This crossing situation is a total fiasco.... in Wellington, they build raised crossing using bitumen that last only 10 years but also cost only $40,000 each. AT build raised concrete ones which they say will last forty years but which cost $400,000 each.
If the price was to rise by 50% every ten years when Wellington had to replace theirs, that would still lead to a total cost of just over $250,000 or a saving of $150,000 over what AT would have to pay. Considering what AT have already built (12) and are still to build 17 more, that's over $2.5 mil wasted in the next forty years.