New South Wales
Railway signals in New South Wales broadly follow British route signalling practice, with certain American influences and local innovations. The following systems are currently in use, listed in chronological order of introduction: two-position lower quadrant semaphore, three-position upper quadrant semaphore, Double Light Colour Light and Single Light Colour Light.
Double Light signals are capable of showing more indications than Single Light signals, therefore Double Light signals are more appropriate for use in dense traffic areas, such as the Sydney metropolitan area, and Single Light signals for the less intense areas. However combinations of the different types may be found at the same interlocking locations.
Read more about this topic: Australian Railway Signalling
Famous quotes containing the words south and/or wales:
“A friend and I flew south with our children. During the week we spent together I took off my shoes, let down my hair, took apart my psyche, cleaned the pieces, and put them together again in much improved condition. I feel like a car that’s just had a tune-up. Only another woman could have acted as the mechanic.”
—Anna Quindlen (20th century)
“I just come and talk to the plants, really—very important to talk to them, they respond I find.”
—Charles, Prince Of Wales (b. 1948)