The inaugural run of the <a href="https://en.wikipedia.org/wiki/Baltimore_and_Ohio_Railroad" id="mwSw" rel="mw:WikiLink" title="Baltimore and Ohio Railroad">Baltimore and Ohio Railroad</a>'s <a href="https://en.wikipedia.org/wiki/Royal_Blue_(train)" id="mwTA" rel="mw:WikiLink" title="Royal Blue (train)"><i id="mwTQ">Royal Blue</i></a> from Washington, D.C., to New York City, the first U.S. passenger train to use <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Electric_locomotives" id="mwTg" rel="mw:WikiLink" title="Electric locomotives">electric locomotives</a>.