Driving school includes plenty of information that seems immediately useful, like who goes first at a four-way stop. But some of what's taught seems outdated, or perhaps even useless. Like hand ...

If you could choose only two things as a staple of any war movie, they'd probably be military jargon (like "roger" in military aviation) and hand signals. Whether it's Easy Company deep behind enemy ...

The use of hand signals is a fundamental element of human communication. Hand signals work whenever there is a need for complete silence and when distance or noise, like when riding a motorcycle, ...