Home » Bridges (Page 4)
Category Archives: Bridges
Metro Manila Skybridge: for cars or bicycles?
I was browsing over a not so old, pre-election issue of Top Gear magazine and came upon an article that featured then Senatorial candidate and already former Metro Manila Development Authority (MMDA) Chair Francis Tolentino. The article stated the former MMDA Chair’s frustration that his pet project didn’t get approval from NEDA. The Skybridge he was proposing was basically an elevated road that was to be built on top of Metro Manila rivers. This is in part to save on RROW costs and supposedly to also reduce traffic impacts of construction (note the traffic congestion due to the Skyway Stage 3 construction).
I think that such a Skybridge could have had a positive impact on traffic congestion but for a short time only. The sheer number of vehicles in Metro Manila will only lead to congestion elsewhere being transferred here and, under equilibrium conditions that will eventually be attained as some time in the near future, will ultimately be congested. The concept of tollways is for people to pay for the use of a facility in return for high level of service (read: faster travel). Skyways and other elevated highways cost a lot and the NEDA probably didn’t see a free use elevated structure like the Skybridge having much in terms of ROI.
There is, however, something that may be worth it in terms of potential congestion reduction as well as enhancement of traffic safety and quality of life – a Skybridge for bicycles and pedestrians. This should encourage people to cycle as travel via such mode will be much safer and could possibly be faster. Friends and acquaintances who are cyclists often post about similar facilities in Europe and how these are able to reduce congestion as people opt to cycle and leave their cars at home during the weekdays.
–
Throwback to 1995 – Baguio flyover
Baguio retains a special place in me as it is where I did my first out of town project back in 1995. This was just after I finished my master’s at UP Diliman. The project was Baguio’s first flyover or overpass and it was being proposed along Bokawkan Road, which is then as now a very busy thoroughfare connecting the city to La Trinidad, the capital town of Benguet province. Our task was to determine the best configuration for the flyover including the required capacity for it and the remain at-grade roads once it was built.
I remember it was very rainy when we were there and our accommodations (which was volunteered by our client – their family’s vacation house in the city) turned out to be quite inhospitable. We had to buy blankets and make our own beds as we had practically no budget to stay at a hotel. I recall the house was a bit creepy especially for the last few days I stayed there by myself (my mentor had to go back to Manila) to supervise the traffic surveys at the proposed site of the flyover. That was quite the adventure for me then as I also tried to explore the city on foot. I walked the entire stretch of Session Road when it was still the Session Road (old) people reminisce about. I also walked around neighborhoods in the Gen. Luna area where the house I was staying at was located.
Here are some photos of the flyover now and the area where I supervised traffic surveys together with the bridge engineer who was from Baguio.
The flyover as seen from one of the side streets in the Trancoville district.
A closer look at this almost 20-year structure.
Traveling along the service road along the flyover and towards the direction of La Trinidad. Shown also in the photo is one of the pedestrian overpasses in the city. I actually like the architecture of these overpasses that seems more apt compared to Metro Manila’s steel structures.
I included this photo past the overpass to show how crowded Baguio is already with houses having replaced trees in many mountains and hills. These used to be all green with trees back in the 1990s with only a few shanties that had started to sprout back then. I have other photos of such scenes of houses growing out of the mountains around the city and will share those in another post soon. Such have become the representation of unsustainable development for a city that has become overcrowded and yet continue to attract many people who eventually become residents.
–
Minimum vertical clearance for railway, flyover, bridge and footbridge structures
Further to the discussion in the last post, the Department of Public Works and Highways (DPWH) recently came out with a Department Order providing a guide for minimum vertical clearance for railway, flyover, bridge and footbridge structures. A PDF of the DO may be found in the following link:
Department Order_No. 53_ Series of 2016
Of course, the DPWH Department Order No. 53 Series of 2016 may be found and downloaded directly at their website. Here’s a figure from the DO:
–
LRT Line 2 issues: elevated tracks vs pedestrian overpasses
The ongoing construction of the LRT Line 2 Extension has reached a point where it is clear that several pedestrian overpasses will be affected by the project. Following are photos of overpasses between Angel Tuazon Ave./Felix Ave. and Masinag. Most are clearly along the elevated superstructure of the Line Extension and will have to be redesigned if not removed. Some are relatively new and so brings some questions whether those behind the overpasses coordinated with the proponents of the Line 2 Extension project.
The practically new pedestrian overpass near the Vermont Royale subdivision gate will have to be redesigned to give way to Line 2’s elevated tracks. This is the view along the westbound side of Marcos Highway. Hopefully, the design will not be similar to the somewhat awkward and, some say, ‘people-unfriendly’ designs of overpasses along EDSA due to the MRT 3 tracks.
Here’s a view of the same overpass from the eastbound side of Marcos Highway.
Another overpass that will have to be dismantled from the looks of the columns currently under construction is the one near the Filinvest East gate.
The overpass across from SM Masinag may also have to go but since there will be a stations to be constructed in this area, there is an opportunity to integrate the pedestrian walkway with the elevated station.
I will try to take photos of other overpasses between Santolan and Sta. Lucia that may be affected by the construction of the Line 2 extension. The ones across Robinsons Metro East and De La Paz though might be integrated with the station that is to be constructed in the area. This would be similar to the SM Masinag overpass, which will presumably be integrated with the Masinag Station of the Line 2 extension.
–
The need for basic transport infrastructure
The need for basic transport infrastructure cannot be emphasized more when we see photos or reports on makeshift bridges and very rough roads that many people use for travel between their homes and the places where they work, attend school or to go to markets to sell or purchase items like food. Many people living in rural areas continue to be in poverty because they lack the infrastructure required for them to be productive. Nevermind that most wealth and productivity is in urban areas. Are we encouraging people who don’t have to be in cities to flock to the cities? And who will be left in the farms? To fish? To produce the food that is so vital for everyone? This is actually a delicate system that hangs in the balance if we cannot support rural development as well as we have urban development.
A hanging bridge in Tarlac is basically the only way for people to travel across this river, which swells during the wet season. The span is suspended from two columns at either ends of the bridge where there are makeshift stairs for people to climb unto and off the bridge.
Another view, this time from one end of the hanging bridge shows a crude structure made out of steel cable, reinforcing bars and whatever wood they could use as planks and hand rails. It looks flimsy but they make do with it out of need. We learned that in times when the bridge was destroyed by typhoons, they would rebuild it with little help from the government.
The term “buwis buhay” comes to mind every time I look at these photos and others I have taken of rural roads in Tarlac and other parts of the country. People, especially children and those working hard to care for their families, should not have to risk lives or limbs just so they could go to work or school. Farmers and fishermen should be provided efficient access to markets so as to encourage them to continue in their contribution to food production. And perhaps we should think twice about building expensive white elephants for vainglorious attempts at mega structures especially when we still have a lot to accomplish in basic transport infrastructure.
–
Bridges too far (from being practical)
I am always amused whenever I read or hear news about big bridge projects being proposed by politicians in the Philippines. There is no lack of interest in these types of projects considering the many islands comprising the country. However, at this time and with the urgent demand for other transport infrastructure like access roads (farm to market, tourism, etc.), public transport systems, airports and ports, bridge projects of the “mega”-scale can be considered more as follies than smart investments.
Among the projects I have heard or read about are bridges connecting:
- Cebu and Bohol
- Cebu and Negros (Negros Oriental)
- Panay (Iloilo) and Negros (Negros Occidental)
- Panay (Iloilo), Guimaras and Negros (Negros Occidental)
- Batangas and Mindoro
There is also a bridge proposed to cross the Pangil Bay in Mindanao that has been part of many conversations pertaining to development in Northern Mindanao. These bridges are entirely different in terms of scale and traffic from, say, the proposed third bridge connecting Cebu and Mactan Islands or even the more basic bridges that should have been built many years ago in order for people in rural areas to have direct and safe access to schools, hospitals and workplaces. We see so many images and viral videos of children crossing swollen rivers using make-shift foot bridges, boating or even just walking or swimming across the rivers. Shouldn’t our leaders prioritize these instead of mega bridge projects?
I still have the same questions as before for the proponents of these bridges:
- Are these bridges economically and financially viable?
- What would be the traffic for these bridges?
- Would the money spent for any of these bridges be better allocated for other infrastructure projects in their constituencies?
The first and second questions are often easily answered but it can be argued that traffic forecasts and estimated benefits can be drastically and dramatically increased just so a project is justified. The third one is usually the testy question that, when combined with the first two could be very difficult to answer and explain. Many cities and provinces in the country lack basic transport infrastructure as well as infra for social services (e.g., schools, health centers, hospitals, etc.). And even with health centers, hospitals and schools being built, their facilities and human resources are often less than satisfactory or adequate for the people they are supposed to serve and benefit. These should be on the top of priorities rather than mega bridge projects whose potential benefits will take years, if ever, to actually realize.
–
On jaywalking, overpasses and informal terminals
I had some errands last December and decided to take public transport instead of taking our car and wasting time parking the vehicle. There was significantly less traffic at that time of the year because schools already on Christmas break and everyone else seemed to be on the slow side of the holiday mode (read: not in shopping mode). I needed to cross the wide road that is Quezon Avenue and there was a sign where I usually crossed that it was now prohibited to cross there. I had to take the overpass to get to the other side and to the jeepney stop to board one to get back to the university.
The overpass at the Quezon Ave.-Araneta Ave. intersection is under-utilized. I base this on the several times I’ve used the overpass. Most people prefer to cross at road level, taking advantage of the traffic signal cycle that allows for gaps in the traffic for pedestrians to cross safely. Of course, there are those who cross any time and seem to tempt fate by their behaviour. They seem to tempt also the MMDA traffic enforcers assigned in the area but from what I have observed, enforcement of the “no jaywalking” policy is usually lax or non-existent. People regularly cross at ground level in plain view of traffic enforcers.
A vendor set-up at the corner of the pedestrian overpass at the Quezon Ave.-Araneta Ave. intersection. Obviously, there are few pedestrians using this overpass as most prefer to cross at ground level.
More vendors on the overpass – fortunately, there were few pedestrians using the overpass at the time. Its not the same for other overpasses that are crowded due in part to vendors occupying much of the facility.
The stairs for many overpasses around Metro Manila are a bit on the steep side. That’s generally not okay with senior citizens, children or persons with disabilities.
There is an informal, on-street jeepney terminal right at the foot of the overpass. If you are in a hurry, its best to try to board a jeepney on the second lane as they are more likely to proceed when the approach is given a green light. From my experience, it takes about 2-3 cycles before the “queued” jeepneys finally cross the intersection. It takes that time to at least have several passengers for the jeepneys before it proceeds to cross the intersection. Most passengers here are transferring from jeepneys plying routes along Araneta Ave. There shouldn’t be an informal terminal here and jeepneys occupy 1-2 lanes of the road at a critical point – the intersection approach. This means intersection capacity is significantly affected and many vehicles could not proceed as they are blocked by the jeepneys. Special mention is made of vehicles wanting to make a right turn but have to go through this “gauntlet” of public utility vehicles. Again, there are MMDA enforcers in the area but it seems the jeepneys and the barkers hold sway and likely with the blessing of enforcers. Such situations are commonplace in Metro Manila and many other cities, and contribute to traffic congestion and other problems commuters regularly encounter.
–
Inappropriate designs for pedestrian overpasses
There was a photo that circulated in social media the last two weeks showing electric and telephone cables coming out of the stairs of a steel pedestrian overpass. It was obvious that the people responsible for both the overpass (MMDA) and the cables (power and phone utilities) did not coordinate their work and so people had to risk electrocution to be able to cross the street at what is assumed to be a busy intersection. Such is an example of unsuitable designs and bad implementation of infrastructure projects; in this case, that of a pedestrian facility. There are many other examples of these flawed execution of projects including electric posts in the middle of lanes after road widening projects, short span pedestrian overpasses that are not utilised by people (preferring to cross at ground level) because the road was narrow in the first place. Many are a waste of resources considering they may not have been required in the first place if careful assessment were made about the situation.
The pedestrian overpass under construction at the Masinag junction (photo below) is a good example of what looks like flawed design. The elevated walkway is narrow and is located right at the corners of the intersection. The width is important here because there are many people usually crossing at Masinag and the overpass can become congested for users. The stairs have not yet been constructed but if past designs of overpasses like this is to be considered, the stairs will likely be steep and therefore difficult to use for senior citizens, PWDs and children. Note, too, in the photo that the bridge already obscures part of the traffic signals previously installed at the intersection. This means the lights would have to be reinstalled or transferred so motorists can clearly see the signals.
Pedestrian overpass under construction at the Masinag junction in Antipolo City
My friends at the DOTC tell me that it is only a matter of time before the Line 2 Extension project is bidded out an construction finally goes underway. Depending on the the final design of the line and end station, there might be a need to revisit the pedestrian overpasses along Marcos Highway. Hopefully, they don’t become like the overpasses along EDSA that had to be raised more due to the elevation of the Line 3 facilities including the catenary for the trains. I’m sure there is a suitable design for pedestrian facilities for crossing the wide Marcos Highway. It only requires careful thinking and creative minds to come together to come up with the appropriate facilities.
–
Designing for walking and cycling
There are current discussions regarding the highway and street designs mostly from the perspective of safety. These discussions include those hosted by the academe and those posed as challenges by practitioners, mainly architects with experience designing similar facilities abroad and who are advocating for more people-friendly designs. Such discussions are slowly but steadily gaining traction in the Philippines but has met with some resistance in the form of key persons and agencies not giving due attention to the design challenges being posed that would have implications on planning and design guidelines. That is, the implications of promoting people-friendly designs in our roads will require changes in the National Building Code as well as the Highway Planning Manual of the Department of Public Works and Highways (DPWH). These changes will include standards and specifications for the geometric design of walkways and bikeways integrated into our roads and a departure from the current approach that basically treats pedestrian and cycle facilities as an afterthought to motorways.
I’m posting a few photos I took from a recent visit to Yokohama, Japan, which was my home for 3 years back in the 1990s. Much has changed in Yokohama since I last visited in 2008 but notable are the people friendly transport infrastructure including pedestrian and cycling facilities. Following are photos taken in the Minato Mirai district of the city.
Pedestrian and cycling lanes along the main road of Yokohama’s Minato Mirai district. The tree-lined street provides a conducive environment for walking and cycling.
Depending on how one sees it, Minato Mirai Odori is a 10-lane road with 4 lanes allocated for walking and cycling (i.e., 1 lane each on either side of the lanes for motor vehicles).
Pedestrian bridge connecting Minato Mirai Odori with the World Porters commercial development
A 10-lane bridge with 2 of 5 lanes per direction devoted for walking and cycling. That’s a full lane of at least 3.2 meters allocated for pedestrians and another full lane for cyclists. While it is not shown in the photo, the pedestrian and cycling lanes are efficiently utilized during the peak periods.
–
Luzon Avenue Flyover
The Luzon Avenue flyover spanning the width of Commonwealth Avenue is now open to two way traffic. Previously, only the northbound side was open, allowing vehicles to cross Commonwealth from Tandang Sora Ave./Katipunan Ave. to Luzon Ave. and towards Congressional Avenue. I took a few photos of the flyover and the vicinity of Luzon Avenue en route to NLEX a few days ago.
The Luzon Avenue flyover has a total of 4 lanes, divided by a median island.
The lamp posts indicate a well lighted road during night time. The pedestrian walkways on either side are quite narrow and I think the designers of the flyover could have widened this feature of the facility.
A view of Commonwealth Avenue from the flyover.
Along the other end of the flyover is Luzon Avenue, which has been widened to accommodate the flyover and the at-grade sections connecting to the QMC-bound side of Commonwealth Avenue.
A pedestrian overpass was constructed at the foot of the Luzon Ave. flyover so pedestrians will not cross at this critical part of the flyover when vehicles would typically be picking up speed as they descend (or ascend on the other side) the flyover. There are still construction work along the northbound side of Luzon Avenue.
Luzon Avenue, which is a 6-lane, 2-way road divided by a median, is quite crowded with either side of the road occupied mostly by informal settlers. There is also an informal wet market (talipapa) along the road.
The pavement is elevated compared to the land on either side of the road. There are stores and shops set up by those living along the road.
Side streets are narrow and could probably accommodate only cars or small vehicles like tricycles (also shown in the photo traveling along Luzon Ave.
Some stalls are just along the street like this fruit stand that’s already on the carriageway. The photo also shows a better view of a side street with parked vehicles along one side of the road.
Approach to Congressional Avenue – there is another pedestrian overpass near the junction with Congressional. Note the height of the plant box on the median that is designed to discourage or minimize jaywalking across Luzon Ave.
Water works at the junction of Luzon Ave. and Congressional Ave. Luzon Ave. continues as a narrow 2-lane street towards the direction of Bgy. Holy Spirit.
–
Caught (up) in traffic 