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Back to the old normal?

As traffic continues to worsen after, The MMDA has reinstated the number coding scheme albeit from 5:00 to 8:00 PM on weekdays for now. This is in recognition of the worsening traffic congestion brought about by people returning to their workplaces and the easing of travel restrictions across the entire population. People are now moving about as can be seen in transport terminals and commercial areas (e.g., shopping malls, markets, etc.). With the return of severe traffic congestion, it begs the question whether we are back to the ‘old normal’.

Jeepney with 4 ‘sabit’ passengers

I thought the photo above pretty much describes how it was before Covid-19. The problem is that this photo was taken earlier today and we are still technically in a pandemic. Does the photo show the people’s renewed confidence in using public transportation? Or is it a matter of necessity (i.e., commuters having no choice but to risk it in order to get to their workplaces or home)? If they had motorcycles, these people would likely use them instead of taking the jeepney. I will also dare ask why don’t they bike instead? They seem able bodied enough to try cycling instead. Is it because their commuting distances are long? Or are there other reasons that evade us? If these are the same reasons and Covid-19 is not a major factor for their choice, then perhaps we are back to the ‘old normal’ and have not progressed significantly despite claims by various groups that we are experiencing a paradigm shift in favor of active transport. All the more that we need to urgently revisit and reassess how transport should be in order for us to transition to a more sustainable future.

On roadway expansions and induced demand

We start December with another shared article. Here is another excellent article from Todd Litman about roadway expansions and induced demand:

Litman, T. (November 28, 2021) “The Roadway Expansion Paradox,”, [Last accessed: 12/3/2021]

Note the list of references at the end of the article for further reading.

On ‘electric cars’ still being ‘cars’

With the current climate talks in the background, there is also a parallel discussion on the impacts of electric vehicles and self-driving cars. Will they help solve our transport or traffic problems? Perhaps e-cars will contribute to the reduction of emissions and greenhouse gases. Perhaps they can also help in reducing dependence on fossil fuels. But can they alleviate congestion? Or will they just promote more car-dependence? Here’s a nice article from early this year that discusses the “big problem” with electric cars:

I also read another article about the issues concerning the batteries (e.g., lithium batteries) used by these e-vehicles. We are only beginning to see how difficult it is to deal with the waste of used batteries not just from e-vehicles but from other sources as well. Renewables like solar, for example, requires batteries for storage. These are issues that need to be addressed ASAP. Otherwise, it will be a losing proposition for people in general as they end up with modes of transport that are not sustainable for the future. Perhaps we can just walk or bike?

On phantom congestion

I’ve talked about phantom congestion in my class lectures and training modules but have always explained it through figures and diagrams I usually draw on the board as I discuss the topic with my students or trainees. Here is a very informative, very visual explanation of what typically happens along many roads and how there is congestion when there seems to be no reason at all for these traffic jams:

Have you experienced these phantom traffic jams yourself?

Is there a supply problem with public transport in NCR plus?

I initially wanted to use “Philippines” or “Metro Manila” instead of “NCR Plus” for the title of this post. I dropped “Philippines” in order to be more specific and also because I am not so aware of the situation in other cities outside Mega Manila. I also decided vs. “Metro Manila” because transport for the metropolis is tightly woven with the surrounding areas where many people working or studying in MM actually reside. These include the towns of Bulacan, Rizal, Laguna and Cavite.

So, is there a supply problem with public transport in what is dubbed as NCR+? The photos in social media appear to describe a lack of public transport vehicles with many people lined up along major roads, queued at terminals or train stations. These photos do not lie where they were taken. Indeed there is a big problem about supply along certain corridors due to certain factors such as limited number of public utility vehicles (mainly jitneys and buses) allowed operation and health protocols that limit the passenger capacities of vehicles. The latter also applies to rail services where despite rolling stocks being back to pre-pandemic operations, are limited to the number of people they can carry. Crush loads are a no-no during these times.

Traffic congestion and its effects on PUV turnaround times, however, is another major factor for what may seem like a lack of supply. Most road-based public transport operate in mixed traffic. As such, their operations are susceptible to traffic conditions along their routes. So it is very likely that during the peak periods, PUVs get stuck along the peak direction and take much time to return despite the lighter traffic along the return trip. The problem for some routes though is that during peak periods both directions are congested. This further exacerbates the situation for public transport as vehicles would have to go through a two-way gauntlet of sorts, resulting in a lot of people taking longer to get their rides. And so for those who have access to private transport do go back to using private vehicles.

Definitely and obviously, there is a mode choice issue here because many people appear to have taken private transport as their mode of choice instead of public or active transport modes. This is mainly attributed to the perception that public transport is unsafe or less safe compared to your own vehicle in the context of the current pandemic. We qualify the current health situation here since that seems to be the main driver for people choosing to take their cars apart from that other perception of the poor quality of service provided by public transport in general. For active transport, the reality is not everyone or not a lot of people will choose to walk or cycle along roads that are generally regarded as unsafe despite efforts to put up bike lanes. Those who are having problems commuting are those dependent on public transport also because of their long commutes between the residential outside or in the outskirts of Metro Manila and the CBDs in the metropolis.

The dilemma here is determining which routes would actually require additional vehicles. While the general perception and temptation is to add vehicles everywhere, it’s the actual numbers that need to be estimated based on the information that needs to be collected (as against available data, which can be unreliable). The situation and the data for different routes varies much.

Case in point is the experience along the Antipolo-Cubao route that used to be served by jeepneys. Buses now serve that route after the government rationalized the service. Initially, there were fewer buses operating along the route that had a large catchment area for passengers. Additional buses were deployed in order to address supply issues (again many passengers were not able to get their rides for the same reasons we mentioned earlier). Now, there seems to be enough buses for the peak periods but a surplus during the off-peak. Passengers along other routes are not as lucky as those served by the Antipolo-Cubao buses.

Public transport operations will not survive such variations in demand if they continue to operate under the old “boundary” or rental scheme. So, there has to be a subsidy somewhere for them to operate under these conditions. And that’s where service contracting comes in. While I agree that this is essential for transport reform, we still have limited resources, and it will not be sustainable in the long run if we cannot make people take public transport over private vehicle options.

It’s not that simple: the math on vehicle sales and registration

I read the statement of a government official about vehicle sales, and the subsequent responses it got. He cited math and seemingly joked about not being good at it while trying to make sense of the numbers. It is not as easy as he supposes. And I think that is partly why we fail to address the transport problems. For one, we think it is just about road capacities. For another, it may be about public transport supply. These are not mutually exclusive but rather intertwined along with so many other factors.

Housing, for one, (i.e., its availability, affordability and location) is among the most important factors that affect or influence how we commute. I have been asking the question about housing affordability in CBDs such as Makati, Ortigas and BGC. Lucky for those who already reside at or near those places but most people working there have to contend with expensive mortgages, leases or rents. How much is a condo unit in BGC, for example? If you have a family of 4, you certainly can’t and won’t opt for a studio unit just because its near your workplace. It’s obvious here that you also would have to consider where your children will be going to school as well as the workplace location of your partner if he or she is also working. No schools for now but imagine how it was and would be once our children go back to physical school. Such facts of life seem lost to many pundits commenting or offering opinions about transportation.

I think to be fair this should also be framed from various perspectives. For example, those vehicle purchases don’t necessarily mean additional vehicles on certain roads. like what one MMDA official claims. These will be distributed across the network of roads, and these will be operating during certain times of the day. Some of these vehicles were purchased by new car owners. Others as replacements to older or unserviceable units (e.g., upgrades). It would be nice to see, for example, the stats from 2008, 2009 & 2010. Thousands of vehicles were doomed by Ondoy in the greater Metro Manila in 2009 resulting in their replacements late that year until 2010. Then there was the boom in sales in the following years as people ventured into TNCs (Uber and Grab). The recent surge in private car use and what seems to be strong sales of these vehicles in the wake of the Covid-19 pandemic is more out of necessity (why do you think people aren’t taking to cycling for their commutes as much as is desired?)

The question why people still prefer to purchase and use their own vehicles has not been answered in the most honest way because different people with their own agenda tend to paint different pictures of the car owner. In some cases, car owners are being portrayed as ‘evil’ while those taking the more environment-friendly modes as ‘good’. Again, it should be obvious that this is not a ‘good’ vs. ‘evil’ discussion nor is it something that is black and white. We should pay (a lot of) attention to the grays, which can have so many different shades when it comes to transportation. No one really wins a “holier than thou” exercise where people on opposite sides tend to take hard line stances and close their minds to constructive ideas from either side.

Traffic is back to “normal”

Traveling to the office last Monday, I could not help but notice the long lines of cars along Ortigas Avenue’s westbound lanes and Katipunan’s southbound lanes. Without adequate public transportation, people have few options for their commutes. Walking from home to workplaces is feasible only for those who live relatively near their workplace (perhaps up to 5km distance?). Cycling may be considered but not everyone can bike beyond 5km, what more for 10km+ commutes. And for both cases, there are just so many obstacles (and I’m not just fault-finding here) like a lack of sidewalks and bike paths to ensure safe walking and cycling.

Traffic congestion along Felix Avenue in Cainta towards Cainta Junction (with Ortigas Avenue Extension) – these are mostly outbound traffic likely coming from the residential subdivisions along Felix Avenue and heading to workplaces in Pasig, Mandaluyong, Makati and Taguig. They will likely take Ortigas Avenue to connect with other major roads such as C-5 and EDSA to get to their destinations.


The DOTr and the LTFRB have released guidelines for safety and the prevention of the spread of the COVID-19 virus. Yet, they have moved quite so slowly to bring back public transportation to address the demand for it and to be able to discourage or restrict car usage in the “business-as-usual” or “old normal” sense. Public transportation is critical if we are to transform transportation during this transition from the lockdowns. Granted, the government probably wants to use the situation to effect its modernization plans but it is one thing to take advantage of the opportunity and another to be an opportunist considering the vulnerabilities of the transport sector after it endured 3 months of shutdown. The moral and right thing to do is to bring back public transport and give incentives for it to thrive and perhaps transform or upgrade by themselves rather than force the situation at the expense of commuters.

Assessing the risk of infection from the transport safety perspective

My colleagues and I have been developing a risk assessment table for land transport modes to be submitted to the UP COVID-19 Response Team. We did a rapid assessment using mainly concepts from road safety.

The concepts are fairly simple. Risk assessment can be based on the likelihood of contracting the virus gauged from certain exposure factors. Exposure estimation may be quantitative where metrics are applied and data collected for the analysis. Estimation may alternatively qualitative based on experiences, perceptions, expert opinions, etc. but subject to logic (e.g., careful deduction). In road safety, for example, these factors may be defined as three: time, distance and volume.

Time exposure can be determined using travel time as a metric. Longer the travel times mean higher exposures for a commuter. Higher exposure translate to a higher likelihood that a person may become involved in a road crash. Thus, a commuter traveling for 1 hour, one way, will have a higher likelihood of being involved in a crash compared to another traveling only 10 minutes even assuming that both use the same mode of transport. Applied to the risk of viral infection, longer commutes may mean people can have higher exposure to potential carriers of the virus.

Distance exposure can be determined using travel distance as a metric. Longer travel distances mean higher exposures for a commuter. Higher exposure again translate to a higher likelihood that a person may become involved in a road crash. Thus, a commuter with a travel distance of 10 kilometers will have a higher likelihood of being involved in a crash compared to someone traveling only 1 kilometer. Applying this to the risk of viral infection is similar to the previous case for time exposure even when assuming the same mode of transport.

Volume exposure can be determined using both the volume of vehicles as well as the number of passengers inside the vehicles. The more vehicles or people you have on the roads interacting, the higher the likelihood of one becoming involved in a crash. It can also be argued that riding public transport in high volume, mixed traffic makes a passenger have a higher likelihood of being involved in a crash. Again, applying this to the risk of viral infection, it should be easy to understand why physical distancing is necessary in vehicles as well as outdoors when walking or cycling. It should also extend to having less vehicles on the road to further reduce the likelihood of spreading the virus.

In the real world, we cannot isolate each factor from one another. Instead, we have to contend with all three combining to create various scenarios. Along expressways, for example, the volume of vehicles might be high and so are distances. Time exposure can be lower due to high speeds. Yet high speeds can contribute to increased likelihood of crashes. Meanwhile, traffic congestion has all the ingredients for maximizing the likelihood for crashes and, by extension, viral infection. Long commutes (by time and distance) plus high volumes of people and vehicles combine to create the worst case scenario from the perspectives of both road safety and infection, which are both public health issues.

Next – Why we should not return to the old normal…

Is traffic congestion like a virus?

An article came up where the author explains the similarities of the coronavirus spread to the spread of traffic congestion. It is basically about modeling (and simulating) the spread while considering factors like the characteristics of the virus that are similar to traffic. I’m posting/sharing it here for future reference/reading:

Simon, M. (2020) “Turns Out, Traffic Spreads Like the Coronavirus”,, %5BLast accessed: 4/8/2020]


SLEX congestion

En route to Batangas the other day, we had to endure severe traffic congestion along C5 and SLEX. C5 was at its worst as it took us about 2 hours from Blue Ridge until SLEX. Descending from the flyover to SLEX, we were greeted by crawling traffic along the tollway, which was to us a slight surprise for the southbound direction. Normally, traffic would already be lighter compared with the northbound side that carried peak hour travelers inbound for Metro Manila.

Much of the ‘additional’ congestion along SLEX is attributed to the ongoing construction of the Skyway extension. Traffic management is particularly criticized and congestion very atrocious at Alabang on ground level beneath the viaduct. Buses are prohibited from using the viaduct and the traffic schemes have contributed to severe congestion. Through traffic along both sides of the tollway have been affected, too, with queues reaching Laguna.

Preview: Passing the Alabang area, we observed that the queue from Alabang already stretched beyond what is visible to the eye.

No end in sight: this is what we usually describe as a traffic jam condition with the density reaching its maximum value and speed at its lowest. Volume approaches zero for this case.

Horizon: The queue that morning reached the Southwoods exit of the SLEX. Approaching northbound travelers would have to endure severe congestion until Alabang.

On hindsight, I thought that we should probably have opted to fly between Quezon City and Lipa City. My colleague said that the contact person offered that option to us but that he turned it down because he gets dizzy riding helicopters. I wouldn’t know as I’ve never ridden on one. However, we also thought it wouldn’t be prudent for us to ride a helicopter from the university. It would seem to be the transport of VIPs and easily attracts unwanted attention. Yet, it would have been the more practical and speedy if not the less expensive option for the trip that day.