N601's Navacerrada Pass, Madrid to Segovia. N623's Carrales Pass, Burgos to Santander. C142's Bonaigua Pass, Esterri d'Aneu to Viella. Fuel Fuel prices are government regulated, so don't waste time shopping around. Some fuel stations accept credit cards.
Unleaded gasoline is called gasolina sin plomo.
Unleaded super gasoline has an octane rating of 95. Diesel is called gas-oil. All directions Roads marked A for autopista are toll roads. A sign showing a stylized picture of a camera indicates an especially good view. The minimum age of a driver is 18 years.