A toll road is a road, bridge or tunnel you pay to use. Signs say TOLL in yellow or show the toll system's name. Many toll roads no longer have people or cash booths. They are cashless: cameras and readers charge you as you drive through at normal speed.
Toll tag (transponder): a small device or sticker on your windshield. It links to an account with your card. Each toll is taken from the account automatically, often at a lower price.
Pay by plate: a camera photographs your license plate and a bill is mailed to the car's registered owner. This usually costs more, and missing the bill brings late fees.
Tag names are different in each region
Each state or region runs its own system with its own name. For example, E-ZPass works in many eastern and midwestern states. Other states have different names, and some tags work in several states. See In your state for yours.
Go to your state's toll agency website. You can also find tags at some stores and service centers.
Open an account. Add your car's license plate and a card. Some accounts need a starting balance.
Stick the tag where the instructions say, usually behind the rearview mirror.
Update the account when you get a new car or new plates.
Some highways have express lanes with a price that changes with traffic. Signs show the current price. Often you need a tag to use them.
Rental companies charge tolls to your card, often with a daily service fee. Read the rental agreement. You can often use your own tag if you add the rental plate to your account, or you can choose a route that avoids tolls (maps apps have an Avoid tolls setting).
Ignoring a toll bill because the address was old. Keep your address current at the DMV.
Two tags in one car, which can charge you twice.
Stopping or backing up at a cashless toll point. Keep driving; the bill comes.