London's Drive to Work Day

Chines:

a. The backbone or spine, especially of an animal.
b. A cut of meat containing part of the backbone.

1. A ridge or crest.
   
2. Nautical The line of intersection between the side and bottom of a flatbottom or V-bottom boat.
   
3. Cycle (chining) To give up cycling to do everyone a favour
   tr.v. chined, chin·ing, chines
   To cut (a carcass, for example) through the spine, as when butchering.