The railroad tracks will likely remain on the Del Mar bluffs for decades.

There's always been talk of moving the railroad off the Del Mar bluffs and building a new set of tracks further inland that aren't at the mercy of coastal erosion. It turns out the existing line isn't going anywhere anytime soon. That raises questions about the feasibility and ongoing costs of shoring up the endangered route, the only line connecting San Diego to the rest of the nation. North County Transit District Executive Director Shawn Dona…