Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
"Simply by way of anecdote...In Illinois, if you elect to pay cash for tolls, they'll charge you twice what you would get charged if you went through the PlatePass (called I-Pass in Illinois) lanes."
But what will Hertz (or the company that supplies the Plate Pass service to Hertz) charge the renter: the Plate Pass rate that they paid, or the full cash rate? Many rental-car companies (or their E-toll providers) charge the renter the full cash toll: that's one of the ways (in addition to the daily fee) that they are able to turn a profit on the service.