If you love to drive and are bored by driving in the US, renting a car and driving in Costa Rica might just be the adventure of your dreams. It can also be a nightmare. If you choose to rent, be aware that driving conditions in Costa Rica are terrible. There are potholes, very few road signs, and drivers passing on blind curves - some times all at once. Thieves and traffic cops looking for bribes routinely target rented cars. Road signs are scarce, maps are approximate, giving precise directions is not a one of Costa Rica's national strengths, and, most important, the unwritten rules of the road are very different from what you are used to.
If you are still not daunted and your philosophy is, "I can't be lost, I'm here," keep scrolling down for three of the most important differences you should know:
1. Just like in the US, rolling stops are illegal. However in recorded history no one has been cited for a rolling stop in Costa Rica. A rolling stop at a stop sign in the US means you may get a ticket. A full stop at a stop sign in Costa Rica means you may get rear-ended.
2. In the US, passing on a blind curve is a sin. In Costa Rica not letting somebody in who passes on a blind curve may be a mortal sin. When you see a big slow truck in the oncoming lane, be ready for the guy behind him to be passing him -- and the woman behind you to be passing you.
3. Understand that driving in the US and driving in Costa Rica stem from vastly different cultural traditions. Driving in the US is derived from the lore of the Old West. There may be a veneer of courtesy, but down deep it is the showdown at high noon. If you back down your very manhood has been compromised - womanhood too. Hence road rage.
Driving in Costa Rica on the other hand is inspired by the ancient tradition of the bullfight. How close can you get without getting hurt. The driver who cuts you off in Costa Rica is not insulting you. He's playing with you. Your role in the game is to not get cut off, as long as nobody gets hurt. Hence everybody tailgates.
The best way for you to handle this is the same as for newcomers to all games: play, but play by local rules; don't play too intensely; and expect to lose. Defensive driving at all times is the key. If you happen to be driving through the old capital of Cartago, lighting a candle to the Virgin of Los Angeles can't hurt.
If we still have not scared you off, it is important that you understand that the rules and policies regarding car rental in Costa Rica are even more in favor of the company than they are in the US. Before renting a car in Costa Rica you should make yourself aware of the differences and be sure that they are acceptable to you.