Chasing Pauling - Solution

Puzzle Location: 101

Next Puzzle: Tiles

Note the flags on the overpasses. They are semaphore flags, with each pair of flags corresponding to a letter.

K   P

I   X

Many teams were able to decode these flags quick enough to decide (correctly) that they should continue on Hwy 101 into downtown San Francisco, where the headquarters of the KPIX television station is located. Several teams looped around on Hwy 101 to get a better look. One team even went looking for the nearest television in the hopes that we had actually gotten KPIX to broadcast a puzzle.