On The Strand
(Look Left / Look Right)
I'm sure a few American tourists have narrowly escaped being flattened by a big red bus by ignoring the signs printed on the street telling them to Look Right then Look Left. Alternatively, you can just look in both directions like we did just to make sure nothing is coming to flatten you.

*1942 the first form of curb drill was introduced - look right, look left, look right again. The Big Red Double-Decker Buses in London have been nicknamed, "Inner-city serial killers", due to the number of pedestrians (tourists) looking the wrong way.