A toll bridge, also known as a tollway or toll road, is an infrastructure where a fee is charged for crossing the bridge. Other synonyms for toll bridge include pay bridge, charging bridge, fare bridge, and toll plaza. These structures are often constructed to generate revenue for their upkeep and maintenance. Other times, toll bridges are created to control traffic flow in certain areas. Some toll bridges also offer cashless payment options such as electronic toll collection systems through transponders or license plate recognition. Despite the different names and concepts, a toll bridge's main purpose is to provide a safe passageway for vehicles while generating revenue.