Which tag for an emergency access point?

I intend to start mapping the meeting points of French emergency services. Two tags exist to define these points:
emergency=access_point and highway=emergency_access_point.

I have a preference for the first one which, in my opinion, is not necessarily attached to a highway. It simply defines a precise geolocated point with an emergency number.
The second is, for me, an access site for help close to a communication route.

What is your opinion?
Thanks in advance,