We have all been there: waiting for ages for a bus only for it to eventually come, followed by two more right behind it.
It's a cliche because it's true - and here's the website that finally proves it.
Designed by web developer Matthew Somerville, the Live London Bus Map shows exactly where buses in the capital are at any given moment.
With red dots symbolising buses and yellow ones representing bus stops, the map gives live updates about every bus route in the capital.
Would-be passengers can pick their bus route and then see how far away the next bus is from their stop.
And while using the map will give blessed relief to everyone who's waited at a bus-stop, looking anxiously up the road wondering where the bus is, it also proves that they really do come in threes... or even fours.
Live London Bus Map
Interesting to watch all the buses that are bunched up in groups.