The now approved transit plan for Austin,Texas will implement the new light rail lines and more importantly included in Project Connect is a downtown connector tunnel. It will not be a long tunnel with a length of around 1.6miles, nevertheless it is an important component of the plan as it will provide connection between all rail and light rail lines between the Fourth Street line and the planned Republic Square line. It is estimated that the tunnel would cost $2.5billion.

For those who want to read the Capital Metro's press release:

Austin City Council and Capital Metro Board Approve Final Project Connect Transit Plan

Austin's critical transit system expansion moves one step closer to possible November election and sets the stage for Austin's future.

AUSTIN, Texas - In a joint session with the Austin City Council today, the CapMetro Board approved the final version of the Project Connect Recommended System Plan, which includes multiple locally preferred alternatives. This critical milestone means the program will now proceed with discussions on investments this summer, leading to a transit referendum for voters in the November election.

Project Connect is a bold plan for a high-capacity, regionally connected system that is designed to help ease congestion, reduce carbon emissions and provide equitable transportation options for every resident. The expanded transit system is designed to offer more access to opportunity for education, health care and jobs.

The approved plan includes four new rail lines, 15 new fast and frequent bus routes, additional stations and frequency on the Red Line, 24 new Park & Rides and the transition to a zero-emissions fleet. A key component of the plan is an innovative downtown transit tunnel, which will separate transit services from street traffic - enabling faster, safer and more reliable travel.

“With Austin's population expected to double by 2040, Project Connect is the right plan for a public transportation system capable of responding to that growth,” said CapMetro Board Chair Wade Cooper. “Getting final approval on the plan is a major milestone as we move forward on realizing this bold vision for Austin's future. We're proud to have worked closely with the community to ensure Project Connect has a positive impact on our future.”

Over the last two years, CapMetro has collected community feedback from nearly 60,000 community members, conducted hundreds of community meetings and worked closely with city staff to design the Project Connect transit plan. Additionally, more than 4,000 people shared feedback in recent weeks through a series of virtual community meetings and a virtual open house.

“Now more than ever, Austin needs a transformative mobility plan and we finally have one - created and embraced by our entire community,” said Mayor Steve Adler. “This comprehensive transit system will make our city more equitable while helping us fight climate change and ease congestion.”

Project Connect would help jumpstart the region's economic recovery by providing a clear investment return and jobs. Economic benefits include:

    Every dollar invested in public transportation generates approximately four dollars in economic return.
    Approximately 21,800 jobs will be supported for each billion dollars spent - equaling more than 200,000 jobs over the length of the project.

In August, the City of Austin and Capital Metro could take action towards the creation of a joint oversight board - Austin Transit Partnership - that would administer federal and local funding and be responsible for the construction and implementation of Project Connect.

https://www.capmetro.org/About-Capital-Metro/Media-Center/News-Stories/2020-News-Stories/4294972377/