One of our caches is relatively near the tracks and though you can get there otherwise, just about everyone has gotten to it by way of tracks.
I am a bit skeptical of the 150' rule, or rather that it is a nationwide concept. The tracks run right through our town, and the old railway stration -- you got it -- next to the tracks.. so let's say, 5 feet, is a restaurant. Not to mention a load of other businesses within 100 feet of the tracks on all sides.
More than that Patapsco Valley State Park in Md. (which is where our tracks are) basically runs down the tracks/river. An official trail map from the park service will show miles of trails which literally follow the tracks/river. So, at least in Maryland, the State of Maryland isn't doing much to keep people 150' from the tracks.
In Sykesville, the river trail (the non-track way to get to our cache) will run down to the river and along the tracks, all paved, and back into town again -- when it is complete.
Sorry to hear that people in California are more unreasonable, though they do have a big deficit to take care of... every $2030 counts.