MARC CASPE Security perimeter standards and physical-barrier technologies have rapidly developed in recent years due to increasing threats to buildings and human lives. Security perimeter technologies require assessing all risks and vulnerabilities. Based on crash-validation test standards, innovative technologies are available using analytic simulation tools followed by prototype validations. Attractive antiterrorism designs now can provide landscaping of city streets without deep excavations. Photo: Courtesy of KKCS Simulations and actual crashes fine-tune design process. “The Specification for Vehicle Crash Test of Perimeter Barriers and Gates” was first published in 1985 by the U.S. Dept. of State and then revised in 2003.