A robotic transport system including a drive section connected to a frame. An articulated arm coupled to the drive section providing the arm with arm motion in a collaborative space, corresponding to the frame, from a first location, in which the arm has a first shape, to another different location of the arm in the collaborative space in which the arm has another different shape. An electromagnetic affection envelope borne by the arm so that the electromagnetic affection envelope is defined by the arm and is close coupled and substantially conformal to at least part of a dynamic contour of each different arm shape of the arm. A controller connected to the drive section and configured so that in response to detection of entry of a collaborative object into the electromagnetic affection envelope, the controller commands a change in at least one predetermined characteristic of the arm motion.