I'd like to start this thread which would serve as a database for travellers on the flooring conditions at TSA checkpoints.

As most of us have experienced, The TSA has instituted a policy of "strongly requesting" that its customers remove footwear before walking through Airport Magnometers (a.k.a. "Metal Detectors")

http://www.tsa.gov/public/display?theme=1&content=583

(Since only TSA is persuing this policy, it would seem that these would only be checkpoints inside the USA, but feel free to add any airport that you feel qualifies.)

I've started this since there appears to be no standards for cleanliness or for median surface temperature or for material(s) in use on the path that TSA customers are expected to walk in either bare- or stocking/sock-feet.

Please list the Airport, the terminal or checkpoint location, and the airline(s) whose passengers will likely use this checkpoint. Any additional comments are welcome and encouraged.

As an example: LAX Terminal 6 (serving UA and CO and some of DL) has hard cold stone/masonry floors, no carpets or mats along the path through the metal detector, but there are small rugs at the "Secondary Chairs". The flooring is kept cool by the understandably-cold air conditioning one experiences in Southern California, and this certainly sent a real chill up my spine. Flooring is an off-white color, so there is no ability to determine if it is clean. While I did not suffer any after effects such as influenza, I would avoid this checkpoint on a rainy day. One can reach these same gates by using the TSA checkpoints at Terminal 7 or 8 (8 is sometimes known as "7B")