I will be driving around Spain and Portugal end of December. One of the route is from Seville to Lisbon. I read from Hertz website that we have to buy prepaid Pass since many Portugal highways are toll road with electronic devices.
Please advise if we have to buy in advance or else?
Also do I need to use car for sightseeing in Lisbon or Porto? If we don't need car, is there any parking garage that we can park the car ?