I live on a square that’s off a very busy street. And when I fall asleep at night, I can hear taxi cabs driving down the road, one right after the other. London taxis make a very distinctive sound, much different from other cars. It’s sort of like if cars purred like cats do. Yes, like that. When I’m walking down the street with my back to oncoming traffic, I can always hear when a taxi is approaching. I’m very fond of this sound. At night, it lulls me to sleep.

http://www.anglofille.com/2007/04/22/the-first-week/