Hi-pass

Hi-pass (Korean: 하이패스) is the name of an electronic toll collection system for the expressways in South Korea that allows motorists to make wireless toll payments, without the need to stop.

[1] It uses DSRC (Dedicated Short-Range Communication), allowing for automatic settlement of tolls, by communication between the car terminal and the toll gate equipment.

From the highway toll gate to the high-pass lane, it is a blue line.

If you accidentally pass through the toll gate with a high-pass lane even though you don't have a high-pass terminal, you can explain it to the staff at the last toll gate.

This article about transport in South Korea is a stub.