<a href="https://en.wikipedia.org/wiki/Amtrak" class="extiw" title="wikipedia:Amtrak">Amtrak</a> map showing service type and frequency by color and line thickness.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Blank_US_Map.svg" class="mw-redirect" title="File:Blank US Map.svg">Blank_US_Map.svg</a> by <a href="//commons.wikimedia.org/w/index.php?title=User:Theshibboleth&amp;action=edit&amp;redlink=1" class="new" title="User:Theshibboleth (page does not exist)">User:Theshibboleth</a>; <a href="//commons.wikimedia.org/wiki/File:Amtrakfreqmap.svg" title="File:Amtrakfreqmap.svg">File:Amtrakfreqmap.svg</a> by <a href="//commons.wikimedia.org/wiki/User:Samuell" title="User:Samuell">Samuell</a>; <a href="//commons.wikimedia.org/wiki/User:PerryPlanet" title="User:PerryPlanet">PerryPlanet</a></li></ul>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Amtrakfreqmap.svg" title="File:Amtrakfreqmap.svg">File:Amtrakfreqmap.svg</a>