Did you know?  

Puerto Rico road distances are measured in kilometers but driving speeds are posted in MPH

Gas stations posts the price of gas per liter not per gallon.

The police always have their lights on. That doesn’t mean you are getting pulled over, it’s just to let you know they are around.

It is ok to go through a red light after midnight until 5 am. Treat the red light as a yield, making sure it is safe to go through before proceeding. Use caution!

The main highways you will use while traveling the island require tolls. Most rental cars come with the autoexpreso toll pass.

Some roads in Puerto Rico are extremely narrow leaving only an inch or two between passing cars, especially in parts of Old San Juan. Pot holes are also common, drive attentively.