I must confess I was once a big transportation policy wonk - hopefully 15 years of abstinence have cured any weaknesses thereof. I have been getting active again over the last year and half here in Tacoma and hopefully can still indulge this obsession with a bit of prudence and productivity occassionally, as such, the following.
Proposed: A Sound Transit 2 Funded Expansion of Light Rail in Tacoma Integrating the Existing High Capacity Light Rail Corridor into the Currently Funded HOV Expansion of I-5 adding Bus service as per the same Design Specs as in the Downtown Seattle Transit Tunnel.
Click Here for the High Resolution PDF
Please note that although there is strong precedence for this approach including direct HOV access ramps, as at 320th in Federal Way, and strong general support for multi-modal systems I am not aware of any project that creates a direct HOV-Light Rail connection. Handling the seperation of car pools and HOT lane users from larger vehicles is not designed in this proposal, but is presumably resolvable with a minimum of risk.