A Sinister Puzzle

[beamjockey]

One of my correspondents-- an American-- is contemplating a new hobby:

Since I have been to Scotland, Wales, England, Hong Kong, the Virgin Islands (British and American) and now Australia, I was thinking of setting a goal to get to every country where they drive on the wrong side of the street. Since I have NO IDEA what other countries I would have to include on my list, I thought you guys might be able to fill me in when I get back.

How do I find an exhaustive list of countries whose inhabitants drive on the left side of the road?

I think she needs to go to Japan.

Beyond that, I don't know.

I suppose all former British colonies should be examined as potential members of the list.

Comments

[minnehaha.livejournal.com]

"How do I find an exhaustive list of countries whose inhabitants drive on the left side of the road?"

There's an easy algorithm:

Visit every country. Drive on the right side of the road. When you're done, the collection of tickets you have is a list of such countries.

B

[beamjockey.livejournal.com]

There's an easy algorithm:

Visit every country. Drive on the right side of the road. When you're done, the collection of tickets you have is a list of such countries.


This sounds a little like Jerry Corrigan's algorithm for driving while reading:

Bring passengers. Steer to minimize the screaming from the other seats.

(You could probably automate this with a microphone, a servomotor, and a handful of op amps.)