On Sat, 02 Sep 2006 21:09:00 +0200, Mxsmanic
wrote:

I was wondering about that. Seems like the airports around me have
had the same runway numbers for quite a while, but maybe my memory is
poor, or maybe I'm in a lucky position with respect to the magnetic
pole.

Since the markings are to the nearest degree, how often would they
have changed in your neighborhood?