While these aren't my favorite displays, I have to admit that they are interesting: each character is made up of many segments of various shapes, and each cell in the 5×3 matrix has unique shapes, visible on the second image.
These examples are used on lines 2 and 3a of the #Paris #tram network.
Do these displays have a name, by the way? I'd love to know.
(UPDATE: Got my answer; see replies.)