Crossover Replacement - Ruislip Siding

Will get heavily used during a two week shutdown between Ruislip and Uxbridge later in the year.

This thread should answer your questions

Concrete sleepers were used at Upminster scissor crossover and standard crossover with a new type of one piece frog. Could not add an image from flkr.

In all my years on the railway I never heard the term 'frog', I have only ever heard it used in connection with model railways and in that regard it has been familiar to me for more than 50 years. The 'frog' is more correctly called the 'crossing' which of course it is, i.e. one rail crossing another, and what the layman calls a crossing, i.e. one track crossing another, comprises four 'crossings'. A single crossover comprises two 'crossings' and a double crossover (AKA scissors crossover) comprises eight crossings.


Crossings are either solid castings or made up from two wing rails, point rail and closure rail. Manganese cast crossings have been around for a long time, there are plenty of them across the Underground network, so I'm wondering what is 'new' about the ones (eight I assume) at Upminster.

Thanks, I did wonder what I might be missing that was 'new', I assumed the points layout would use new point machines. I expect chairlocks are becoming rarer assets now as flat bottom rail has become the standard for replacement track and they were the only drawback to rerailing with flat bottom rail. Presumably the finance now exists to replace point equipment as and when needed and I expect that 6' foot layouts are also disappearing apace now.

Ok so you have the eight rail crossings as I mentioned but in this case there are two single cast crossings and two triple cast crossings. Even at the highest resolution it is difficult to see the detail to the triple crossings although they appear to be welded to the adjacent butted rails rather than fishplated except where track circuit blockjoints are required.