Dear DMC,

I live on Martha’s Vineyard , an island off the coast of Massachusetts. A friend recently sent me a link to your podcast on freakonomics radio. He remembered that about 10 years ago, I was a fierce promoter of a proposed roundabout at a particularly problematic intersection on the island.

After about 8 years of fierce debate, it finally got built, and everyone agrees, it works like a champ.

I, by the way hold the unofficial record for continuous rotations on a bicycle, 21 rotations.

I wrote this letter to the editor that I think you might get a kick out of it:

Sincerely (dull men are always sincere, mostly),

Don Keller