It's interesting to compare typefaces of road signs across Europe. Frutiger is pretty nice: https://en.wikipedia.org/wiki/Frutiger_(typeface) I like (am used to?) the Italian one too: https://it.wikipedia.org/wiki/Alfabeto_Normale (derived from https://en.wikipedia.org/wiki/Transport_(typeface) ) I don't much care for the Austrian/German ones though: https://en.wikipedia.org/wiki/DIN_1451 - apparently it was designed…
Hey, don't hate on DIN :) For a font designed in 1931, it's impressively timeless. It doesn't seem to communicate any particular era or emotion, so it suits almost anything especially in digital form. Both Google's Roboto and Apple's new San Francisco display fonts seem heavily inspired by DIN (just IMHO of course).
I'm not wholly sure about that; the strict adherence to line thickness and limited set of curvature angles make me feel like it was adapted from the "font" created by necessity when using road-painting equipment to write asphalt road signs. It which lends the font a "we couldn't do better in one case so let's at least unify on something" feeling that's slightly modernist, similar to logos from the 70s that use unnecessary all-caps to look "digital" because they work with green-screens that don't display lower-case.