A project to upgrade the technology network crucial to highway safety and responding to crashes has hit such big problems it had to be redesigned and rebuilt The network has now gone live, but other weak tech safety systems at NZTA remain in limbo despite the "critical risk" from hacking or breaking down. And the agency is refusing to reveal much about its troubles on upgrading of the Intelligent Transport Systems Network ... RNZ's Phil Pennington spoke to Corin Dann.