Task 151, FY 2002, "Transportation Security" (Consultant: Various). This project produced material needed by AASHTO's Security Task Force and state DOTs. Two contractors' reports, prepared for the AASHTO Security Task Force with funding provided through the National Cooperative Highway Research Program, are available on the AASHTO web site at https://security.transportation.org/community/security/guides.html. "A Guide to Highway Vulnerability Assessment for Critical Asset Identification and Protection" was prepared by Science Applications International Corporation, and "A Guide to Updating Highway Emergency Response Plans for Terrorist Incidents" was prepared by Parsons Brinckerhoff--PB Farradyne. Contract staff support to the AASHTO Security Task Force is provided by TransTech Management, Inc. (NCHRP Staff: S.A. Parker)