For large, easily readable lettering - subway stations, highway signs, billboards etc. - I've found the best combination of readability and pleasantness is Aven

For large, easily readable lettering - subway stations, highway signs, billboards etc. - I've found the best combination of readability and pleasantness is Avenir https://en.wikipedia.org/wiki/Avenir_(typeface) https://en.wikipedia.org/wiki/Avenir_(typeface)