That's exactly what it is.
The driver's employer pays the toll, bundles tolls into the price of goods and services as a cost of doing business, and ultimately individual customers pay this hidden tax. To add insult to injury, the individual customers may even have to pay sales tax on the price of the goods and services, effectively creating double (or more) taxation.
If Americans understood the true burden of government (because it were really brought out into the open), there would probably be open revolt against the government.
“If Americans understood the true burden of government (because it were really brought out into the open), there would probably be open revolt against the government.”
Which is why politicians fight so vehemently against things like flat taxing, or consumption taxes.