ViaMichelin: Michelin route planner and maps, restaurants, traffic news and hotel bookingHow much are the Tolls from Lisbon to Algarve ?
Do they still have manned booths to pay the Tolls?
You need to be more specific on your route. Portugal uses overhead Auto Tolls on some roads and manned/unmanned booths on some roads.
Shurley, the classes of vehicles for autotolls are only to do with the height and number of axles, unless it has changed from my HGV days. Has this emissions part of Autotoll stated recently?