[1] The state government is contributing $250 million to this project, mostly coming from the fuel tax levied by SB1, known as the Road Repair and Accountability Act.
[3] The highway expansion faces opposition from environmentalists, who argue that "expanding the amount of space we dedicate to cars not only fails to speed up traffic but also accelerates the breakdown of ecosystems that support life on earth.
[3] The wooden trestle crossing San Elijo Lagoon was demolished in 2018, after 74 years in service, and was replaced by a modern double-track concrete structure.
[4] Work is ongoing on a similar project at Batiquitos Lagoon, including a bridge replacement and 1.2 kilometres (0.75 mi) of new double track.
[1] San Elijo Lagoon will receive $80 million for restoration efforts, such as dredging and filling to bring sediment to natural levels, as well as additional conserved area to mitigate the impact of the new road and rail bridges.