A Guided Soft Target including a Dynamic Motion Element and a soft body system adapted to form the body of for testing crash avoidance technologies in a subject vehicle, characterized in that the soft body system is adapted to be mounted atop a motorized Dynamic Motion Element and when so mounted is adapted to collide with the subject vehicle while the Dynamic Motion Element is moving, and the soft body system comprises: a plurality of panels (3010, 3020, 1805), the panels (3010, 3020, 1805) being soft and flexible, formed from one or more uniformly-distributed materials and having an overall hardness no greater than 100 Shore OO; the panels (3010, 3020, 1805) being adapted to be removably attachable and re-attachable to each other at intersecting angles to form an interior framework of a Guided Soft Target, the interior framework adapted to support a covering that forms an exterior surface of the body of the Guided Soft Target; and the panels (3010, 3020, 1805) being sufficiently rigid to be self-supporting when attached together to form the interior framework of the Guided Soft Target and when supporting the exterior surface covering of the Guided Soft Target; wherein upon collision between the subject vehicle and the Dynamic Motion Element at least some panels (3010, 3020, 1805) of the soft body system separate from each other without causing damage to the subject vehicle; characterized in that the plurality of panels (3010, 3020, 1805) each have an overall length, an overall width, and substantially uniform thickness, wherein the overall length and overall width are each at least ten times greater than the thickness; the one or more of the panels (3010, 3020, 1805) are at least partially covered in protective fabric covers providing abrasion resistance and surface strength to resist the impact of a subject vehicle and carrying photographic image printing and/or attachment of radar reflective materials; and the Dynamic Motion Element has a width that is less than the overall width of the soft body, thereby minimizing the observability of the Dynamic Motion Element by radar sensors. the soft body system is adapted to be mounted atop a motorized Dynamic Motion Element and when so mounted is adapted to collide with the subject vehicle while the Dynamic Motion Element is moving, and the soft body system comprises: a plurality of panels (3010, 3020, 1805), the panels (3010, 3020, 1805) being soft and flexible, formed from one or more uniformly-distributed materials and having an overall hardness no greater than 100 Shore OO; the panels (3010, 3020, 1805) being adapted to be removably attachable and re-attachable to each other at intersecting angles to form an interior framework of a Guided Soft Target, the interior framework adapted to support a covering that forms an exterior surface of the body of the Guided Soft Target; and the panels (3010, 3020, 1805) being sufficiently rigid to be self-supporting when attached together to form the interior framework of the Guided Soft Target and when supporting the exterior surface covering of the Guided Soft Target; wherein upon collision between the subject vehicle and the Dynamic Motion Element at least some panels (3010, 3020, 1805) of the soft body system separate from each other without causing damage to the subject vehicle; a plurality of panels (3010, 3020, 1805), the panels (3010, 3020, 1805) being soft and flexible, formed from one or more uniformly-distributed materials and having an overall hardness no greater than 100 Shore OO; the panels (3010, 3020, 1805) being adapted to be removably attachable and re-attachable to each other at intersecting angles to form an interior framework of a Guided Soft Target, the interior framework adapted to support a covering that forms an exterior surface of the body of the Guided Soft Target; and the panels (3010, 3020, 1805) being sufficiently rigid to be self-supporting when attached together to form the interior framework of the Guided Soft Target and when supporting the exterior surface covering of the Guided Soft Target; wherein upon collision between the subject vehicle and the Dynamic Motion Element at least some panels (3010, 3020, 1805) of the soft body system separate from each other without causing damage to the subject vehicle; the plurality of panels (3010, 3020, 1805) each have an overall length, an overall width, and substantially uniform thickness, wherein the overall length and overall width are each at least ten times greater than the thickness; the one or more of the panels (3010, 3020, 1805) are at least partially covered in protective fabric covers providing abrasion resistance and surface strength to resist the impact of a subject vehicle and carrying photographic image printing and/or attachment of radar reflective materials; and the Dynamic Motion Element has a width that is less than the overall width of the soft body, thereby minimizing the observability of the Dynamic Motion Element by radar sensors.