 A recent example of this relates to the well-known Cob at Porthmadog, where tolls ceased in 2006, when it was nationalised by the Welsh Assembly.Tolls are similarly collected to finance the cost of building the Humber Bridge and Severn Bridge.In recent times, the concept of charging tolls to finance the building of roads has been revived, but so far the only new toll road is M6 Toll.