Union Pacific Corp. says new technology meant to prevent train accidents is causing congestion on the railway.

Today, the physical Internet is an amorphous construct, with its scope and limits undefined. If its full potential is ever realized, then it will have the power to transform the movement of goods and people.

Some of the Chinese ships U.S. authorities allege have helped North Korea evade trade sanctions sailed from ports like this, in Linhai, China, a depressed shipbuilding town.

Should we be concerned? Truckers seem to be running out of room.