Barrier toll system

There are two main methods by which planners may prevent such toll evasion. One method is to simply remove highway entrances after and exits before toll plazas, so that detouring around toll plazas becomes such an inconvenience that most users will not bother. Another method is to place toll plazas on exits before and entrances after mainline toll barriers, so that all users will always have to pay at least one toll, regardless of entry or exit point. The second method is sometimes called a "barrier-ramp" system; it can be deemed open or closed, respectively, depending upon whether it is consistently applied to all entrances and exits, or only some of them. Examples of the second method may be found on the Everett Turnpike, the Garden State Parkway, and the Autostrada dei Laghi.

The barrier toll system can create more congestion than the ticket system, since it forces all motorists to stop for several toll plazas each time they travel down the highway. Open road tolling can alleviate this issue by allowing most users to proceed through the barrier at full speed.

Highways where used

The following is a list of some toll roads that use the barrier system:

• Maine Turnpike
• Everett Turnpike
• Blue Star Turnpike (only one barrier exists for both directions of traffic in Hampton, plus the interchange with NH 101 also in Hampton)
• Garden State Parkway
• Delaware Route 1
• Delaware Turnpike (only one barrier exists for both directions of traffic in Newark)
• West Virginia Turnpike
• Indiana Toll Road (between the Illinois state line and Portage toll barrier; a ticket system is used from the Portage toll barrier to the Ohio state line)
• Ohio Turnpike (barrier tolls collected in both directions at Westgate and westbound at Eastgate; a ticket system is used between Swanton and Newton Falls)