Barcelona has very strict drink-driving laws, so ensure you do not consume alcohol well in advance of getting behind the wheel. Police can pull you over if they suspect you may have been drinking and will make you breathe into a breathalyser. If your blood alcohol content is between 0.025% and 0.05% you will be fined €500. Whereas if it’s between 0.05% and 0.06% you will be fined €1000. There is also the risk of points being added to your licence. Search car hire on KAYAK