See here>>http://washington.org/topics/getting-around?gclid=CIep_aifvb4CFdShtAodczYAEg
https://www.google.com/search?q=Metro+Routes+for+Washington%2C+D.C&rlz=1C1LENN_enUS508US508&oq=Metro+Routes+for+Washington%2C+D.C&aqs=chrome..69i57j69i59j0l4.5546j0j4&sourceid=chrome&es_sm
This is a Simple Dialog Demo.