By Phil Diehl, Reporter, The San Diego Union-Tribune; February 12, 2019
Five possible routes for moving the train tracks off the eroding Del Mar bluffs were outlined this week by regional transportation officials.
Four of the ideas involve twin sets of tracks drilled or bored through the ground as deep as 270 feet beneath the surface and up to a mile or more inland. The fifth alternative is a deep trench that follows Camino Del Mar, also known as Highway 101, below the roadway through the center of town.