Abstract: Combination fluid pressure and electric operable trip cock emergency brake apparatus for use with railway vehicles including a trip cock device having a fluid pressure portion and an electrical portion, both operable concurrently, when a trip lever thereon is actuated by a trip arm located on the roadway, for providing concurrent fluid pressure and electrical pilot signals to cause operation of a common control switch which in turn, when so operated, actuates propulsion and brake control devices to cause propulsion power to be cut off and an emergency brake application to be effected concurrently. The fluid pressure and electric portions of the trip cock device complement each other to insure that one or the other, if not both, will effect the desired results in an emergency situation.