Quote:
Originally Posted by hammersklavier
Also line speed isn't on the vehicles
|
Their max speed is something like 65 mph.
Quote:
Keep in mind here that Chicago, Boston, DC/Baltimore, LA, San Francisco, Seattle, Montréal, Toronto, and Vancouver all have commuter rail lines that share ROW with freight mainlines.
|
Right, it isn't impossible in general. It is just that in Pittsburgh, there are no important lines the freight operators are willing to share, and building more lines isn't feasible for all the usual reasons around here.
Quote:
Most mass transit riders are relatively poorer
|
And ride the bus.
My point was specific to commuter rail.
Quote:
but the best way to do so is to provide mass transit options that the people who usually control the purse strings want to ride.
|
So you spend $10-$15 per rider subsidizing a lightly used commuter rail line, with most of those riders being higher income. What exactly does this accomplish? Is your idea those few higher-income riders will now vote to also increase bus funding, and by more than the subsidies we diverted to use on them, and that there will be enough of them to make that a policy?
You'd need to be getting a LOT of riders for that to even be plausible, and if you were getting that many riders we wouldn't need such big subsidies.
Quote:
which in turn makes them more disposed to funding mass transit in general
|
Again, a couple thousand higher-income people in Allegheny County get subsidized commuter rail. Your theory is this small amount of people will now have the will and political clout to vote for more funding for PAT buses that actually go where poorer people live?
Quote:
Honestly, I'm not in love with your model. Suburban transit works best not with a high average density but rather a high nodal density, meaning that the population naturally clusters around suburban nodes.
|
That's exactly what WEIGHTED average density, rather than regular average density, attempts to represent mathematically. If everyone is clustered in dense nodes, you will get a high weighted average density. If there are more low-density smears and fewer such high density nodes, you will get a lower weighted average density.
Quote:
Pittsburgh would punch above its weight in terms of nodal density
|
I really doubt it based on the statistics I have seen and what I am about to discuss. But if you have actual empirical evidence of that, feel free to show it.
Quote:
because the nodes of nodal density are artifacts of prewar development patterns, which Pittsburgh and environs have quite a lot of.
|
The Pittsburgh MSA has more people living in postwar developments than many people seem to understand, due to shifting population patterns. Basically, most of the prewar developments started rapidly depopulating while other parts of the MSA were still growing. And many are still growing--see Cranberry, Peters, and so on.
So there used to be a rail service up through towns like Valenica and Mars. But these days far more people live in Cranberry.
Quote:
The metro's mill towns and old railroad suburbs contribute to an elevated nodal density
|
Again, you are largely talking about areas which have experienced mass depopulation postwar.
You mentioned Brownsville, for example. Its population peaked at about 8000 in 1940, and in 2010 was down to 2300.
You also mentioned Charleroi--peaked at about 11,500 in 1920, down to 4100 in 2010.
You can go right down the list.
Meanwhile, I mentioned Cranberry. Only about 3600 in 1960, over 28,000 in 2010, likely well over 31,000 in 2020.
Peters was about 3000 in 1950, 21,000 in 2010. And so on.
Again, I really don't LIKE any of this. But the postwar rapid depopulation of these communities you are talking about combined with the autocentric development in the communities I am talking about is precisely why our average weighted density is so low. And I am pretty sure if you ran the actual numbers, so would be what you are calling nodal density, because you are mostly thinking of nodes that have experienced mass depopulation.
And the cost of continually trying to ram a square peg into a round hole is we won't get funding for a square peg. Cities with actual square holes will get it instead.