Lots of us have driven outside the US. My impressions/experiences from years ago; Mexico, around Mexico City and on the mountain road to Acapulco traffic laws seem to be an after thought. Do it if you can get away with it. Spain, although Spaniards are generally polite and pleasant they seem to have little patience with foreign drivers especially on mountain roads. Saudi Arabia, many drivers in the Kingdom don't have a lot of driving experience or else little appreciation for the laws of physics. There are large fenced off areas in the desert with many crashed cars. When I was there they favored full sized Chevys and Mercedes. I didn't like driving there at all. Australia, the locals are very tolerant of foreigners but I found right hand drive cars disorienting. Luckily I only drove from the hotel to a beach nearby. Even if I leave to go on vacation again someday, taxis for me I won't be getting behind the wheel again outside the US.