If you're looking for a way to get past that daily tool booth faster, you may have looked into an RFID toll tag. Here's how they work, and when they might not.

More than two years ago, Hewlett-Packard, the IT and computer products and services provider based in Palo Alto, Calif., started deploying RFID in parts of its manufacturing and distribution chain.

Just a few decades ago, buying things meant going to the bank — your own physical branch, mind you, during the brief hours it was open — to take out cash. If you didn’t have time for that, or ran out ...