Re: [NSW] Cityrail Grades

["Andy B" <and_b@dingoblue.net.au>]

"Chris Downs" <cvdowns@ozemail.com.au> wrote in message
phYI4.3882$5D.7926@ozemail.com.au">news:phYI4.3882$5D.7926@ozemail.com.au...
> I'll take largest to mean steepest (not in degrees or %, sorry):
>
> On passenger lines:
> 1 in 30 compensated - Wynyard to Harbour Bridge
> 1 in 31 or 32 in spots on ESR?? (not in my grade book)
> 1 in 31, 32 & 33 Blue Mountains many stints between Valley Heights and


Can someone please explain what this 1 in 30 or 1 in 31 etc means?   From
what I understand it means how steep the line may be in a particular
section, but that's about it.


Andy B