Explain all interface icons

Many icons are not intuitive to me. Please add a short explanation for each icon on hover!
Some examples (in web browser):

• Some stations show a triangle with 4 dots above - what on earth is that? Some kind of Illuminati Quattro Formaggi?

• Below the route there are a bolt, diverging arrows, heart and share. I can guess what the arrows and share icon might do. But the bolt and the heart?

There might be others. In general, you can assume that icons do not talk for themselves and at least a info on hover is considered good UX.