Edited 11 Jul 2015 19:13, 6 years ago, edited by RTT_Rules

I believe all passenger rail in Sydney in the distant future will be single deck metro due to the value of surface land, NIMBYS, automated tunnelling and the extra cost of making and using a DD tunnel.

People would not bother getting off a metro to get on any high speed train to Parramatta to save 10 minutes but would rather stay on a non stop metro.

It has been agreed on here that express trains should not share lines with turn up and go all stoppers.

Most people believe an underground station would cost about $500m

The NWRL only cost $1.15b for 15km of tunnels http://www.transport.nsw.gov.au/media-releases/tunnelling-contract-north-west-rail-link so I cannot see how Parramatta to Central would cost more than $2b particularly as it could just branch off the metro line at Central so only needing one station at Parramatta.

I did some googling on compartive costs around the world and while station costs are rarely individualized, stations are typically listed around $150 to $300m and construction costs are $300 to 400m per km including stations. The Melbourne Metro project lists all the stations at $1B.

What does the $1.2B get you in the tunnel, just a hole, lined, full infrastructure? Where is the rest being spent? Compared to other tunnel based rail projects, ie Brisbane CRR, Melbourne Metro and Sydney City Metro its no where near enough. Additionally the stations also provide something that would need to be built anyway, emergency exits, ventilation etc.

Gothard Base Tunnel is $10B (2010) for 57km and not built in the middle of a city. Just halving for distance and allowing for inflation, that's $6B.

The official estimate of the cost to build the Melbourne Metro rail tunnel is $9 billion but some advocates claim it’s only $3 billion. What explains the huge difference in these two claims?

[color=#669900][img]http://blogs.crikey.com.au/theurbanist/files/2013/10/BZE-cost-table-2.jpg[/img]
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