PIARC have recently released an update to their report upon the design and operation of complex underground and interconnected interchanges. For our Australian colleagues, we would encourage you to take a look at the report, it provides some very useful insights for those considering WestConnex Stage 3B, and the interface with the planned Western Harbour Tunnel Beaches Link (WHTBL) projects. The report provides some great insight into the implications for safety, ventilation, way finding and operations.
A key observation is the section dealing with "the multiple interfaces between operators and the organisational structures, and the need to create a “Coordinating Entity” between the various operators" ...
and their support for our 'soap box', a global or systems analysis of:
It is also very interesting to see the global examples of intermodal interchanges, and of complex tunnel safety & fire modelling.
You can download a copy of the report from PIARC with a visitors login, or from the link below.