Amalgamated Transit Union (http://www.atu.org)

Brotherhood of Maintenance of Way Employes (http://www.bmwe.org)

Brotherhood of Locomotive Engineers (http://www.ble.org)

Brotherhood of Railroad Signalmen (http://www.brs.org)
 

Int'l Association of Machinists & Aerospace Workers (http://www.iamaw.org)

International Brotherhood of Electrical Workers (http://ibew.org)

Sheet Metal Workers International Association (http://www.smwia.org)

Transport Workers Union of America (http://www.twu.org)

Transportation Communications International Union (http://www.tcunion.org)
 

Transportation Trades Department, AFL-CIO (http://www.ttd.org)