This one is possibly either already done somewhere or a bit difficult, or I'm just missing something.

I have road lines that are not linearly referenced with measurements, and a separate feature class of reference points containing measurements. The reference points (RPs) lie generally within a few cm of the line and at regular distances along it, so they can be quite reliably related spatially. I want to use the RPs to assign measures to those known locations along the line, then interpolate other measures on the line between and also before/after the RPs (potentially down to each metre) to create what is effectively a measured route along the whole road line. The measure or z value interpolator looks a good option once I have some measures on the line and have then created additional vertices using the IterativeSnipper/LineCombiner (thanks Takashi from another thread).

The aim overall is to then cut this line between specified measures to indicate planned maintenance. Note I do not reliably know the direction the lines were originally digitised in, so I cannot make assumptions on direction, hence trying what I am now. The RPs are the only thing I have to reliably indicate distance and direction on the road.

I can cut the line using the PointOnLineOverlayer, what I then want to do is using the measurement from the RP that is cutting the line to create a vertex on the line and assign the measure to that line.