No, those are not bullet holes (this is not Nevada :-)). 
Instead of putting the signs on stronger poles, 
they made holes in the signs, 
so the often strong winds wouldn't bend the poles.
Record wind-speed: 80 mph/129 kph
Record low temperature: 12 F/-10 C 
I let you figure out the windchill factor!
The road is often closed during winter storms.
If it's a tropical storm on the beach, call 808 935-6288,
before you head for the summit. 
It's an automated information service, refreshed frequently.

CAT# 47/12