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To: one_less who wrote (3922)3/26/2007 6:13:46 PM
From: Tom Clarke  Read Replies (2) | Respond to of 5290
 
A brief history of traffic patterns

Have you ever wondered how people came to choose what side of the street to drive on? Cecil Adams of The Straight Dope has some interesting answers:

In the Middle Ages you kept to the left for the simple reason that you never knew who you'd meet on the road in those days. You wanted to make sure that a stranger passed on the right so you could go for your sword in case he proved unfriendly. This custom was given official sanction in 1300 AD, when Pope Boniface VIII invented the modern science of traffic control by declaring that pilgrims headed to Rome should keep left.

The papal system prevailed until the late 1700s, when teamsters in the United States and France began hauling farm products in big wagons pulled by several pairs of horses. These wagons had no driver's seat. Instead the driver sat on the left rear horse, so he could keep his right arm free to lash the team. Since you were sitting on the left, naturally you wanted everybody to pass on the left so you could look down and make sure you kept clear of the other guy's wheels. Ergo, you kept to the right side of the road. The first known keep-right law in the U.S. was enacted in Pennsylvania in 1792, and in the ensuing years many states and Canadian provinces followed suit.

In France the keep-right custom was established in much the same way. An added impetus was that, this being the era of the French Revolution and all, people figured, hey, no pope gonna tell ME what to do. (See above.) Later Napoleon enforced the keep-right rule in all countries occupied by his armies. The custom endured even after the empire was destroyed.

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