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zamadatixyesterday at 11:23 PM1 replyview on HN

I'm not sure money and time are cleanly separable metrics for this in that changing one changes the other, which is why it's not as simple as looking at the toll roads' dynamics in isolation. If a region spends more on transport infrastructure then the average transit time is going to be less (and conversely the opposite) for pretty much any method of buildout except fraud. The notion of "everyone now bears the cost of the road" causes the roads to be optimized towards the average public good. This is not to say it's without tradeoff to anybody at all - just that it's geared towards the best tradeoff for everyone as a whole. The notion of "those able to bear the cost and extra overhead of the toll road bear its cost" certainly still causes a reduction in time for those willing and able to pay, but only for the able who now have no interest in their public infrastructure funding duplicating a path they already have for the common good.

That's where the shift in burden to the poor so the rest can have shorter commute comes from. If everyone had the same opportunity cost to use the toll road then it wouldn't have the shift in burden as much as a pure shift in utility. Of course it doesn't have the same opportunity cost, so who benefits from the toll road is more slanted than who benefits from the public road. Whether or not the shift of burden is acceptable/ideal is a matter of opinion on public policy, but it's there.


Replies

kcplatetoday at 1:39 AM

> I'm not sure money and time are cleanly separable metrics for this in that changing one changes the other, which is why it's not as simple as looking at the toll roads' dynamics in isolation

Sure they are, tolls regulate the amount of traffic on a toll road and should hopefully decrease congestion and improve travel time. Eliminate the tolls, you will gain more traffic, more congestion, and more travel time. This will diminish its utility in that regard and it becomes yet another congested path.

> If everyone had the same opportunity cost to use the toll road then it wouldn't have the shift in burden as much as a pure shift in utility

Not that sure that a Marxist-style “equity” argument is all that convincing here. There is no huge mass public benefit here in eliminating an existing toll road. Your only true benefliciaries of this change are those people 1) who have to go from point A to point B, 2) need to arrive somewhat sooner than they do now (and can’t leave any sooner to get there) and 3) cannot afford the toll to get there faster under any circumstance.

Seems like that’s a pretty small subset of folks. Everybody else probably falls into 2 basic categories. Those willing to pay the toll to get there sooner—-but they lose the time benefit in your world. Those not willing to pay to get there sooner—but they now get the privilege for paying for a road they were choosing to not pay for before. Seems to me the bulk of the affected, lose.

Bear in mind, I am only arguing against the elimination of existing toll roads. Public infrastructure needs are what they are and region planners should make best efforts to deliver reliable and reasonable road infrastructure for its population. However, there is no doubt that toll roads can help improve overall transportation needs. So if a beneficial road can be created sooner if its costs can be offset via toll vs. waiting until public money is available to fund the construction, I think there is value to be explored there.