Evaluation of Intellizone: A System for Providing Speed Advisories to Drivers Entering Work Zones

Intellizone is a product of Highway Information Systems, which is a division of Quixote Transportation Safety for giving advanced warning to drivers of slowing traffic entering work zones. Intellizone consists of a series of microwave detectors and portable message signs, linked together by wireless communication. Previously, the Midwest Smart Work Zone Deployment Initiative positively reviewed the Travel Time Prediction System (TIPS), another advisory system for drivers in advance of a work zone. Intellizone represents a good alternative to TIPS, but Intellizone lacks the sophisticated logic that enabled TIPS to estimate delays through the work zone instead of speeds at a single point. Intellizone has a potential cost advantage over TIPS because it can work with as little as one sign and one detector.