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Transportation

New Study Finds Ridesharing Actually Increases Pollution, Congestion (nytimes.com) 187

Greg Bensinger of the New York Times editorial board argues ridesharing companies haven't delivered on their promises of well-paying driver jobs with less traffic congestion (let alone their predictions of an end to car ownership — or even of a sustainable, profitable, business model).

And he adds that now a new study "is punching a hole in another of Uber and Lyft's promised benefits: curtailing pollution." The companies have long insisted their services are a boon to the environment in part because they reduce the need for short trips, can pool riders heading in roughly the same direction and cut unnecessary miles by, for instance, eliminating the need to look for street parking. It turns out that Uber rides do spare the air from the high amount of pollutants emitted from starting up a cold vehicle, when it is operating less efficiently, researchers from Carnegie Mellon University found. But that gain is wiped out by the need for drivers to circle around waiting for or fetching their next passenger, known as deadheading. Deadheading, Lyft and Uber estimated in 2019, is equal to about 40 percent of rideshare miles driven in six American cities.

The researchers at Carnegie Mellon estimated that driving without a passenger leads to a roughly 20 percent overall increase in fuel consumption and greenhouse gas emissions compared with trips made by personal vehicles.

The researchers also found that switching from a private car to on-demand rides, like an Uber or Lyft, increased the external costs of a typical trip by 30 percent to 35 percent, or roughly 35 cents on average, because of the added congestion, collisions and noise from ridesharing services. "This burden is not carried by the individual user, but rather impacts the surrounding community," reads a summary of the research conducted by Jacob Ward, Jeremy Michalek and Constantine Samaras. "Society as a whole currently shoulders these external costs in the form of increased mortality risks, damage to vehicles and infrastructure, climate impacts and increased traffic congestion."

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New Study Finds Ridesharing Actually Increases Pollution, Congestion

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  • Duh (Score:5, Insightful)

    by Valgrus Thunderaxe ( 8769977 ) on Sunday October 17, 2021 @03:40PM (#61901133)
    A bunch of cars that would be otherwise be parked are now idling and crawling in circles around city blocks.
    • Re:Duh (Score:5, Insightful)

      by Sique ( 173459 ) on Sunday October 17, 2021 @04:29PM (#61901261) Homepage
      Not only this, but a bunch of trips via car are done which would otherwise have happened.

      As soon as you are making it less costly and less cumbersome to have a trip, you increase the number of trips. People will go out for longer and party longer, because they can always hail a trip via ride sharing companies and don't have to pay a premium for a taxi service. People who would otherwise used a bus or a train are now using a ride sharing company, because it's providing door to door service. Everything increases the pollution and the traffic congestion, if it makes it easier to ride a car.

    • by dohzer ( 867770 )

      But sharing is caring. How could this lead to bad things coming true?

    • by kwandar ( 733439 )
      Yeah, but I sold my car (SUV) as a result of better transit options, and won't be buying another. I don't see that they factor in, over a longer term, fewer cars need to be made/sold/supported as a result. It isn't just the driving - it is also the manufacturing/sales components that drive up carbon.
      • You are purchasing a portion of a car, one ride at a time. Presumably, if you didn't create demand for a car through your purchase of rides, then some provider wouldn't have bought a car to sell you that service. If your goal is to reduce pollution, walk or ride a bike.
      • by sjames ( 1099 )

        Your transportation still puts wear and tear on a car, you just don't own it. But now, instead of a round trip being your car going from your home to the destination and then back, it's from wherever the car is to your home then to your destination, then from wherever to your destination then back to your home. The result is a net increase in miles the car travels to shuttle you back and forth.

        Can we finally state it plainly that the odds that you just happen to find an Uber driver who was actually near you

    • Re:Duh (Score:5, Insightful)

      by LostMyAccount ( 5587552 ) on Monday October 18, 2021 @07:56AM (#61902507)

      I wonder how much of this is just political fallout from the cities, which often fought Uber tooth and nail to benefit their lucrative taxi monopolies.

      Cities *could* adapt to Uber, creating places for drivers to wait without idling or driving around. They could probably even justify sacrificing some public parking for this purpose.

      But this would involve some level of backtracking by cities on their political spin. And many of the cities are also run by progressives who think public transit is some kind of reasonable alternative and who also switched to attacking ridesharing from a pro-labor perspective when the taxi monopolies collapsed.

      There's lots of reasons to dump on ridesharing, whether its their ridiculously utopian promises or their sketchy policies, but acting like cities were just innocent victims is crazy.

      Public transit is a useless substitute outside of a small number of cities, and even where its a slightly plausible alternative, the same progressives looking to ban cars are also unwilling to clean up their public transit systems, allowing them to be rolling homeless shelters and filled with predators. It's not just inefficient, its dangerous and anyone who could pay for rideshare will, it's vastly more convenient and much safer.

  • by quonset ( 4839537 ) on Sunday October 17, 2021 @03:41PM (#61901137)

    But that gain is wiped out by the need for drivers to circle around waiting for or fetching their next passenger, known as deadheading.

    If you're driving around looking for a passenger, you're not "ride sharing". If you're fetching your next passenger, again, you're not "ride sharing". You're a taxi company.

    Ride sharing is when you are already going to a particular destination and take someone with you who happened to be going to the same location.

    • Not getting at you really, but was there actually anyone that believed they weren't a taxi company? I just figured anyone mentioning that was a shill/had an agenda.

      • Not getting at you really, but was there actually anyone that believed they weren't a taxi company? I just figured anyone mentioning that was a shill/had an agenda.

        That was the literal interpretation both Uber and Lyft touted their companies as. In fact, this is from Uber's own site [uber.com] while this is what Lyft has to say [lyft.com] from their own site. Further, when you look at articles about the two companies, the only words used are ride sharing companies. Not taxi companies.

        Apparently all those writers are shills for the companies.

    • Yep, this. (Score:4, Informative)

      by rsilvergun ( 571051 ) on Sunday October 17, 2021 @04:37PM (#61901305)
      The trouble with Ridesharing is that once somebody drops you off you still need to get home. And most people need to do it on a strict time limit for work/school/pick up kids, etc.
    • by PPH ( 736903 )

      If you're driving around looking for a passenger, you're not "ride sharing".

      This.

      If the first question on the driver's app isn't "Where are you going and when?" it's not ride sharing.

      Years ago, New York City was faced with on-line cab hailing apps. And they fought against them (probably at the behest of radio dispatched taxi companies). As leaders in the cab regulation biz, they could have been proactive about incorporating Uber/Lyft type apps into its regulatory domain and using the above distinction to exempt true ride sharing.

  • by NotEmmanuelGoldstein ( 6423622 ) on Sunday October 17, 2021 @03:54PM (#61901173)

    ... greenhouse gas emissions ...

    If only there was a vehicle that didn't use an Internal Combustion Engine but electricity. If only the government demanded business vehicles must soon be these new-fangled electric vehicles.

    This is a environment and health problem we do have the technology to fix. We just need the political will, which some states and countries are slowly gaining.

    • If you shift to all EVs you just shift the pollution problem to tires. Better to implement PRT in cities and then gradually spread it out to cover larger areas.

      • PRT is never PRT. They always build it to even out costs by trying to always take more than 1 person (not personal) and making you wait (not rapid).

        The only way to have true PRT is vast amounts of overprovisioning, say like 2 cars for every individual transported at peak times. There should almost always be a car waiting at a stop.

    • If only there was a vehicle that didn't use an Internal Combustion Engine but electricity. If only the government demanded business vehicles must soon be these new-fangled electric vehicles.

      Not too soon though.

      https://www.washingtonpost.com... [washingtonpost.com]

    • Because electricity comes out of the wall by magic. It is not created by burning coal. The City Folk can feel all clean and green, because the pollution happens out in the sticks. The good fairies take the Lithium away when the batteries die too. Elon tells me so.
  • Also, don't eat egg yolks and for God's sake don't use ANY salt!
  • by Retired Chemist ( 5039029 ) on Sunday October 17, 2021 @05:11PM (#61901405)
    Uber and Lyft despite all the hype are nothing but taxi companies where the drivers provide their own vehicles and don't get paid well. There is no real difference between calling them and calling a commercial taxi company, except with the taxi company you have someone to complain to if the service is bad. They are trying to drive the old style taxi companies out of business by pricing at a loss, which is why they loose so much money. All of their hype is just words. If you want to decrease pollution go to electric taxis.
    • by Mitreya ( 579078 )

      There is no real difference between calling them and calling a commercial taxi company, except with the taxi company you have someone to complain to if the service is bad.

      I agree with the rest of your post, but this part is exactly the opposite.
      The difference is that with Uber/Lyft, is 1) you know exactly who your driver was, 2) there is record of the route they took (in case the driver was taking the long path), 3) you know you'll be able to pay with a credit card. And these days 4) there is also an immediate cost estimate before you take the ride.

  • by GuB-42 ( 2483988 ) on Sunday October 17, 2021 @05:45PM (#61901497)

    It is a taxi service, you share nothing, the driver drives just for you, for no other reason than money.
    Real ridesharing involves getting people together in the same car. Maybe the driver is someone who wants to gets to a destination and takes passengers along the way, or independent people who share a taxi, but calling Uber "ridesharing" is misleading. The confusion probably helped them get a "greener" image.
    Of course, when a car has to pick you up, it will increase traffic.

  • by Ichijo ( 607641 ) on Sunday October 17, 2021 @06:20PM (#61901547) Journal

    Why would someone "choose" to rideshare, when the alternative is driving?

    Maybe parking is scarce at your destination, and so people are more likely to bike there, or take public transportation, than to drive themselves. In this case, there's an environmental benefit to ridesharing that isn't reflected in the study.

    So in what situations would a normal person who, given the choice, chooses to rideshare, and it doesn't benefit the environment?

    • Uber or Lyft don't care about parking. They're going to just drop you off wherever they can pause for a minute to let you out.

      So ridesharing make the situation worse in your scenario, not better. Because the parking problem was solved by not having anyone park, and adding a deadhead trip to you an another deadhead to their next fare.

    • ... who won't or can't drive and there is no reasonable journey available via public transport. Then taxi (which is all Uber is) is really your only option other than cycle or walk, which arn't really options if its more than a few miles and/or its pissing down with rain.

    • Maybe parking is scarce at your destination, and so people are more likely to bike there, or take public transportation, than to drive themselves. In this case, there's an environmental benefit to ridesharing that isn't reflected in the study.

      Actually it's been quite the opposite. We've already found prior studies https://www.bloomberg.com/news... [bloomberg.com] which show that where driving is difficult Uber doesn't form an alternative to driving, but rather cannibalises existing public transport or biking, making them again a part of the problem and not part of the solution.

      • Do not blame ride sharing for public transits miss management, ride sharing developed in a space left open by city planners. In 2017 urban centers were already cutting back late night service and getting to distant locations because of the costs of the employees running a full 24/7/365 operation. Now better than a third have been offered a work from home option the economics of publc transport are such the Service Level and the stops all have to be rearranged. Being urban centers, and government run,
        • Do not blame ride sharing for public transits miss management

          It's okay when women are managers.

          ride sharing developed in a space left open by city planners

          What? You're mixing definitions of "space" here.

          Now better than a third have been offered a work from home option the economics of publc transport are such the Service Level and the stops all have to be rearranged. Being urban centers, and government run, this is unlikely to happen.

          It will happen, but in a less than timely fashion, because bureaucracy. However, corporations are no solution to this; if you let them take charge, they create just as much needless process to justify their existence.

      • by Ichijo ( 607641 )

        We've already found prior studies which show that where driving is difficult Uber doesn't form an alternative to driving

        Ok so we agree then that this study is flawed because it compares ridesharing with trips made by personal vehicles.

        So then the next question is whether ridesharing reduces public transit ridership as your study claims (does correlation imply causation?) and, if so, how transit agencies can bring those riders back.

    • People who are just flying into town. The "Ride share" is cheaper than a taxi or renting a car for the day. Not cleaner just cheaper.
  • They waste and burn fuel just getting to you and then when they aren't transporting anyone, more fuel than a personal car - check.

    They add cars and congestion to the roads as they are getting to you and moving waiting for their next fair, on the road more than a personal car - check.

    Sounds like they are as bad as bitcoin miners to me, they belong in the same hole at the bottom of the ocean.
  • by Bigbutt ( 65939 ) on Sunday October 17, 2021 @08:41PM (#61901697) Homepage Journal

    Back when I lived in Virginia, people would pick up ‘slugs’ if they had to drive into DC. They were trying to avoid the heavy congestion so picking up extra passengers in order to take advantage of HOV restrictions was how it worked. There were slug lines in DC as well. For all I know, they’re still there.

    The idea here with Lyft and Uber would be that if you were going to WalMart to go shopping, someone would ping the app and say they needed to go to Sams club a couple of blocks away. They’d give you five bucks and you go a couple of blocks out of your way to pick them up and drop them off, then go shopping at WalMart.

    When you’re ready to go home, you’d flag your availability in the app; from WalMart to 1st Street and maybe a different someone would be at Sams club, you’d get them, drive a few blocks in a different way, then head home with 10 extra bucks in your pocket having driven maybe 4 or 5 extra blocks.

    For the ride out, if no one was available you’d just take your car. For the ride back, that might be more of an issue and you may need to actually call a Taxi if no one was nearby or available.

    [John]

    • Okay, but that's not how Uber and Lyft operate. They operate like any taxi service, where people are either driving around or sitting around waiting for a fare. Then they go collect and deliver them and there's typically no benefit because they have to drive to where they are, then to where they want to go.

    • The other reason they're called slug rides is you just slug the driver and take his wallet.

  • I think ride sharing has established itself. Earlier, they had to fight simply to exist.

    Now, it is time to optimize. Give ride share access to holding areas. Switch to electric. Limit vehicle size.

    Oh... Dump the drivers.

    Maybe running the studies in Oslo, Norway would make more sense.
    • One thing I think the article missed was the production cost and impact of using a single vehicle almost daily until mileage death. With a bit of knowlege and asking some uber drivers they are leasing or keeping their cars until 120,000 miles and running them at least 5 days a week. Not a single one of these vehicles rots in driveway after that time frame with the residual values of cars at that point. At least while these are under uber service the carbon footprint of production shrinks per mile dail
  • Any sufficiently popular ridesharing service is indistinguishable from a taxi service.
  • Ofcourse it does, just like with taxi's. Instead of just going from your door to your destination, the rideshare/taxi has to drive from its previous customer to you, then to your destination aand then back to another customer and later in the day drive to your destination and drive you home and back to another customer.. Those are more movements as if you would take your own car.

  • CO_2 is not pollution. Anyway, who cares? If people are willing to pay the price, and people are willing to provide the service, a need is being fulfilled with all involved parties happy about the result. If you don't like it, move to a dictatorship, don't try to make this place into one.

  • If we switched to autonomous vehicles which would then mow down kids and pets, we could reduce the emissions, but because we charge rent for parking, they optimize by not parking.

    Pro tip: rideshare e-bicycles, e-scooters, and e-skateboards have much lower carbon footprints.

The unfacts, did we have them, are too imprecisely few to warrant our certitude.

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