Quote:
Originally Posted by Sir.Humphrey.Appleby
Well, does the O'Train really have any signalling other than the two controlled switches? Basic fixed block for the two parts?
|
It's the "O-Train", not the "O'Train". It's not Irish.
The line has interlocking at the diamonds as well.
Quote:
|
The O'Train also doesn't have substations (which I assume is going in the costs above).
|
I was using it as an example of what it costs to lay rail, and, by extension, how high the cost appears to be given that what is left (electrical) can't possibly make up the difference.
Quote:
|
The $540 million dollar cost for transitway conversion also seems to include stations, new elevated, at grade and below grade alignment where they found the transitway alignment lacking.
|
Correct:
http://ottawa.ca/residents/public_consult/transit_tunnel/op_3/costs_en.html
What you'll notice from the above is that the station costs average $40M (for 9 stations). There is also, coincidentally, about 9 km of transitway being converted (i.e. one station per km), so the $540M total conveniently divides out to $20M/km excluding stations or $60M/km including stations. These costs include "engineering, management and contingency".
Just to refresh everyone's memory, the costs from the April 2008 TMP background document are as follows (M$/km):
- 2.43 Track (rail, ties, ballast)
- 1.35 Power
- 1.00 Power supply
- 1.20 Substations
- 1.50 Control/signals
- 0.75 Communications
- 8.23 Total
There were also items like temporary asphalt and asphalt removal (each on the order of $300k/km), but these seem to have been done away with in the recommended plan. On top of this was 15% engineering/design and on top of that 30% contingency, which tops out at $12.3M/km combined. We've gone from that to $20M/km in less than two years, and all this apparent inflation (50+%) in a period of negligible economy-wide inflation. Indeed, the bids for Calgary's West LRT during the same period have come in below what was estimated due to reductions in labour and material costs.
It's also rather odd to think that there should be much in the way of need for engineering or even contingency for the sections between stations: the Transitway was already engineered when it was built; it doesn't get a lot simpler than putting down track on an existing roadbed.
Quote:
|
The higher costs for the conversion could likely have been avoided by instead changing the specs for the vehicles for tighter curves and more gradient. If Toronto's streetcars can be designed for 8% grades (and hauling dead cars up out of 8% grades) and making standard street length turns then so could Ottawas rapid transit LRT be designed for whatever the original transitway was deisnged for. Reducing train length might have prevented rebuilds in a couple places too (maybe the bridges at train could have been retained) since requiring 180m of straight track plus safety approaches reserved really doesn't help much in fitting into existing geometery.
|
The Transitway is designed as if it is a highway for at least 80 km/h running speeds with gradients less than 3.5%. It's supposed to be "metro-ready". It's already a "fact on the ground" whose built parameters far exceed any vehicle requirements so vehicle specs don't really enter into it. Only at Train does the requirement of 180 m of straight track have an effect and it's not even the most expensive of the station reconstructions.
There really is no easy way to explain the increase in the costs for the actual conversion; the stations are somewhat easier - a combination of initial low-balling and much more complex than originally-envisioned stations.