This is a remarkable statistic: more than 25% of trade between the U.S. and Canada goes over the Ambassador Bridge between Detroit, Michigan and Windsor, Ontario. The bridge, built in 1929, has since 1979 been owned by one individual — Matty Moroun. He also owns duty-free stores and sells gasoline that escapes taxes. The Bridge isn’t quite a monopoly—there is also a tunnel; but the Bridge is more convenient for a lot of traffic.

The Ambassador Bridge.

Hat tip for the post is here. Business Week had a profile of Matty Moroun earlier this year. It’s worth taking a look.