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ggreeryesterday at 9:49 PM4 repliesview on HN

In 2025, TriMet had 262 million passenger miles at a system cost of $812 million, for a cost of $3.09 per passenger mile.[1] Fares covered 7.8% of their costs. The other 92.2% came from payroll taxes and federal grants.

For comparison, a Lyft or Uber in the same area would cost you $1-2 per mile. Obviously it's not feasible for all 200k daily riders to take Uber/Lyft, and the Uber/Lyft cost doesn't include externalities like extra traffic, but TriMet is very expensive per passenger mile.

1. https://trimet.org/about/pdf/trimetridership.pdf


Replies

array_key_firstyesterday at 10:12 PM

This is an implementation problem, not a problem with the underlying concept.

Public transit like buses and lightrail are significantly more efficient per person than personal vehicles. This is because they can transport many more people for the same amount of space and energy. They also typically run on set tracks, which yields more efficiency gains.

The US is really, really bad at doing public transit. It doesn't help that everything is car centric, which makes public transit much harder.

For example, in your comment you're excluding road cost, but you're including the full system cost of transit. That's a car centric side effect, e.g. we take roads for granted. But the cost of cars also includes the cost of roads, the cost of land under those roads, the cost of parking, etc.

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shimmanyesterday at 10:55 PM

Oh wow I didn't know Uber solely relied on private roads, had their own DMV, or fleet of millions of cars; truly an innovative company that doesn't rely on public infrastructure!

danawyesterday at 10:15 PM

try it again while calculating infrastructure and road costs for 262mm uber/lyft rides

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rhubarbtreeyesterday at 10:46 PM

What about infrastructure costs for lyft and uber?

Perhaps it isn’t expensive once you consider the peak load and externalities. How many new roads would you have to build to do that?