Re: Crossing loop design (r.e. Southern Aurora crash)

[cmgord@ecr.mu.oz.au (Christopher_Martin GORDON)]

:  In Vic generally Autos (permisssives) are numbered with a 1, 2 or 3
: letter prefix for the line and a number which corresponds to the
: signals location in hundreds of feet from Flinders street. (EG ES 9974
: is on the Essendon Standard gauge (NE) and is 997400 feet from
: Flinders Street. Homes are numbered according to the box controlling
: them and with CTC they have a station code prefix (EG CLT/2 is the
: down home arrival for Chiltern Loop).

In Victoria autos ahave stagered lights (with semaphores the bottom 
spectial is different so that the light is on the right of the post, 
expect where there is ared marker light.)

Autos are numberd like above letter(s) and number, odd is up and even 
down.  In newer numbering autos have the station code and a number,
if the number's first digit is even, like 0,2,4,6,8 then it is just
an auto, but if the first digit is odd 1,3,5,7,9 then the auto is 
controled, like for level crossings. and if the last digit is odd then
down and if even then up (different to old style numbering)

Homes have lights in a vertical line and never have a marker light, 
usually fitted with a third light to show, red over red over yellow
homes are numbered by the lever number ie 65 or the new system with
the station code and three digits always starting with 1,3,5,7,9
some homes are fitted with an 'A' light and when red over red and 'A'
is displaied then it can be treated as an automatic signal.

Examples
Autos:
L665   D319   BLY272   BLY352 (controled auto)

Homes:
65   4   BLY302   BLY305

For new numbering:
first digit is
0 or 1, Clifton Hill group
2 or 3, Burnley Group
4 or 5, North Melbourne Group
6 or 7, Caufield Gorup
8 or 9, Special (incuding Sandringham)

Numbering at Flinders Street and city loop is the same as this
expect that there is no station code.

P.S. I got it wrong above
OLD SYSTEM: odd is down, even is up
NEW SYSTEM: even is down, odd is up


I hope i haven't confused you too much,

--
Chris Gordon
http://www.ecr.mu.oz.au/~cmgord