Perth Freight Link = $1.6bn

Is anyone else stumped as to why it costs so much to build roads? This is 13.4kms at a cost of $1.6bn... do I understand that correctly? Presumably they are diamond encrusting the surface to make it long lasting

http://ift.tt/1Iw77Xs

From memory the entire Perth/Mandurah rail line was only $1bn?

Perth Freight Link = $1.6bn