The ARRB is the Australian Road Research Board. Its website says that it “exists to serve the research needs of its Members, and maintain its reputation as a national interest, applied research organisation. Hence, our vision is born: to deliver an ‘adaptable connected future’ for every road user”.
The ARRB has a Knowledge Base, which is a searchable library of documents on topics such as road and bridge design. Many of the documents can be downloaded. The service seems to work, and to be quite useful. Here is the link to the Knowledge Base: