Theory Tester

What does this sign mean when displayed on the approach to a motorway?

Explantion: This sign is used at motorway toll plazas to direct traffic into a lane where the toll charge is collected electronically. When the vehicle passes through the plaza it is identified by means of an electronic tag fitted to the front windscreen. Payment will be collected via the user's account. Only vehicles fitted with the tags are allowed to use those lanes.

Traffic Signs and Regulatory Matters