I tried that double-sided white tape on some temporary trackage (laid partially on cardboard!) during the early-construction phase of my (non-climate-controlled) Mojave desert garage-filler, to anchor flex, some of which was curved but not pre-formed.
Performance was, in a word, unsatisfactory.
It stuck well enough - too darned well, in fact - to the plastic ties - but not well to the plywood and hardly at all to the cardboard. Side thrust caused the track geometry to change enough to warrant relaying with track nails to convince things to stay put.
That stretch of construction tramway lasted less than two months. Two months later I was still trying to get the last of the white goop off the flex track.
Since that time, all of my permanent tracklaying has been done with pre-formed flex and latex caulk. Some of it has been in place for three Mojave Desert summers without giving me any problems.
Chuck (Modeling Central Japan in September, 1964)