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INTRODUCTION The need for unmanned tele-operated robotic vehicles has risen to public awareness with the successful use of such devices in the search and rescue effort following the September 11, 2001, disaster. Although robots have long been used in search efforts and homeland security missions such as explosive ordnance detection and disposal, perpetrator location and observation, and similar military applications, their major strength of interrogating areas impenetrable by humans while keeping their human operators out of harmâs way is now being realized. Robot systems include a wide variety of remotely controlled vehicles equipped with cameras, sensors, and other navigational instruments to provide feedback to the user at a control station. Payloads can include additional sensors such as X-ray cameras; nuclear, biological, and chemical hazard detectors; bomb disarming devices; weaponry; and a variety of other deployable systems such as medical supplies. The objective of this report is to aid in the appropriate selection of a device for various transit scenarios. Targets of Attacks on Public Surface Transportation Systems (1920â1997) Used Against Surface Transportation Systems (1920â1997) By permission of the International Institute for Surface Transportation Policy Studies 1
