Those pics are absolutely SUPERB - never seen better, ever!
But, to clarify the super-elevation/cant confusion:
"Super-elevation" has an absolutely specific meaning - it is the difference in relative HEIGHT between the higher and lower rail.
"Cant" (apart from non-engineering meanings) means the ANGLE produced by that super-elevation.
For example (assuming standard gauge track of 56.5 inches)
One might require a cant of 3 degrees.
That calculates to a super-elevation of 3 inches
Using small imperial figures as in that example, it can readily be seen that the numbers are near enough the same and hence the casual substitution of terminology: admittedly a lot easier to write cant than super-elevation!
Nevertheless, they are not the same UNITS and this becomes immediately obvious when larger numbers are used.
For instance, if one requires a cant of 45 degrees,
then one requires super-elevation of 56.5 inches.
The numbers are now a long way apart and cannot be substituted.
One may justifiably say, those are unrealistically high figures in practice - so let's go a stage further.
UK has been officially metric for a good number of years.
Reverting to the first example, we now require a super-elevation of
75mm to produce a cant of
3 degrees.
The figures of 75 and 3 are now obviously far from interchangeable and hence the real need to use unambiguous terms.
In summary
Super-elevation is the difference in rail height, expressed in whatever units one desires.
Cant is the slope produced by that super-elevation, normally expressed in degrees.
No denying the casual practice of UK in using the 4-letter 'cant' interchangeably, but it has always been ambiguous and, in world terms, out of step and plain wrong.
UK is gradually (and largely unwillingly!) being dragged into the modern age of International Trade and International Standards.
Many examples of confusingly ambiguous UK practice being forced into line with World Standards can be found in the following British Health and Safety Executive document.
HSE - Railtrack . . .
It is a large document - the section dealing specifically with super-elevation starts on page 23. It uses "Super-elevation" as standard with (cant) in brackets to keep the old guard in touch!
If you have the time and interest, iit makes a fascinating and highly informative read, very well illustrated with clear diagrams throughout. It touches on many other subjects that come up on the forum apart from this one.
I found it particularly interesting that "turnout" is adopted as the unambiguous term for what have variously been called points and switches in the past.
Not before time!