NTCIP is a new data communications protocol that allows computers, master controllers, and field devices to talk to each other regardless of the type of device or manufacturer. These protocols are being developed to ensure the integration of ITS technologies with existing and future electronic highway infrastructure. Although the initial development effort has focused on the interconnectivity of traffic signal controllers; efforts to develop communications protocols for variable message signs, ramp metering devices, closed-circuit television systems, highway advisory radio, and other related devices are already under way. Also, the development of a software package to allow a user to exercise an NTCIP-compliant device is underway. This effort will also provide for the support, maintenance, and refinement of the protocol over the next 3 years.