[katana]

Very old. Only one execution for treason in the US. William Bruce Mumford, 1862, for pulling down an American flag.

Maybe Julius and Ethel Rosenberg don't count (espionage conviction), but their crimes added up to treason, nonetheless. I-40 could justifiably be decorated with Democrats like Cassius decorated the Appian Way after the Spartacus Revolt.

[katana]

Oops, Crassus.

[Reily]

I-40??? You have obviously never been in the DC area. Try I-95 or even I-68!