Ponder the red-backed poison frog. In nature, red can issue a warning to predators — stay away, the aposematic message reads. On the road, red can be a warning of its own, often flashing on emergency ...

HOUSTON – Question: Are flashing red, blue lights reserved just for law enforcement officers? Answer: Sergeant Stephen Woodard with the Texas Department of Public Safety says red, white and blue ...

American motorcycle manufacture Harley-Davdson has just announced the release of new flashing LED police mirrors, offering customers the possibility to choose between any combination of red and blue ...

A pair of alternating flashing LEDs makes an excellent visual alarm. One of the LEDs remains illuminated, so there's little chance the alarm will go undetected, even by a casual glance. Several ...