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Glideslope panels (see AIM 2-1-2-e, "Alignment of Elements Systems") are even rarer than tri-color VASI. Cheapness is the big advantage, but they're only usable on short final (3/4 mile.) Here ya go: 1N5 Bennett 2W2 Clearview Airpark D49 Columbus Municipal E05 Hatch Municipal FRR...

I've seen controllers tack the red/green flashing signal on the end of other signals. Green (clear to taxi); alt red/green (use caution). Don't know why they think that's necessary. It should go without saying if you're using light signals and is more likely to add confusion than anything else.

Sorry, it’s proprietary. Raw data can be had at the FAA website if you want to roll your own.

Your guess is as good as mine, but the A/FD agrees with the list for the ones I’ve checked.

Heh, no. I compiled it with simple DB query (to satisfy my own curiosity) and wondered if there was anything online to compare it with. Discovered this thread and thought I might as well contribute.

There are currently 21 fields (29 runways) with tri-color VASI. They're being phased out; only PAPI is approved for new installations. 29 08R Richmond 28 0G0 North Buffalo Suburban 35 0TE4 Hilltop Lakes 36 1C1 Paxton 15 2A6 Holly Grove Municipal 33 2A6 Holly...