A traffic light is a common thing nowadays and you, just like all the other drivers, must obey the rules: if it's green, you pass, if it's red, you stop, and if it's yellow, you act with caution.

The concept of the traffic light actually dates all the way back to the 1860s, where gas-lit signals were placed on the posh streets that lined the Houses of Parliament in London. Of course, back then ...