Traffic lights were first used in London in which year?

More Questions:

The "Boss of the Plains" was a type of what?

The candy PEZ was first sold in which country?

Where on a ship would you find the crow's nest?

Ham is taken from what part of a pig?

What US road sign is typically shaped like a triangle?

The Turing Award is an award given in what field?

What symbol of peace surrounds the globe on the UN flag?

Whose death is a result of the souring of her relationship with her lover Count Vronsky?

From what language did English borrow the word "dollar"?

What's the subject of the 1969 memoir "Thirteen Days"?

Who's responsible for "The Ballad of A Well-Known Gun"?

Who was the French President from 1969 until his death in 1974?

Which confectioner invented the heart-shaped Valentine's Day candy box?

What was the nickname of American frontiersman Christopher Houston Carson?

On which river is the city of Mandalay situated?