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What type of seat is appropriate for your child?

I wrote yesterday about the new law requiring child seats for children 12 and under or under 4’11” in height in the Philippines. The implementation has been postponed after government received a lot of flak about it. To be fair, the info campaign started months ago but it seemed to be limited to social media and not really disseminated as widely as is ideal. The material while catchy at first glance, is not as clear in the info or message as already evidenced from the flak about the law and its provisions.

Here is a graphic from the US National Highway Traffic Safety Administration (NHTSA) that is quite easy to understand:

Based on the information from the NHTSA, the CDC came up with the following graphic:

It would have been clearer and more effective in communications if the agencies-in-charge came up with similar material rather than the one I shared in yesterday’s post. There are also many designs for child seats and so far there are no specifics about these that people could refer to. Ultimately, I believe there should be a list of what are allowed or not allowed including brands. Perhaps its better to have a list of what are not allowed with the reasons for these, and then let the manufacturers challenge these. Having a list of allowed products might come off as advertising or favoring certain manufacturers. Of course, it will be up to the Bureau of Product Standards (BPS) of the Department of Trade and Industry (DTI) to determine which seats will be allowed based on their specs and the standards they conform to. European and US standards are among the most stringent so perhaps these can be reviewed and determine whether they can be adopted in the Philippines.

On using a car for transport in the time of COVID-19

We start the month of February with a very informative articles from the New York Times about car use and the spread of Covid-19. There have been a lot of discussions or discourse, even arguments, about private car use or shared vehicles (e.g., Grab) as people have apparently chosen these over public transport in many parts of the Philippines. For one, there is still a limited supply of public transport as government tries to take advantage of the situation to implement their rationalization and modernization programs.

The following article is from the US but the principles presented particularly about air flow and the potential spread of the virus inside a car are factual and apply in a general manner to other situations including ours. It is important to have an appreciation of the science behind air circulation and how it relates to the potential infections.

Anthes, E. (January 16, 2021) “How to (Literally) Drive the Coronavirus Away,” New York Times, [Last accessed: 2/2/2021]

The common misconception appears to be that using private vehicles automatically helps spread the coronavirus. The science tells us it is not as simple as that (i.e., using your own vehicle will lead to your and your family being infected). While private vehicles are not the proverbial suit of armor vs. Covid-19, their proper use might give better chances compared to crowded and/or poorly ventilated public utility vehicles. Walking and bicycles, of course, are most preferred but that’s a topic for another article. 

On the plastic barriers for jeepneys

The minimum requirements for conventional jeepneys prior to their returning to operations include the installation of barriers so as to have physical separation between passengers. Ideally, such separation should be a distance of at least one meter, which was initially relaxed to ‘one seat apart’, and then further relaxed to just the barrier separating passengers. You see various designs installed in jeepneys. I posted a couple in an earlier post showing examples of customized and DIY barriers. Here is another that looks like there was more effort involved in the making of the plastic barriers:

 Specially made plastic barriers with messages and graphics on social distancing printed on them. 

Jeepney drivers are obliged to reject or unload passengers not adhering to the protocols including those refusing to wear face masks and shields while commuting using public transportation modes. I assume that they are really doing this for their and their passengers’ safety and well-being.

More parks and trees = longer lives

Here is an article about a topic that seems unrelated to transportation but is actually strongly related to it. We already know about the benefits of tree-lined boulevards and parks as lungs of a town or city. The following article discusses the benefits and advantages of having more parks and trees.

Yanez, E. (November 19, 2020) “More Parks, Longer Lives,” Parks and Recreation,

I suddenly recall what were tree-lined national highways across the country. Many of these trees were cut down to give way to road-widening projects of the national government through the Department of Public Works and Highways (DPWH)., Nevermind that the widening was not really required in many if not most cases, and that the trees were never replaced or was there ever an effort to do so. The results have been disastrous in terms of the environments along these roads. Transport systems can also be developed with parks and trees in mind; especially if active transport were the focus of the development. Surely parks and trees will enhance the environment and encourage more people to walk or cycle. This should translate into better overall health and wellness for people.

Walk, walk, walk

When I was living in Japan in the late 1990s and again in the early 2000s, I recall walking a lot every day. I felt healthy then not just because I thought I ate well but I had a lot of exercise, too. I consciously walked and jogged in the mornings and/or afternoons depending on the weather. And my commute included walks between my train station and the university. The following article seems to support what should be a healthy lifestyle without gym time.

Okumura, K. (November 6, 2020) “How Japanese People Stay Fit for Life, Without Ever Visiting a Gym,”,

I tried to estimate the number of steps I took on average each day. It seems I could easily make more than 10,000 steps everyday as I usually walk more than 6,000 steps for my commute and the typical walks in and around campus (including lunch time strolls with friends). My morning and afternoon walks can match this 6,000 steps. These can even be more during weekends when I’m out in the city or in Tokyo to be with friends. These steps seem nothing then and I loved to walk around partly to keep my sanity while studying there.

When I was visiting researcher later at another university, my step count was about the same if not higher. The only difference perhaps between Yokohama and Saitama was that I had a bicycle when I was in Saitama. The bicycle increased my range and I took the bicycle lent to me by friends to dome groceries or explore the nearby wards. Those were the days, I guess, that I wished I still have now in terms of more active transportation.

New WHO publication on transport in the context of COVID-19

I’m just sharing the new publication from the United Nations (UN) World Health Organization (WHO) – Supporting healthy urban transport and mobility in the context of COVID-19:

The brief document contains recommendations for travelers and transport service providers. It is a compact, concise reference for everyone as we continue to deal with the impacts of COVID-19.

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…

On the DOTr for Public Transport – Maritime Sector

Here’s a continuation of the set of guidelines issued by the Department of Transportation for transport operations for areas that are or will be under the General Community Quarantine (GCQ). Again, I try to refrain from making any critiques or comments, and post this for information and reference.

On walking, running and cycling for exercise during the Covid-19 pandemic

We had been walking in the early mornings prior to the so-called “total lockdown” implemented by our Barangay. There were others like us in our community who walked, jogged or cycled during the same time we took our walks. However, we all practiced physical distancing and used masks while outdoors. We could afford to do this because the village where we resided in had relatively wide streets and there were few houses and residents compared to other residential areas. In our case, we usually walked in areas where there were even fewer houses and people. It is highly unlikely we could get Covid-19 during our morning walks. Afternoons were different as we observed more people going around including those who appear to be joyriding with their motorcycles.

Is there actual evidence that walking, jogging, running or cycling actual aid the spread of Covid-19? So far, there isn’t and what we have are mostly simulations. Yes, simulations like those that appear in articles that are going around the internet; often shared in social media. Here is a more informative and objective article about this topic that articulates more the importance of physical activity (i.e., in the form of walking, jogging, running or cycling) in combatting the virus while also emphasizing the need for social or physical distance and the use of masks:

Niiler, E. (2020) “Are Running or Cycling Actually Risks for Spreading Covid-19?”, Wired, [Last accessed 4/15/2020]


I appreciate the efforts of those in our Barangay to make sure no one gets infected (there are zero incidents so far). However, sometimes the overeagerness seem to trump the need to practice common sense in these times. I believe there is a need to make an even bigger effort to ensure people are able to maintain physical and mental wellness through exercise or activity. I believe we are in a community where people are educated, aware and responsible enough to make this work.

On the importance of trees in the urban setting

Having lived in two other countries and traveled in many others, I have seen and experienced for myself examples of tree lined avenues and streets in the urban setting. And I am not talking about small cities but big ones like Tokyo and Singapore. I have gone to many of the big cities in Japan to be able to say that trees should have their place in the so-called urban jungle and the benefits of having them are tremendous. Here is a nice article recently published in The Guardian that explains the advantages of green streets:

Balch, O. (2019) “Green streets: which city has the most streets?”, The Guardian, [Last accessed: 11/08/2019]

Philippine cities should heed the advice from the author and city and municipal planners should make sure that plans incorporate trees and other flora. Obviously, they are not just ornamental but rather should be indispensable components of our towns whether it is highly urbanized or not. I guess the same concepts apply also to the roadsides of our national highways. The Department of Public Works and Highways (DPWH) clearly had little or no regard for greenery; chopping down even the elder trees along the way of their road widening programs. As such, they have contributed to blight along these roads and it would take some time and effort to bring back what used to be tree-lined, canopied roads in many provinces.