I've been collecting general observations and other data on the interaction
between tram and heavy rail surfaces over a period of many years, and equally
observed 'solutions' and their effectivenes. There may be issues &
indicators - the UK standard is for the railhead to be flush or up to 6mm
proud, yet other systems seem to go for sunken up to 6mm. As the railhead
wears the flange guide effectively becomes the high spot. The interface
rail-road is often the boundary of responsibilities and what happens when the
boundary needs attention? The standard rail profile also seems to provide a
precise fit to grab the typical tyre size used on commuter bicycles and hold
it rigidly. Should the flangeways be cleaned to remove oily debris and wet
leaves, or does this make no difference to railhead condition?
These questions and other details may have been debated and researched
already, and it would be useful to know of any contacts who can provide
information or papers to support those commenting on or actually planning the
growing range of LRT/tram systems due for the UK over the next 10 years.
Dave Holladay
NB student on Cranfield Railway Engineering postgrad course (1976) although
I'd expect to do some catching up...
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