The one nice thing about the portable transponder is that it responds with various beeps, reassuring you that everything is working properly and tolls are being taken properly. The I-Pass system up North failed for several days for many Wisconsin holders and you didn't know it until you received a batch of tickets in the mail a few days later. A mess to straighten out! I-Pass transponders do not beep.
The downside of a portable is that you need to replace the battery every few years.
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All of us could take a lesson from the weather. It pays no attention to criticism.
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