Airport runway sign

[Quartz-1]

Why are Airport runway signs only at ground level? How do pilots read them from the flight deck?

I'm asking after the yellow and black signs

[Airbanda]

They're looking out of the windows and can see them just like the runway markings.

They don't want them high like road signs as they'd be a hazard and subject to jet blast etc.

[Quartz-1]

Thanks . I hadn't considered the wind issue.

[chevvron]

Airbanda

And wingtips and propellors etc.

[wiggy]

Quartz-1

As others have said they are ground level to ensure wingtip/propellers/podded engines often project beyond the taxiway edges.

They're made big enough to be easy to read, even from an elevated flight.