Development along rail corridors helps keep the cost of housing down because living next to a freight train line is loud and not desired by many rich folk.
Trains are a little noisy, even without the horns. They thunder by at 2 a.m.
Ever watched a movie at La Paloma? The train's vibrations are a cool part of the experience.
Hopefully, Pacific Station is soundproofed and built to withstand a tank car explosion.
Freight trains are a serious public safety liability. Putting high density immediately next to the freight rail lines risks stretching the public safety and medical response resource closer to black-tag triage if there is a serious accident. What happens to the Scripps Hospital if there is a derailment involving a tanker car with hazardous materials at Santa Fe and Vulcan?
Hopefully, design standards, public safety planning and disaster planning have been adjusted to take into consideration the extra density along the tracks and the proximity of the hospital to the rail lines.
It will never happen in Encinitas. My friends said the same thing until their neighborhood blew up in San Bruno.