the carriage 1 in one direction along the tracks 13 in a complete track system there would be many spaced vertical members 19 located along the path of desired travel each having a cantilevered bracket 17 and superstructure 15 to suspend the attached tracks 13 above the ground between the tracks 13 and the bottom of platform 3 is a track spanning rubber bar member 20 carried with and attached to the platform a conventional electrically operated solenoid 22 fixed to the bar member 20 and the platform 3 causes the bar to reciprocate vertically when actuated to contact the tracks 13 and act as a brake to stop the movement of the carriage normally the solenoid 22 and its carried bar 20 are spaced above the lower tracks 13 as the carriage moves along the tracks and then lower when stopping of the carriage is desired fig2 is a side view of the surveillance camera vehicle 1 of fig1 along with its carried lower conventional video camera 21 having power zoom and focusing capabilities the vertical support structure 23 extending from the platform 3 for the depending camera 21 can be moved upward and downwardly like a telescope or rotated by an internal conventional electrically powered motor not shown when in use to allow for a completely unobstructed view by the camera the same support structure also allows the camera to be independently rotated around a center axis 360 degrees when in its surveillance mode to prevent damage to the camera while traveling along the supporting tracks 13 the camera is normally retained in.