The project is funded through preliminary engineering and environmental clearance. In late 2015, SANDAG completed an environmental assessment for the Federal Railroad Administration (FRA) under the National Environmental Policy Act (NEPA). The FRA is the lead agency for the environmental review. In January 2016, the FRA issued a Finding of No Significant Impact. Although not funded through construction, this project is expected to be completed by 2030. 

SANDAG has secured $9.5 million for preliminary design and environmental studies. Funding sources include $2.6 million in local TransNet funds, and $6.9 million in Passenger Rail Investment and Improvement Act (PRIIA) funds from the FRA. The total project cost is estimated to be $179 million.