There’s nothing like exploring a country at your own pace, free to take the road less traveled when and if you choose. While Europe’s many highways and byways make for a glorious road trip, there are some rules that every driver must be aware of.Enterprise Rent-a-Car knows that travelers would rather spend their time taking in the sites than studying the International Driver’s Ed Handbook and has created a quick primer on international driving rules and tips:France—When parking, park in the same direction as traffic flows.—Use of the horn is reserved for immediate danger. —U-turns aren’t permitted, nor can you cross a solid white line.—Unlike in the United States, vehicles entering from the right have priority in cities and towns.Germany—As throughout much of Europe, talking on the phone while driving is illegal.—Driving Germany’s famed Autobahn is on many people’s bucket lists. To ensure that it’s not literally the last thing they do, German authorities suggest keeping to a speed limit of around 80 mph unless otherwise posted.—While on the Autobahn you can only pass another vehicle in the left lane.—Running out of gas on the Autobahn is not only dangerous but illegal.Ireland —Come prepared to prove who you are. At the time of rental, all drivers must show a valid driver’s license, plus two proofs of address including photographic identification. Overseas renters must also produce a passport.—M is for Motorway. N is for National Road. A and B stand for primary and non-primary roads. —Stay off the phone while driving. It’s illegal. —Lay off the horn between 11:30 pm and 7 am.WATCH: Enterprise Rent-A-Car: Always Treating Customers SpecialSpain—If the name of your motorway starts with “AP” (autopistas), then you’d better have change—it’s a toll road.—Radar traps are frequent along with the fact that fines must be dealt with on the spot.—When no priority sign is listed, yield to traffic approaching from the right.—Buckle up no matter if you’re in the front or back seat. It’s the law.United Kingdom—Stay to the left: Pass traffic islands to the left, use roundabouts clockwise and make a left when entering a motorway.—Driving into central London brings with it a congestion charge. Ask your travel agent about places where it’s smarter to park at a station and take the Tube.—Gas stations can be few and far between in some areas. A good rule of thumb is to fill up once your tank is half empty.—There’s no right on red in the UK.