Thank you for your enquiries.

This link to Wikipedia should give you the overview you ask for.

Concerning conventions:
Your query assumes this is a convention against naming paths forming part of a roadway.

I know of no such convention.  Can you please oblige me.

In most urban places that I pass through the roading reserve includes the carriageway for motor vehicles and bicycles with a footpath an integral part of the construction separated by a kerb and channel for storm water.