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On a ride-hailing apps algorithm and surge pricing

I am sharing this very informative article on ride-hailing based on an investigation conducted by investigative journalists:

Ilagan, K. and Rainis, F.A. (December 10, 2024) “How we investigated the algorithm behind the Philippines’ largest ride-hailing app,” ijnet.org, https://ijnet.org/en/story/how-we-investigated-algorithm-behind-philippines-largest-ride-hailing-app?fbclid=IwZXh0bgNhZW0CMTEAAR2azviuNxdh5gSbrJKl8lsViL5YRO5k33QHFc24EAFkIi4HTo-Ew4H7LO4_aem_NnVHOD8B1PERNOQYSjVHdg [Last accessed: 12/27/2024]

To quote from the article:

“Once all the fares were broken down, we found that a surge fee was always present. With the help of statisticians from two local universities, we conducted a statistical analysis to scientifically determine whether the waiting time for a ride decreases when the surge fee is higher.

The results didn’t show a significant correlation between the surge rate and waiting times. This contradicts the assumption that a higher rate attracts more cars to the street and lowers waiting times.”

I leave it up to my readers to make their own assessment of what the conclusions to this report state or imply. The bottomline is that the ride-hailing company is making a lot of profit from their surge pricing scheme that really doesn’t make it easier for people to get a ride from their app.

On bike lanes contributing to safer roads

Do bike lanes make roads safer? There are obviously mixed reaction to this question especially if you look as social media. If we are level headed about this topic and look at the evidence out there, the answer is yes. But there can be caveats as we try to contextualize in the local setting. The formal studies so far are in countries where the drivers arguably more disciplined than ours here in the Philippines. Driver behavior, after all, is a major factor for road traffic safety.  Here is a good article for reference in the discussions and arguments for bike lanes:

Tu, Maylin (November 5, 2024) “How Bike Lanes Slow Drivers and Save Lives,” Next City, https://nextcity.org/urbanist-news/how-bike-lanes-slow-drivers-and-save-lives [Last accessed: 11/10/2024]

To quote from the article:

“Bike lanes with physical delineators (cones or bollards) were more effective than paint-only lanes at calming traffic, echoing a popular mantra for bike activists: “Paint is not protection.” (The lanes were not protected, however, because drivers could drive over the delineators.) For vehicles turning right, top speeds were reduced by 28% and average speeds by 21%. Paint-only bike lanes slowed driver speeds by up to 14% and drivers going straight slowed down by up to 8%…

The study adds that pop-up bike lanes are a cost-effective solution for studying the effects of more permanent solutions — after all, you could just borrow the traffic cones. A city could quickly implement pop-up or temporary infrastructure. Then, armed with data and community feedback, they could invest in making the changes permanent.”

The article also points to a technical paper or scientific article on the traffic calming effect of bike lanes. Here is the link to the article published in the Journal of Urban Mobility: https://doi.org/10.1016/j.urbmob.2024.100071

On the need for helmet laws and their implementation to reduce fatal road crashes involving motorcycles

I found this article reporting on findings of their study on helmet laws and their impacts on road safety:

Insurance Institute for Highway Safety (October 20, 2024) Lax helmet laws have killed more than 20,000 motorcyclists, study shows, https://www.iihs.org/news/detail/lax-helmet-laws-have-killed-more-than-20-000-motorcyclists-study-shows [Last accessed: 10/23/2024]

To quote from the article:

“Wearing a helmet is one of the biggest things riders can do to protect themselves from death and traumatic brain injury,” said Eric Teoh, IIHS director of statistical services and the author of the paper. “We understand that requiring helmets for all riders everywhere would be unpopular with some motorcyclists, but this could save hundreds of lives each year. Those aren’t just numbers. They’re friends, parents and children.”

There’s a link to the study report in the article for those who want to have a copy of the report.

30th Annual Conference of the Transportation Science Society of the Philippines (TSSP)

I was not able to post on the conference itself but it was definitely a success including the pre conference workshop (Workshop for Young Researchers or WYRe) held for the benefit of young researchers in transportation science.

Here is the link to the TSSP’s official page featuring the program for the Technical Sessions: https://ncts.upd.edu.ph/tssp/archives/2972

There were 6 sessions with papers on public transportation, active transport, traffic engineering and others including port operations and safety. A total of 27 papers were presented and in attendance were more than 150 people, mostly from the academe. The conference was conducted in cooperation with the University of the Philippines Visayas and the City Government of Iloilo. When available, I will also later share information about the very informative and enlightening keynote lecture delivered in the morning of the conference on the topic of Global Health.

Technical sessions at the TSSP 2024 Conference

I am sharing here the latest draft of the technical sessions for the 30th Annual Conference of the Transportation Science Society of the Philippines (TSSP). The conference will be held in Iloilo City this coming September 13, 2024.

I will share the draft program for the morning plenary session in the next post.

On trees as solution to many of our urban problems

I am sharing this nice article on trees being the solution to many of our urban problems. I think many people have come to notice the importance of trees and the role they play with the increasing temperatures (i.e., heat) we’ve experienced the past years. The science on this state much more and covers not just temperatures but flooding, energy and infrastructure as well. Discussions and examples on these are in the article:

Durand-Wood, E. (August 8, 2024) “The Multi-Tasking Marvel: How Street Trees Can Solve Many Municipal Problems,” Strong Towns, https://www.strongtowns.org/journal/2024/8/8/the-multitasking-marvel-how-street-trees-can-solve-many-municipal-problems [Last accessed: 8/28/2024]

To quote from the article:

Planting and maintaining street trees is an investment, but it’s one that pays for itself over and over again. Cities around the world are starting to calculate the economic value of their urban forests, a task made feasible with tools like i-Tree.

And more research is finding that trees pay for themselves many times over. A U.S. Forest Service study “conducted in five U.S. cities found that every dollar invested in the management of urban trees [ …] yields annual benefits of $1.37 to $3.09.

Trees are also the perfect example of a small bet. They cost relatively little, but the many varied returns are so high.”

SPRINT principles for bicycles

Here is the link to how to improve your city’s or municipality’s bicycle facilities based on scores guided by the SPRINT principles: https://cityratings.peopleforbikes.org/create-great-places

SPRINT stands for:

S -Safe Speeds

P-Protected Bike Lanes

R-Reallocated Space

I-Intersection Treatments

N-Network Connections

T-Trusted Data

The site provides links and examples of good practices of actual bike projects in the US. Many of these can be replicated or adapted to Philippine conditions. These are something that the active transport section of the Department of Transportation (DOTr) should look into and perhaps provide a reference for developing and improving bicycle facilities in the country.

On the idea of congestion pricing

I purposely titled this post to include the word ‘idea’ as congestion pricing is still very much like that in the Philippines. It is a reality in some part of the world particularly in Singapore where its Electronic Road Pricing (ERP) has evolved and improved over the years. Its success though seems to be an exceptional case that has not been replicated elsewhere where conditions are not exactly like the city state’s.

Here is an article that recently came out from The Washington Post about the New York Governor’s decision to backtrack on the proposed congestion pricing initiative in New York City:

McArdle, M. (June 12, 2024) “People hate traffic. They also hate this great idea to clear it,” The Washington Post, https://www.washingtonpost.com/opinions/2024/06/12/congestion-pricing-great-idea-people-hate/ [Last accessed: 6/14/2024]

To quote from the article:

“Roads are a scarce good; you can fit only so many cars on a road at one time, and fewer if you would like those cars to go somewhere. When roads are “free,” we are forced to fall back on a more costly and inefficient strategy: sitting in traffic. This wastes valuable human time and inflicts noise and pollution on everyone nearby. Far better to charge a modest price that inspires some drivers to carpool and others to take public transit or shop nearer to home, until supply and demand are balanced and traffic flows easily…

In political disputes, a discrete group facing highly concentrated costs often defeats a larger public interest that conveys a small individual benefit to everybody — such as being able to move around the city faster when you really need to. This is particularly true in the American system, which is designed to empower angry minorities. And it’s especially true when they’re abetted by status quo bias and a sympathetic majority, as in this case.

Complain all you want about selfish suburban drivers or the Metropolitan Transit Authority’s bloated cost structure or Hochul’s cowardice; the biggest obstacle to congestion pricing is that almost two-thirds of New York City residents have told pollsters they oppose it — in a city where less than half of all households even own a car. A more technocratic, less democratically responsive government might have been able to ram it through, and perhaps in time everyone would have come to like it. But in fractious America, with all its political veto points, congestion pricing is doomed by the reality that people hate slapping prices on things — especially if they have to pay them.”

There is a congestion pricing proposal in Baguio City and we don’t know yet how this will go. I don’t have the details yet except that a private company whose core business is tollways is involved. Will this be a model or a proof of concept? Or will it just go the way of a typical tollway where users are those who are willing to pay and which would eventually congest if most of the current users pay and use it anyway? Will the funds generated be used to develop a more efficient transport system for Baguio, eventually leading and contributing to less congested streets? That would also mean eventually less revenues from the congestion pricing scheme and probably lead to it being unnecessary.

On the impact of bike lanes on motor vehicle traffic

With the news that bike lanes will be removed along major roads including, most recently,  I share some findings from the US about a decrease in traffic speeds when there are protected bike lanes. The decrease in speeds are associated with a reduction in road crashes, ergo safer streets.

McPherson, K. (June 3, 2024) “Traffic Speeds Decrease When Bike Lane is Present,” Rutgers.edu, https://www.rutgers.edu/news/traffic-speeds-decrease-when-bike-lane-present [Last accessed: 6/8/2024]

To quote from the article:

“They found that the presence of the delineated bike lane made a difference: a 28 percent reduction in average maximum speeds and a 21 percent decrease in average speeds for vehicles turning right. For those heading straight and not turning, a smaller speed reduction of 8 percent was observed. In addition, drivers moving at a perpendicular angle to the bike lane did not slow down.

Marking the bike lanes with cones as a clearly delineated space was more effective at reducing speed than a painted-only bike lane. The painted-only bike lane was associated with a smaller speed reduction of between 11 percent and 15 percent, but only for drivers turning right.

Younes hypothesized that drivers slow down when they see a bike lane marked with the cones because the driving lane is narrower and requires more concentration, and it’s easier to notice cones or planters or some other space delineator than it is to spot painted lines on the road surface.”

Of course, one major element that was probably not considered in their studies is the presence and behavior of motorcycle riders. Motorcycles here frequently enter and use bike lanes whether protected or not. Often they crowd out bicycle users leading to situations where riders of motorized and non-motorized 2-wheelers come into conflict. Still, it would be nice to have a study to determine not just whether there are similar outcomes here but to what extent as well as how motorcycles figure in the study.

Extreme turbulence during air travel

Transport-related news last week included a report about a Singapore Airlines B777 jet flying to London from Singapore that had to make an emergency landing in Bangkok due to extreme turbulence experienced. Many people were seriously injured when the plane suddenly ascended (“tilted up” as some news reports state) and then abruptly descended, resulting in people being tossed up and hitting the compartments above their seats. Obviously, these passengers were not wearing their seatbelts at the time. Otherwise, they would have been restrained to their seats. It is likely that the turbulence was not anticipated by the pilot as they usually advise passengers to put on their seat belts if turbulence was expected at any time during a flight.

The incident raises concerns about extreme and sudden turbulence occurring during flights. I guess this may happen anytime and aircraft instruments may not be able to tell the crew about an impending incident like this. Will such an incident have a significant impact on air travel? Perhaps not if these incidents remain rare. There should be records and monitoring of factors or elements leading to such incidents in order to establish the likelihood of these happening. Incident records will also show if there is an increasing frequency as well as the number of people killed and injured. Such information would be vital as more people use aviation for travel and there are more aircraft activity around the world.

As a precaution, it is good practice not to remove your seatbelt while seated in flight. If it’s tight, then loosen it. At least you have some restraint in case of incidents where the aircraft encounters sudden turbulence.