TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) Final Report for NCHRP-IDEA Project 139: Development of a Sensing Methodology for Intelligent and Reliable Work-Zone Hazard Awareness highlights a methodology using vision-based object recognition algorithms to detect and track vehicles intruding into the work zone and to detect missing work zone channelization traffic control devices such as barrels.