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.

Q: “We live in an area that has a lot of recreational bicycle traffic, especially on weekends. Most riders obey traffic laws, but some do not, especially riding through red lights and stop signs and ...

Q: There are some intersections where the light never turns green when I’m on my bike. Eventually I just look both ways to make sure it’s clear and ride through. But what’s the right way to do this ...