I run a Chance CP Huntington. We have about 3/4 of a mile of track, all through beautiful wooded scenery. It is 2 foot gauge and while small, packs the same amount of responsibilites and dangers and the standard gauge stuff.
We use it as a scenic excursion not as an "amusement ride" like some consider these things to be (which they are NOT). Everything on the real stuff is on and must be done to this thing. Running it is far from push the throttle and go contrary to popular belief. The track has to be watched, gauges checked from air to temperatures to whatever else. The train has to be watched, passengers need to be seated and behaving and we have no problem stopping the train if necessary to deal with passengers not following the rules, etc, etc. Our locomotive (1995 BLT.) is one of the last built before computerized technology was built into them where the computers respond to a problem. Not here. You have to listen to the way the engine is responding (it is powered of a 4 cyl. gasoline engine), plan your braking and accelerating, listen for wheel-slip, radio, etc. Everything listed above for the standard gauge stuff has to be watched on my little engine. Just because it is small and runs off a gasoline engine doesn't mean it can't kill you or hurt you if it wants to.
Exactly the same standards, methods, requirements, etc are there for the track and associated equipment as well. We have already begun some of our annual track work, with the majority of it to likely start in the next week or two as we "finished" our operating season this past Saturday (cut short due to storm) and depending on the storm, may run our last scheduled day Wednesday. This isn't the 3-rail tubular track that snaps together at home, and the 80-100 people's lives in your control behind the engine can't be replaced should something happen. There is no room for error regardless of the size or gauge.