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 ...

Question: My husband and I are wondering if it is true that emergency vehicles can change a light from red to green if they need to proceed through an intersection. Is this true, or is it just a myth ...

Have you ever heard the sirens of an ambulance or firetruck behind you while driving and felt unsure of what to do? Knowing how to respond in these moments can help save lives. Properly yielding ...