Caltrans's own files
The strongest evidence did not come from an outside expert. It came from Caltrans's own records: the 2007 planning document, later characterized by Caltrans in 2022 as a mere concept even though it had in fact been formally approved, along with as-built plans from 2010 and 2011 and 2012 pavement-quantity records that corroborated Caltrans knew exactly what the correct striping should have been and did not deliver it on the ground.