Live data from Hacker News

Suburban Ride-Sharing Is Mathematically Unlikely

citylab.com

41–50 of 70 posts

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#41
post #8

Here's a super depressing mathematical proof of why the services fail in the burbs: First the assumption is a car is necessary for living in general. I am very happy for the 0.1% of the population who live in an urban hugbox where they don't need a car, but this is a general argument for 99% of the population or a unicorn sized middleman app. My garage costs perhaps $50K lifetime, including land, maint, all added tog…

The 30,000+ dead and 2 million injured a year in the US alone question your contention that car commuting is 'nearly perfectly safe'.

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#42

It seems that the conclusion is drawn from specific premises: + The measure of a ride sharing app's value is cash on cash returns to Silcon Valley style investors. + A ride sharing app's primary market will be in the US. + The suburbs served will be affluent, and hence the ride sharing app's user base will tend to have economic flexibility in regards to transportation. + The served markets will have poor public trans…

The numbers in this article are misleading as they're drawn from ridiculously underestimated assumptions. 25 - 33% is a more accurate number. Pooled ridesharing is cheaper and better than owning a car in many cases (including mine), and the benefits will only increase with the network effect. (Imagine if 50% of the cars on the road are Ubers, and the average ETA to pickup is 30 seconds). The positive externalities ar…

where do you live?

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#43
post #16

Earlier quoted context omitted.

In Europe, the number of people willing to use public transit is much greater than 10%, for one thing. Another thing is that you don't really need to get matched with someone going the same direction as you: people generally value living close to public transit (which is completely opposite to people living in California, who try to avoid it), and public transit generally gets you where you want to be, possibly with…

The prices in the Mission or downtown Palo Alto, for example, don't really reflect your contention that people in California don't want to live near public transit. The real issue is that California isn't building much new transit, and it's essentially impossible to build much new housing or corporate headquarters nearby— so it's mathematically impossible for many people to live near public transit.

In general, rail projects are considered to increase property values. In fact, I've read the argument that light rail isn't really cost effective vs. dedicated bus lanes but the commitment associated with a rail line makes often makes it preferable for planning purposes. (In that buses, in addition to having a lower-class image, can always have their routes altered so--the argument goes--people won't make property decisions based on bus lines.)

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#44

It seems that the conclusion is drawn from specific premises: + The measure of a ride sharing app's value is cash on cash returns to Silcon Valley style investors. + A ride sharing app's primary market will be in the US. + The suburbs served will be affluent, and hence the ride sharing app's user base will tend to have economic flexibility in regards to transportation. + The served markets will have poor public trans…

The numbers in this article are misleading as they're drawn from ridiculously underestimated assumptions. 25 - 33% is a more accurate number. Pooled ridesharing is cheaper and better than owning a car in many cases (including mine), and the benefits will only increase with the network effect. (Imagine if 50% of the cars on the road are Ubers, and the average ETA to pickup is 30 seconds). The positive externalities ar…

The numbers in this article are misleading as they're drawn from ridiculously underestimated assumptions. 25 - 33% is a more accurate number.

Why do you think your guess is more accurate?

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#45

It seems that the conclusion is drawn from specific premises: + The measure of a ride sharing app's value is cash on cash returns to Silcon Valley style investors. + A ride sharing app's primary market will be in the US. + The suburbs served will be affluent, and hence the ride sharing app's user base will tend to have economic flexibility in regards to transportation. + The served markets will have poor public trans…

The numbers in this article are misleading as they're drawn from ridiculously underestimated assumptions. 25 - 33% is a more accurate number. Pooled ridesharing is cheaper and better than owning a car in many cases (including mine), and the benefits will only increase with the network effect. (Imagine if 50% of the cars on the road are Ubers, and the average ETA to pickup is 30 seconds). The positive externalities ar…

If a person calls for an Uber and rides alone, there's no less congestion because there is no reduction in commuter-vehicle trips. Just an increase in raw vehicle occupancy. In addition, unless the Uber is already in the commuter's driveway and waits at the curb until the commuter is ready to leave and parks in the commuter's driveway overnight, the use of an Uber increases traffic overall.

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#46

Earlier quoted context omitted.

0.1% really? I live in Pittsburgh, Pennsylvania. 25% of households here have no car, and we don't have the world's best transit system. Per http://blogs.wsj.com/economics/2014/01/21/vital-signs-more-h... it's over 9% of households that don't have a car- and of course the average size of a household is above 1, so your fake statistic is two orders of magnitude off from reality. You're welcome to be hyperbolic, but esp…

Isn't this article about suburban ride-sharing? Car ownership in the suburbs is 100%. I don't think anyone disputes that a lot of people live in cities and don't own cars.

I live in a suburb of Austin and I would wager the ratio of cars to adults is pretty much 1. There are quite a few homes with two adults and three or more vehicles. My home is like this (I have a car and a motorcycle).

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#47
post #34

Earlier quoted context omitted.

I have to confess that while I absolutely understand not owning a car as an adult under some circumstances--and in some cities especially--the concept of never learning to drive and get a driver's license somewhat astounds me. There are so many places I go both locally and when I travel that would be effectively inaccessible without a car. And even leaving my regular commute aside, there are plenty of times when I ne…

It's not that difficult— if such a person travels travel, they go to major cities or resorts or places where driving isn't necessary, and if they want to go hiking, etc., they take public transit or go with friends. Downtown-oriented companies (e.g. startups or banks) often do business with other urban companies, too. Versus oft-suburban companies (e.g hardware companies.) often do business with other oft-suburban co…

Sure. Someone just out of school working for some urban startup with a circle of friends (at least some of whom own cars) who also live in a relatively dense city with decent public transportation can often get away without driving for a while. They're probably not going on a lot of sales calls, they can carpool with their urban friends to go hiking or to help them move, and they can just choose not to vacation in areas that require a car (the vast bulk of the US) unless they're going with someone who can drive.

However, some of those friends will probably move out to the suburbs or exurbs, there may be interesting job offers that aren't conveniently reached by public transit, or it may just get tiresome to always be depending on others to go skiing or to the beach.

It's obviously a lifestyle choice people can make--and it's more practical in a handful of very dense cities--but it is something that they're likely to find very limiting over time.

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#48
post #2

Where I live, commuter trains are packed, though (Europe). How can that be? The same logic should apply to commuter trains as to cars?

In addition to the other comments, a lot of people also drive (or get dropped off) at commuter rail stations. And, in many cases, they take transit upon arrival in the city to get to their destination. So commuter rail is really a modified point-to-point for most people in the US.

Commuter rail also usually doesn't work for suburban-to-suburban commutes. It's almost entirely a hub and spoke model with the hub being an urban core.

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#49

Earlier quoted context omitted.

The numbers in this article are misleading as they're drawn from ridiculously underestimated assumptions. 25 - 33% is a more accurate number. Pooled ridesharing is cheaper and better than owning a car in many cases (including mine), and the benefits will only increase with the network effect. (Imagine if 50% of the cars on the road are Ubers, and the average ETA to pickup is 30 seconds). The positive externalities ar…

If a person calls for an Uber and rides alone, there's no less congestion because there is no reduction in commuter-vehicle trips. Just an increase in raw vehicle occupancy. In addition, unless the Uber is already in the commuter's driveway and waits at the curb until the commuter is ready to leave and parks in the commuter's driveway overnight, the use of an Uber increases traffic overall.

The previous person was talking about pooled ridesharing. In my case car pooling was only convenient when going to work. It was much harder to coordinate the afternoon/evening trip home. Services like Uber make it a lot easier for 3-4 people to carpool one way and then use different methods to get home.

Re: Suburban Ride-Sharing Is Mathematically Unlikely

#50
Hush. You're ruining my discount with math the companies should have done already. (=

I'm getting discounts on all my rides from home by using the carpool feature. In the last 3 months, I have had 0 people opt to share a ride with me from my house to downtown Austin. I'm 8 miles away from the city center.

Post reply on HN