The national Vehicle–Infrastructure Integration (VII) initiative was intended to lead to deployment of cooperating vehicle and infrastructure devices that would make it possible to collect a great breadth and depth of transportation operations data. California and regional stakeholders have specific transportation infrastructure, operating policies and needs besides those addressed with a national VII program. In partnership with Caltrans and the San Francisco Bay Area Metropolitan Transportation Commission, PATH is addressing these needs with a multiyear effort to develop, demonstrate and deploy VII in a key corridor in Northern California. A key objective of this particular study was to demonstrate that the existing VII communication infrastructure could be utilized for broadcasting corrections to vehicles’ GPS receivers. The report provides a description of VII hardware, general network and installation, and then progresses to a more detailed description of the network and operating software. Finally, it describes
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