In American English, the inflected forms of travel take one "l" as in traveled, traveling, traveler, etc. In varieties of English from outside the U.S., these forms take two "l's" as in travelled, travelling, traveller, etc. See: grammarist.com/spelling/travel/ and: writingexplained.org/travelling-or-traveling-difference.
Since this is an American based website,
please CLICK HERE to visit: RailTraveling.com.