Where would the money come from to open the Alto Tunnel?
There are a variety of potential transportation funding sources for the project. In addition, once a commitment is made to making a capital project a reality, new funding sources often emerge. The 1100 foot long Cal Park Hill Tunnel is being funded by the Bicycle Transportation Account, Transportation Funds for Clean Air Program, Transportation Enhancements, and Regional Measure 2, through a collaborative effort by the County of Marin and Sonoma Marin Area Rail Transit (SMART). When assessing the costs for Alto Tunnel, it is important to also look at the costs for other transportation projects. The HOV gap closure project which added one traffic lane along Highway 101 for 4 1/2 miles from Terra Linda to Larkspur cost more than $150 million. It will cost $800 million to widen the Highway one lane in each direction from Novato to Petaluma.
