I’ve been downloading and reading the Paris bus maps. I “slice” some of them to include my blogs. While reviewing one of my favorite routes I noticed a yellow triangle next to the street name and saw that the symbol meant that particular stop is not accessible <<aux UFR>>; UFR is the French acronym for <<Utilisateurs de Fauteuil Roulant>> “wheelchair users”. This non-UFR stop is not typical, but you can see the indication on Bus Line 21 traveling toward Porte de Gentilly at the Palais Royal – Comédie Française stop. It’s a limitation of the street and curb.
All buses on all lines are accessible/accessible.
I’ve encountered lots of jack hammering street work over the years. Sometimes this work even improves things. The EU passed legislation around 2005 requiring improvements in accessibility. I understand that hotels and other public buildings must include accessibility considerations when making major renovations. Allons-y!