It raises average vehicle occupancy, decreases the number of cars on the road and reduces car ownership, writes Yili Hon

Hong, Yili

LSE Research Online

10/6/2016Study shows that on-demand ride sharing mitigates trafficcongestionblogs.lse.ac.uk /businessreview/2016/10/06/study-shows-that-on-demand-ride-sharing-mitigates-traffic-congestion/110 Freeway @ Rush Hour , by Prayitno, under a CC-BY-2.0 licenceDigital platforms bring together buyers and sellers for transactions of various types. Such a platform economy hasbeen booming over the last few years. Years ago, we witnessed the success of traditional platforms (e.g., eBay andTaobao) that facilitate transactions of physical products. We call these “Platform Economy 1.0.” More recently, newplatform-based business models allow users to share almost anything, such as car rides (e.g., Uber and Lyft),unused room spaces (e.g., Airbnb and Couchsurfer), and even personal time (e.g., TaskRabbit, Postmates). We callthis “Platform 2.0,” or the “Sharing Economy.”The fundamental difference between the Sharing Economy and the Platform Economy 1.0 is the level of resourceallocation efficiency. A sharing economy platform leverages information technology to re-distribute unused or under-utilized assets to people who are willing to pay for the services, therefore increasing economic efficiency. Uber, forexample, has disrupted the traditional taxi industry; Airbnb has fundamentally affected the hotel industry. Thesecreative business models have also received venture capital funding worth many times their projected revenues.People on both Wall Street and Main Street are left wondering why these new services merit such high valuations?While Uber and Airbnb offer convenient services at affordable prices, maybe there are also unintended benefitsassociated with these business models.Case in point: traffic congestionOn first thought, there seems to be no apparent connection between on-demand ride sharing services and trafficcongestion. It is probably fair to say that alleviating traffic congestion was not on the original business proposal orcorporate agenda of Uber.On a second thought, there may be reasons to believe that Uber could influence traffic patterns. In fact, this hasbeen at the center of a debate among practitioners, policy makers and academics. Last year, one study from the1/3New York Times estimated that Uber vehicles contribute to about 10 percent of total traffic in Manhattan duringevening rush hours, but contended that it’s hard to measure the causal impact of Uber on the overall traffic increase.In a separate study, the Office of the Mayor in New York City released a report in January 2016 highlighting that thecity mayor’s contention that Uber vehicles and other ride-sharing services had worsened traffic in Manhattan isunfounded.So what is the takeaway from this heated debate? In a recent study, Ziru Li, Zhongju Zhang and I examined thisquestion using a novel data set combining the entry time of Uber into various geographic regions and the trafficpatterns from the Urban Mobility Report.This paper’s research design features Uber’s exogenous entry into different urban areas at different points in time.For example, Uber first launched its service in the San Francisco area in 2011, it gradually expanded to other majorcities around the United States. The differences in entry time allow us to use a difference-in-difference estimationmethod to infer the causal effect of Uber entry on traffic congestion.Notably, we found that Uber’s entry to different major cities leads to significant decrease in traffic congestion of theurban areas where the cities belong to, and further, it reduces commuter stress and carbon dioxide (CO2) emissionsthat are both direct consequences of traffic congestion. We further proxied Uber entry with the popularity of ride-sharing services (measured with Google Search Trends of the keyword combination “Uber” + “name of the urbanarea”) and found consistent results.So why has Uber alleviated traffic congestion? There are a few possible explanations.The first reason, we surmise, is that ride sharing increases average per-vehicle occupancy, thereby decreasing thetotal number of cars on the road by having more than one person in the car. A recent survey found that occupancylevels for ride-sharing vehicles averaged 1.8 passengers in contrast to 1.1 passengers for taxis in a matched pairanalysis. According to the International Energy Agency, adding one additional person to every commute trip couldachieve a saving of 7.7% on fuel consumption and a reduction of 12.5% on vehicle miles.The second reason could be that the low cost travel mode of ride sharing reduces car ownership. In a growingnumber of cities, ride-sharing services like Uber provide low cost alternatives to car ownership. According to arecent survey by North American ride-sharing organisations, 15 per cent to 32 per cent of ride-sharing memberssold their personal vehicles, and between 25- and 71 per cent of members avoided an auto purchase because ofride sharing.Traffic congestion continues to be a serious societal problem with few effective solutions. Will the on-demand ride-sharing services help partially solve it? We believe the answer is yes, and we are excited to witness the Uber effectunfolds.♣♣♣Notes:This blog post is based on the author’s paper Do Ride-Sharing Services Affect Traffic Congestion? AnEmpirical Study of Uber Entry, co-authored with Ziru Li and Zhongju Zhang (2016)The post gives the views of its authors, not the position of LSE Business Review, the London School ofEconomics or the University of Minnesota.Before commenting, please read our Comment Policy2/3Yili Hong is an assistant professor of information systems at the W. P. Carey School of Business,Arizona State University. His research focuses on online markets and consumer uncertainty. Hiswork has appeared in leading academic journals. He is the winner of the 2014 ACM SIGMIS BestDissertation Award, runner up of the INFORMS ISS Nunamaker-Chen Dissertation Award  and2012 ICIS Best Paper Award . He received his Ph.D. in information systems from the Fox Schoolof Business at Temple University. Copyright © 2015 London School of Economics3/3

Study shows that on-demand ride sharing mitigates traffic congestion

Abstract

Similar works

Full text

Available Versions

LSE Research Online