Taxi lanes
Often, in congested airports, 2 narrow-bodies can taxi opposite each other in the space that can accommodate only 1 wide-body. In the case at SFO, the center (wide-body) lane is diamond-marked, and the other lanes are the east and west lane.
37°36'44.48" N 122°23'14.31 W in google earth
will give you an idea of what it looks like
Last edited by sb_sfo; 17th Jun 2013 at 17:53.