"(Note: may be considered normal or yes pending discussion.)"
Where is this discussion? URL? Surely not "normal" as usually in France or Germany, lowered is rather the norm at crossings and the page seems to be related to crossings (as nodes are referred in the first sentences).
Yes is descriptive. Normal is not. Normal compared to what?
Words are meaningless. Use kerb hight in SI unit
every wheelchair user knows the kerb hight he/she can pass for every used wheelchair. In Centimeters for 99% of the countries on this planet. 0 % of wheelchair users know the table on this page. Stop inventing words for hights. Use centimeters. Allow routing algorithms for wheelchair users to accept user entries in cm and route exactly the needed way.