Miami-Dade’s Transportation Planning Organization has released the results of a tunnel feasibility study.
Two options to build are presented, along with a no-build alternative.
The most direct route, “reverse curve,” is estimated to cost $1.1 to $1.3 billion depending on construction type. Length would be similar to the recently built PortMiami tunnel route.
A more expensive alternative takes the tunnel route underneath Bayfront Park to avoid issues with construction near existing buildings. It would be a lengthier tunnel, costing $1.4 to $1.7 billion.
The TPO recently voted to add the tunnel to the 2040 long-range plan as an unfunded project, and to urge FDOT to fund a PD&E study needed to advance.