id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
22822	Add runway heading (ref) validator	gaben	gaben	"[osmwiki:Tag:aeroway=runway]s have reference numbers and the numbers contain the heading of the ways determined by the magnetic azimuth in that place.

OSM wiki is saying:
> The two designators of a runway will always differ by 18 (180 degrees) and can have one letter appended (L, C, or R)

L = left
C = center
R = right

in addition:
S = STOL runway
G = glider runway
W = water sealane or waterway and
U = ultralight runway

See also https://en.wikipedia.org/wiki/Runway#Naming 
 and https://www.faa.gov/documentLibrary/media/advisory_circular/150-5200-35/150_5200_35.pdf"	enhancement	closed	normal		External rule		fixed	runway heading ref