Across the United States, drivers are looking up at intersections and noticing a new, unfamiliar glow: small blue lights perched near traditional red, yellow and green signals. They are not decorative ...

The US Navy has brought signal lamp ship-to-ship communications into the texting age. In a recent test, the guided-missile destroyer USS Stout flashed a message in fast light bursts across 250 ft (76 ...

QM3 Karlo Broussard communicates with ships in Pearl Harbor using a signal lamp in the Naval Station Pearl Harbor Signal Control Tower in 2008. US Navy Photo For more than 200 years the signal lamp ...

Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

Red lights mean stop. Green lights mean go. Yellow lights mean be careful. Use caution. Slow down. Yield. It is probably the one part of learning to drive that no one really needed to learn. It’s a ...

Many red lights fail to detect smaller vehicles like bikes and scooters due to sensor limitations. Inductive loops, common in traffic signals, rely on sufficient metal mass to register a vehicle.

Fresnel lenses are designed so their light can be pointed in just one direction, meaning drivers in a lane may see only the ...

It's hard to put a price on safety, especially when we're out riding our bicycles and electric bicycles. This is especially true now that a lot of people are hitting the roads on two-wheelers on a ...