Can someone explain what this sign indicates please, found on the down slow 
at Grove Park: http://www.thebattens.me.uk/track.jpg. The '50' is one of a 
series of numbers at intervals before and after the main sign.

MaxB

On Sep 11, 8:31 pm, "Batman55"  wrote:
> Can someone explain what this sign indicates please, found on the
> down slow at Grove Park:http://www.thebattens.me.uk/track.jpg.
> The '50' is one of a series of numbers at intervals before and after the
> main sign.
>

'TL' is the transition curve length
'R' is the radius of the curve
'50' is the cant (height of outside rail above inside rail, in
millimetres)

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Railway Signs and Signals of Great Britain:
<http://www.railsigns.co.uk/>

Railsigns.co.uk wrote:
> On Sep 11, 8:31 pm, "Batman55"  wrote:
>> Can someone explain what this sign indicates please, found on the
>> down slow at Grove Park:http://www.thebattens.me.uk/track.jpg.
>> The '50' is one of a series of numbers at intervals before and after the
>> main sign.
>>
> 
> 'TL' is the transition curve length
> 'R' is the radius of the curve
> '50' is the cant (height of outside rail above inside rail, in
> millimetres)
> 

So the plate shows the point at which the track changes from a 
transition curve to a radius curve. Transition curves sit between 
adjacent radius curves (with different radii), and between a radius 
curve and a tangent (straight) section.