Channels and Instrumentalities of Interstate Commerce
Channels of interstate commerce are "the interstate transportation
routes through which persons and goods move." These channels include
highways, railroads, navigable waters, and airspace, as well as
telecommunications networks, and national securities markets.
Instrumentalities of interstate commerce, by contrast, are the people
and things themselves moving in commerce, including automobiles,
airplanes, boats, and shipments of goods. Instrumentalities of commerce
include, as well, "pagers, telephones, and mobile phones."