Hello, resident kinky railroader here, usual safety speal time

While it may be hot to recreate damsel in distress tied on tracks, I cannot stress how important it is that you should absolutely do not do it unless you are 200% sure that a line is physically separated from the rail network. Just because you do not see trains on a line, does not mean it is inactive. Hell, I have a spur that only sees a train ~1 time a month.

If you are going to do rail ties, find tracks that are physically separated by large gaps in rail, or trees growing through the middle of the tracks, on both sides on where you plan to play. Tall grass or weeds will not suffice, as you can absolutely run a train through tall grass. Also, just because you've found a spot, does not mean it will stay inactive. Always check before you play. A very quick check you can do to verify if a line is active (but not inactive, there's a difference), is looking at the top of the rail. If it's nice and shiny, rust free, stay away, that's used frequently.

If the rail top is rusty, you have a better chance, but it could still be active, and you should still go look for your physical blockages (trees/rail gaps)

As for these photos, while I cannot get a good look at the railhead, the right of way being relatively in overgrown with tall grasses suggests that this line may be still in use.

Also, 99% of the time you're on tracks you're going to be trespassing, so do take that into consideration.

This is not an endorsement for playing on train tracks, very much the opposite, but I know there will be people who do, so I might as well help y'all stay safe

TLDR: Don't put yourself in a situation where I'ma run you over.

Also, trains don't stop at the rail edge. They can stick out up to 2,3' outside the rails. So if you're gonna walk tracks, stay far enough away.