How can I tell if my I-PASS transponder is working?

You can generally tell if your I-PASS transponder is working by observing the indicator lights in specific types of toll lanes. This visual feedback confirms if your transponder was successfully read.

Visual Confirmation in Toll Lanes

The primary method for on-the-spot confirmation of your I-PASS transponder's functionality relies on the feedback provided in certain toll plaza lanes.

Lanes with Automatic Coin Machines

When you use your I-PASS in a lane that features an automatic coin machine, the system provides immediate visual feedback.

• Green Light: A green indicator light typically signifies that your transponder was successfully read and your toll payment was processed. You will often see a "Thank You" message accompanying this.
• Red Light: A red indicator light, often paired with a "Stop" message, suggests that your transponder was not successfully read. In such cases, you may need to adjust your transponder's position or check your account status later.

Open Road Tolling (ORT) Lanes

It is important to note that open road tolling lanes, which allow you to maintain highway speeds without stopping, do not provide any visual indicators regarding your transponder's status or your account. Therefore, you cannot determine if your transponder was read successfully while driving through these lanes.

Summary of I-PASS Lane Indications

The following table summarizes the types of feedback you can expect from different I-PASS toll lanes:

If you frequently use open road tolling lanes or have concerns about your transponder's functionality after observing a red light, it's advisable to periodically check your I-PASS account online to ensure all tolls are being processed correctly and your balance is sufficient.