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Category Archives: Behavior
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.
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Safety or speed?
We start June by sharing a video on why safety and vehicle speed are incompatible:
I saw this video while browsing an article on “Dangerous by Design”. The article discusses a new publication where road designs are evaluated from the perspective of safety. Most of our roads have been designed with speed in mind. That is, how to facilitate the movement of motor vehicles to ensure they travel faster. Forgotten or, even worse, disregarded is the most important element of safety. Why do we widen roads or insist on higher speeds in populated areas or school zones? Such questions are not addressed directly or not answered at all by agencies in charge of planning, designing, constructing and maintaining roads and bridges. The same is true for agencies or units in charge of traffic regulations or management. The result not surprisingly is an increase in the number of road crashes, fatalities and injuries due to our roads being ‘dangerous by design’.
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On non-roadway traffic deaths and incidents
I found this interesting article about non-roadway crashes or incidents that may cause deaths. These are often recorded in buildings including parking lots or facilities but are not generally collected and reported by governments as part of road crash data.
Wilson, K. (April 18, 2024) “Why Does the Vision Zero Movement Stop At the Edge of the Road?,” Streetsblog USA, https://usa.streetsblog.org/2024/04/18/why-does-the-vision-zero-movement-stop-at-the-edge-of-the-road [Last accessed: 4/28/2024]
From the article:
“According to the latest report from the National Highway Traffic Safety Administration, a shocking 3,990 people died in car crashes that occurred outside of the traditional transportation space in 2021, the last year for which data is available. One-quarter of those people were outside vehicles, including, pedestrians, cyclists, wheelchair users, and even children simply wishing their parents goodbye before they were accidentally run over by the caregivers who loved them most; all lost their lives after they were struck by drivers on private property, like parking lots, driveways, drive-thrus, and private roads.”
These crashes very likely contribute to under-reporting. One wonders, for example, how many incidents occur in mall parking lots, schools and subdivisions. Recall the incident in Ateneo years ago when a child got ran over and killed as students were being dropped off in the morning. Surely there are other incidents though not involving deaths, and these need to be recorded among traffic incidents. The deaths need to be included in the reports. These are important information to complete the picture of road traffic safety in any country including the Philippines.
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Article share: on making more affordable neighborhoods
I’ve been commenting about how transportation cannot be isolated and the need to relate it to other factors such as housing or home location choice. The latter though is also affected by other factors as well that affect the affordability of homes near the city centers or CBDs where workplaces and schools are located. The result of course is sprawl or the encouragement of sprawl. Private companies take advantage of this or contribute to this ‘encouragement’ by developing land farther away from the center. Thus, for Metro Manila’s case, many people reside in the peripheral provinces of Bulacan, Rizal, Laguna and Cavite. There are even those who choose to reside in Pampanga, Bataan and Batangas.
Kayatekin, C.S. and Sanmiguel, L.U. (April 16, 2024) ” ‘Urban form’ and the housing crisis: can streets and buildings make a neighborhood more affordable?” The Conversation, https://theconversation.com/urban-form-and-the-housing-crisis-can-streets-and-buildings-make-a-neighbourhood-more-affordable-224108 [Last accessed: 4/23/2024]
Quoting from the article:
“Our main finding was that the bottom-up districts we looked at had, overall, more small-scale apartments. The reason is simple: they had more small-scale buildings, built on small-scale plots. Once divided into apartments, this produces small apartments – homes in the bottom-up areas were 10% to 23.1% smaller than their top-down counterparts. This also made their real estate markets for small homes more competitive, and therefore more affordable.
However, our study showed there is nothing inherently magical about bottom-up areas. Their more intricate housing stock has little to do with the layout of streets and blocks, and a lot to do with how that land is built upon.
Plot size appears to be the deciding factor: the districts with greater numbers of small buildings built on small plots supported a denser and more affordable housing stock, regardless of whether they were top-down or bottom-up.
Older bottom-up areas seem to naturally lend themselves to having more small-scale plots. This is likely due to the incremental development of these areas, and the complex land ownership patterns that developed as a result. However, there is no reason why a top-down area cannot be designed to replicate these characteristics.”
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When Driving Isn’t an Option: Steering Away From Car Dependency
Here is another quick share of an article from Planetizen. The article relates about people who cannot drive so driving for them is not an option:
Source: When Driving Isn’t an Option: Steering Away From Car Dependency
Quoting from the article:
“Zivarts shows that it is critical to include people who can’t drive in transportation planning decisions. She outlines steps that organizations can take to include and promote leadership of those who are most impacted—and too often excluded—by transportation systems designed by and run by people who can drive. “
There are actually many who can drive and who would like not to drive but then opt to drive because of limited and inconvenient or uncomfortable options. I think government agencies and local government units are supposed to work on this but like people who try to ‘solve’ traffic by isolating it from other factors such as housing, they ultimately gain little ground if not fail. It doesn’t help that the decision makers such as government officials and politicians drive or are driven. Of course, there is still such a thing as empathy so let’s not discount those who do use cars for their commutes but also work hard to improve transportation. It’s just that such people are rare these days and may not be in a position to move things to enable significant improvements to the transportation system.
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A risky mode choice – recumbent bike
I spotted this cyclist along Ortigas Avenue Extension. He would be hard to notice considering how low the vehicle is and his position astride the bicycle.
Man on a recumbent bike probably on his daily commute. Note the bike and its rider as compared with the small truck.
The problem is concerning his visibility to regular or typical road users. He might not be visible for the larger vehicles like trucks and buses, even jeepneys and vans whose drivers may be distracted by other vehicles in the traffic mix.
Comparison with a typical cyclist, who is quite visible as shown in the photo
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Counterflow irony along Ortigas Avenue Extension, Pasig City
One Friday, I traveled to Ortigas Center from Antipolo via the most direct route using Ortigas Avenue Extension. I was not surprised by the counterflow scheme being implemented starting from De Castro all the way to Rosario Bridge. I was also not surprised that the more congested lane was the counterflow lane. I thought everyone expected the main traffic lanes to be congested as PUVs like jeepneys, buses and vans usually create bottlenecks as they block traffic while passengers board/alight along that section of Ortigas Avenue Extension. Here is what you might encounter in terms of traffic if you opt to stay along the westbound traffic lanes:
Traffic before the Manggahan floodway bridge at what was generally called Mariwasa. The Filinvest residential development on the left used to be the Mariwasa tiles plant.
Traffic after the crossing the bridge. Note the pedestrian overpass in the photo.
Meters after and near the overpass, you can already see the build-up in the Rosario area
The Rosario bridge area is usually congested not just because of the PUV operations but also because there is the junction of Ortigas Avenue Extension and Amang Rodriguez Avenue, which is another major thoroughfare connecting this area to other parts of Pasig, Quezon City and Marikina City.
I will post about the counterflow scheme in Bangkok in the next post.
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On kamote riders
Much has been written and reported about the so-called ‘kamote’ riders. These are motorcyclists who have the propensity for risky behavior including reckless maneuvers on the road. Such often places them in harm’s way whether they are conscious about the actions or not. I see them everyday during my commutes including but not limited to those who counterflow, speed, race, zig-zag through moving traffic, and use the bicycle lanes or pedestrian sidewalks.
The not so obvious kamote rider positioning himself at the downspout of a concrete mixer.
Not all motorcycle riders are kamote. However, there is a significant number of them out there that put other road users in risky situations. They also contribute to a lot of damage to property as evidenced by a lot of vehicles, especially cars, that have the signature scratches, dinks and dents after being sideswiped or bumped by motorcycles. Such behavior can actually be corrected if the Land Transportation Office (LTO) would be stricter with licensing – requiring more in terms of rider training and certification as well as testing. Traffic law enforcement is also critical here because behavior change can only be done and effective if enforcers are firm. A friend made the observation that law enforcers themselves are the first to violate rules and regulations or bend them in their favor. That sends a wrong signal and would only encourage more ‘pasaway’ and ‘kamote’ riders.
Of course, there are also kamote drivers and cyclists. But those are the topics for future posts.
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Lower speed limits may not slow drivers, a before-and-after study shows
I am sharing this article on drivers not reducing their speeds after speed limits have been lowered along certain roads. My first reaction after reading the article is that it is that perhaps in the US case, the after study was conducted quite early and before people have become aware, understood and adjusted to the lower speed limits. The responses or reactions to lower speed limits (particularly those posted or on signs) may vary among cities and countries. In the Philippines, where drivers and riders appear to be oblivious to speed limits, other interventions may be required including some types of traffic calming devices. This is very much a concern particularly in school zones where children are exposed to the risks of being run over by motor vehicles speeding along the roads and not minding the speed limits in the area.
Here is the Research report:
Source: Lower speed limits may not slow drivers, a before-and-after study shows
Article share: on using optical narrowing to make streets safer
I’m sharing this interesting article on the concept and application of optical narrowing to improve road safety:
Erfurt, E. (September 15, 2023) “How to Use Optical Narrowing to Make a Street Safer,” Strong Towns, https://www.strongtowns.org/journal/2023/9/15/how-to-use-optical-narrowing-to-make-a-street-safer?fbclid=IwAR147sLmkMBwStj51FR1ehNcVsi1YpN70etrpGOwv9DHL4ZhJIDLzP8cb1s [Last accessed: 3/14/2024]
To quote from the article:
“We all perceive the world around us through visual reference points. As we look around, we are next to the wall, or across the street from the bank—in other words, we position ourselves relative to what we see. This is even more apparent when we are driving: you may perceive yourself as behind another car, or between the lines on the road.
Drivers make decisions based on these visual cues. If things are further away, we are more inclined to speed up. The auto industry has marketed this as the “freedom of the open road,” and the visual of a wide open road is paired with the acceleration of the car. If no one is near and all the fixed objects, such as curbs and buildings, are far away, then the perception is that we have less risk and we throw caution to the wind.
If things are closer, we are more inclined to slow down. Our natural inclination is caution and possibly a little bit a fear that we may hit something. When you drive on a street where the lanes are a little narrower, or the buildings are at the back of the sidewalk, our reference points become closer. We have to focus, and in an abundance of caution we drive slower. The perspective is that we have more risk, and we pay more attention to counter that risk.”
This would be a good quick reference to planners and engineers who are involved in road safety, particularly in applying complete streets concepts to reduce the risk of crashes along streets.
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