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Category Archives: Highway Engineering
Solar road studs for Ortigas Avenue Extension bike lanes
The bike lanes along Ortigas Avenue Extension now have solar road studs for these to be more visible at night time or when it is dark. Following are photos of the bike lanes at night.
While the studs enhance the visibility of the bike lanes and perhaps also the safety of cyclists, the latter is not assured. The bike lanes are not protected and physical barriers like those installed along Quezon City roads are most effective in ensuring the safety of cyclists against motor vehicles. The solar studs do not deter motor vehicle drivers from encroaching on the bike lanes so they appear to have minimal impacts on safety.
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Article share: on making roads greener
I came upon this article on ‘greening’ roads:
Goldfarb, G. (December 23, 2023) “This Radical Plan to Make Roads Greener Actually Works,” Wired, https://www.wired.com/story/this-radical-plan-to-make-roads-greener-actually-works/?bxid=5bd6761b3f92a41245dde413&cndid=37243643&esrc=AUTO_OTHER&source=Email_0_EDT_WIR_NEWSLETTER_0_DAILY_ZZ&utm_brand=wired&utm_campaign=aud-dev&utm_content=WIR_Daily_010324&utm_mailing=WIR_Daily_010324&utm_medium=email&utm_source=nl&utm_term=P8 [Last accessed: 1/4/2024]
To quote from the article:
“The very notion that a road can be “green” seems oxymoronic: A vast body of scientific literature demonstrates that roads befoul air and water, fragment ecosystems, introduce non-native species, and obliterate wildlife.”
That was a pretty damning or severe statement about roads considering such infrastructure are necessities in today’s world. Perhaps we should revisit road planning and design to address these issues referred to. Aside from that quote, the article related a number of good examples worth replicating. In fact, I recall that many Philippine roads were envisioned, even designed, to have greenery along them. The tragedy is when the DPWH and LGUs departed or deviated from these plans. The road widening projects of the past years are examples on how national and local agencies have proven the article’s author right about green roads being oxymoronic.
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Speeding, road crashes and nuts behind the wheel
A recent road crash involving a car slamming into a truck along Marcos Highway in Antipolo City highlights one of the main concerns affecting road safety in the Philippines – speeding. Video from a CCTV camera installed at an establishment near the crash site showed a truck making a U-turn and doing it correctly (i.e., the maneuver) and safely. What followed was a car that was obviously speeding but seemingly not out of control. The car slammed the back of the truck in what was a fatal and tragic crash.
Are the roads to blame? While roads and bridges are static, design elements are the main culprits for why these facilities can be unsafe to users. Straight, level and wide sections of roads invite speeding among drivers and riders alike. The so-called ‘ideal’ sections of roads encourage drivers and riders to speed up, regardless of the speed limits. Thus, roads like Commonwealth Avenue in Quezon City and Marcos Highway in Antipolo, Cainta, Marikina and Pasig have many speeding vehicles. The design speeds for these roads are definitely above the speed limits. I still maintain though that it takes two to tango. That is, even with the above conditions, disciplined, experienced drivers and riders should not have been speeding or doing any other risky maneuver. That could have reduced the likelihood of such crashes. I think that’s pretty plain and common sense.
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Bike lanes along Ortigas Avenue Extension, Cainta, Rizal
The bike lanes along Ortigas Avenue end at the border of Pasig City and Cainta (or Metro Manila and the Province of Rizal). This is just after SM East Ortigas if you are eastbound, headed towards Cainta Junction. Last Friday, I was able to take a photo of the newly painted bike lane along Ortigas Avenue Extension’s eastbound side but which starts just after Cainta Junction across from the main gate of Brookside Hills Subdivision.
The new bike lane along Ortigas Avenue Extension used luminous paint, which makes it glow at night especially when exposed to vehicle headlights.
There have been bike lanes in Rizal prior to this development. Marcos Highway and Sumulong Highway have painted bike lanes. The Manila East Road from Tikling Junction also has bike lanes. This ‘missing link’ between the boundary of NCR and Rizal and Tikling is long overdue. Hopefully, this will encourage more active transport users particularly from “bike to work” and “bike to school” trips.
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Central Luzon Link Expressway (CLLEx)
The recently opened Central Luzon Link Expressway (CLLEx) is a freeway spanning the provinces of Tarlac and Nueva Ecija towards the Cagayan Valley side of Luzon. With the ends at Tarlac City, Tarlac and San Jose City, Nueva Ecija, Phase 1 currently terminates at Aliaga town; connecting to the Guimba-Aliaga Road. That is 18 kilometers of the planned 30.7 kilometers of the first phase, which is to end at Cabanatuan City, Nueva Ecija. Here are some photos taken by colleagues as they traveled to Tuguegarao this weekend.
Section of SCTEX leading to the junction where the road branches to either the TPLEX or the CLLEx. SCTEX is a tollway operated by Metro Pacific via its Manila North Tollways Corp. while TPLEX is a tollway operated by San Miguel Corp. CLLEx is currently a freeway under the DPWH.
SCTEX off-ramps to CLLEx (left) or Tarlac City (right)
The expressway currently has 2 lanes per direction plus shoulder along either direction. The median barrier is a post & rail semi-rigid structure.
Many of the traffic signs have yet to be installed
Not so much traffic along the freeway as shown in the photos. These were taken on a Sunday though and we wonder if there will be more vehicles during the weekdays.
As the freeway is still uncompleted, the end section in Nueva Ecija is two lane-two way with only cones and bollards separating opposing traffic.
Exit ramp towards the Guimba-Aliaga Road
There are no stops yet along the freeway. I am not aware if there is a timetable for it to become a tollway. Traffic is still quite low so perhaps making it a tollway will take some time as it might be difficult to have a profitable operation. It would be good to have it as a limited access freeway to establish demand and use for the road.
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Why do we keep widening roads?
I’m just going to share this article here. The article from The NY Times asks a question that has been bugging planners and engineers, particularly those who are in government and perhaps under the agencies like the DPWH, DOTr and NEDA. This also applies to planners, engineers and those from other disciplines involved in transportation infrastructure development and particularly roads or highways.
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On intersection treatments for bicycles
With the increasing popularity of bicycles as a mode of transport particularly for commuting (e.g., bike-to-work, bike-to-school), we should be redesigning our intersections to include elements essential for the safety of all users, whether on motorized or non-motorized modes. Here is a short but very informative article on how a simple intersection treatment can significantly improve safety for everyone especially cyclists and pedestrians:
Grief, N. (December 2, 2022) “How Green Paint Can Save Cyclists’ Lives,” Bicycling.com, https://www.bicycling.com/news/a42124210/bike-boxes-intersections/ [Last accessed: 12/3/2022]
To quote from the article:
“A bike box, on the other hand, seems to be the ideal middle ground and the option of the three that these researchers recommend. Cyclists feel more comfortable when compared to the free-for-all of a mixing zone because they have a designated area to be and they’re out ahead of vehicles, but according to the eye movement analysis, they remain alert and watchful for vehicles.”
Here are a couple of drawings showing bike boxes at intersections from the recent Bike Lanes Master Plan for Metro Manila, Metro Cebu and Metro Davao that was developed by DOTr with assistance from the UNDP:
Bike boxes on a typical three-leg intersection (DOTr and UNDP, 2022)
Bike boxes on a typical four-leg intersection (DOTr and UNDP, 2022)
The preceding drawings adhere to the DPWH design guidelines that mainly follow AASHTO Guidelines. Of course, there are other design references such as NACTO and the manuals of other countries (e.g., Netherlands, Australia, Singapore, etc.) were the best practice designs can be adopted for local applications.
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On emergency vehicles, speeds and road widths
I recall an online discussion about how roads need to be wide to accommodate emergency vehicles such as fire trucks/engines, ambulances and police vehicles. There are also videos shared on social media about how, with wide roads, motorists could move their vehicles to the sides to give way to emergency vehicles. These are used to support the argument that we need wide roads and that speeding for emergency vehicles is justified because of their purpose. The following article attempts to make a counter-argument:
Lewis, M. (November 21, 2022) “Ambulances vs. Pedestrians,” Planetizen, https://www.planetizen.com/blogs/119785-ambulances-vs-pedestrians [Last accessed: 11/24/2022]
To quote from the article:
“the “emergency response” argument in favor of wide streets only makes sense if the risk of death from a too-slow ambulance outweighs the risk of death from a speeding car.”
Certainly, the data on road crashes due to speeding should support the perception that there’s a higher risk of death from speeding vehicles compared to the risk of dying in relation to the emergency that’s supposedly being responded to. And in our country, perhaps this counter-argument is valid considering the “wang-wang” type of emergency vehicles moving about.
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The wide Roman Highway, Bataan
As it is National Heroes Day today, I thought it would be nice to feature a road in an area that witnessed the experiences and sacrifices of many heroes. I traveled to Bataan last July and took some photos of the roads there including the Roman Highway, which is the main corridor connecting many of the province’s major towns. Also called the Roman Superhighway, the highway originally had 2 lanes (bi-directional and undivided) with shoulders along both side of the road. Eventually, it was widened and extended to 4 lanes (2 per direction) with wide shoulders. The current Roman Highway has been expanded to 6 lanes with shoulders but for most parts appear to effectively have only 4 lanes and paved shoulders.
The wide Roman Highway does not carry much vehicular traffic
The road widening is not complete as most bridges have not been widened. These produce bottlenecks like the one in the photo where the additional lane is effectively relegated to a shoulder.
The highway is practically straight but presents many examples of sags and crests. For those into highway engineering, images like the ones I share in this post are textbook examples for sight distance topics.
Another sag vertical curve with a bridge near or at the lowest point in the sag. Again, notice that the additional lanes are currently discontinuous at the bridge and there’s a barrier (orange) to warn motorists and guide them back to the original carriageway.
The highway is used by many trucks as there are industrial centers located along the highway including the PNOC in Limay and what used to be called the Bataan Export Processing Zone (BEPZ now the Bataan Freeport) at the end of the highway in Mariveles.
The widening of the Roman Highway includes the addition of one lane per direction and a narrow shoulder just before the sidewalks. The shoulder could easily be configured into a bike lane but that third lane can easily be designated for bicycles considering the traffic is usually light at most sections of the highway.
A section where the bridge has already been widened features 3 wide lanes per direction. The shoulders are still there but are not included in the bridge.
LGUs are joining the No-Contact Apprehension bandwagon
Another view of the wide highway
More on Bataan roads in a future post. I also took photos of the Gov. J.J. Linao National Road (Pilar – Bagac Road), which is the main access road to the Mt. Samat Shrine.
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On asphalt overlays and opportunities to rationalize pavement markings
Entire road sections along my commuting routes have had recent asphalt overlays or are being prepared for it. This is part of the national government’s regular maintenance program for roads implemented by the Department of Public Works and Highways (DPWH).
Newly asphalted pavement along the eastbound section of Ortigas Avenue Extension – can you guess how many lanes will fit here?
The previous photo was taken one week ago. This is what the section looks like after the contractor restored the pavement markings. I say restore because these are practically the same 3 lanes prior to the asphalt overlay to the rigid pavement structure.
Pavement marking delineating the traffic lanes, median and gutter
I wonder if the DPWH included bike lanes when they contacted the asphalt overlay and pavement markings for this road. There was none before and the new overlay presented a blank slate to which Class III bike lanes could at least have been provided. There is already an increasing number of bike-to-work traffic along Ortigas Ave. Ext. and the Manila East Road, which connects the large towns of Rizal and serves as one of the major arterials connecting the Province of Rizal to Metro Manila (the other being Marcos Highway).
Asphalt overlays like this provide opportunities to rationalize road space through adjustments to the pavement markings. Granted that there’s significant bus and truck traffic along this road, it is still possible to allocate or at least delineate 1.5m to 2m for cyclists. That should also help in making motorists aware of bike traffic and in the long run influence behavior towards safer travels for all road users.
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Caught (up) in traffic 