How to map an utility tunnel

Hi, how to tag an “utility tunnel” where AC/DC, telecommunications (optical fiber) and other type of cables pass, which can be accessed by the maintenance team on foot, 2m height
something like that? I’m not sure
tunnel=yes
layer=-1
height=2
access=private
utility=power;telecom
Do you know something more suitable?
Cheers

Not sure I’ve seen anything along those lines. I’d go straight access=no on something like that.

The layer tag isn’t needed unless it crosses something else.

It might need some sort of highway tag. Maybe =path or =alley?

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Technically it’s still a man_made=tunnel first. Only that =footway + access=no is easier ti add.
height= is ill-defined on a tunnel, since there are many measures of cross-section and clearance. On a highway=, it would be maxheight:phsyical=, however this excludes headroom from any structure on top of the tunnel cell.
utility= on a =footway might not be very meaningful, although I might add it anyway.