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From: smb@ulysses.UUCP (Steven Bellovin)
Newsgroups: net.misc
Subject: Re: Do people walk to the left in England?
Message-ID: <702@ulysses.UUCP>
Date: Thu, 17-Nov-83 23:18:55 EST
Article-I.D.: ulysses.702
Posted: Thu Nov 17 23:18:55 1983
Date-Received: Sat, 19-Nov-83 02:14:47 EST
References: <6168@arizona.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 5

My impression was that the custom originated in days of yore -- if you
approached a stranger while on the left side of the road, your sword
could cover him (the relevant case) more easily.  (This assumes, of course,
that you're right-handed, which may bear on the other part of the question.)
But this theory doesn't explain why almost everyone else drives on the right.