The system reads your plate, converts it to text, and matches it against state registration records in seconds. If you keep your license plate clean and your vehicle registration current, the system should accurately identify you and process your toll.

Understanding Your Toll Bill and Payment Options

Once your plate is read at a toll location, the Illinois Tollway processes the charge and generates a bill. The amount you owe depends on several factors: which toll plaza you passed through, the time of day, your vehicle type, and your payment method. For example, on the Ronald Reagan Memorial Tollway (I-88), tolls range from approximately $0.70 to $3.50 per trip, varying by entrance and exit points.

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Bills are typically generated and sent to the address on file with your vehicle's registration within 7 to 14 days of traveling the toll road. If you've created a Pay By Plate account on the Illinois Tollway website, you may receive electronic bills via email instead of paper bills, which can help you track your toll usage more quickly.

The Illinois Tollway offers several payment methods to settle your toll bill:

  • Online Payment: You can pay through the Illinois Tollway website using a credit card, debit card, or electronic check. This is often the fastest method and provides immediate confirmation.
  • Mail Payment: Most bills include a payment stub and return envelope. You can send a check or money order by mail. Processing typically takes 7-10 business days after receipt.
  • Phone Payment: The Illinois Tollway customer service line accepts toll payments over the phone using a credit or debit card.
  • In-Person Payment: Some tollway plazas have payment centers where you can pay by cash, check, or card.
  • Auto-Pay: If you create an account, you can set up automatic payments to be withdrawn from your bank account or charged to a credit card on a recurring basis.

Payment deadlines typically give you about 30 days from the bill date to pay. However, if you don't pay by the due date, late fees may apply. The Illinois Tollway adds a $5 administrative fee for unpaid bills. If the bill remains unpaid for 60 days or more, additional penalties and enforcement actions may occur, potentially including license plate suspension or vehicle registration holds.

Practical Takeaway: Pay your toll bills within 30 days of receipt through any available method—online, mail, phone, or automatic payment—to avoid late fees and enforcement actions.

Setting Up and Managing Your Pay By Plate Account

While Pay By Plate theoretically works without creating an account—the system will identify you through your registration and send bills by mail—opening an online account provides several advantages. An account gives you direct control over your toll information and multiple management options.

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To set up an account on the Illinois Tollway website, you'll need your vehicle's license plate number and the state where it's registered. You'll also provide contact information including your current mailing address and email address. Creating an account is free and typically takes just a few minutes. Once active, you can log in anytime to view recent tolls, trips, and bills.

Through your account, you can:

  • View Trip History: See a record of every toll transaction, including the date, time, location, and amount charged.
  • Monitor Accounts: If you drive multiple vehicles, you can link multiple license plates to one account for easier management.
  • Receive Electronic Notices: Opt for email bills instead of paper bills, reducing mail clutter and potentially speeding up your awareness of charges.
  • Update Payment Information: Change your mailing address, email, or payment method without contacting customer service.
  • Set Up Auto-Pay: Arrange for automatic payment from your bank account or credit card each month, ensuring you never miss a due date.
  • Dispute Charges: If you believe you were incorrectly charged or a toll was double-charged, you can submit a dispute through your account with supporting information.
  • Download Records: Generate reports of your toll history for record-keeping, business expense tracking, or other purposes.

Managing multiple vehicles is particularly useful for households with several cars or