In Pennsylvania, I once rode my bike on a 55-mph, four-lane divided highway that is designated as an official bike route[0]. Traffic was sparse on the road so i

In Pennsylvania, I once rode my bike on a 55-mph, four-lane divided highway that is designated as an official bike route[0]. Traffic was sparse on the road so it objectively probably wasn't too bad, but it wasn't a pleasant experience to have cars rush by you at those speeds. [0]: http://bikepa.com/routes/index.htm http://bikepa.com/routes/index.htm