Originally Posted by ironwood

Many years ago I rode across N. America during a particularly hot summer. In order to avoid the heat I went throug Ontario, and had to ride on the Trans Canada Highway where I had to endure hours of "whoosh, whoosh, whoosh", I finally took some dirt roads that took me way out of the way, just to avoid any more traffic. The problem with ear protection is that we need to hear ahat's coming up behind us.

My only suggestion is to avoid heavily travelled roads.