Home » Posts tagged 'traffic signals'
Tag Archives: traffic signals
I took a couple of photos while we were traveling along Espana Boulevard. I wanted new photos of the traffic signals along Espana to use as visuals for my examples whenever I discuss traffic signals and their coordination or synchronization in my lectures.
Green signal for traffic. If the traveler is able to travel at the optimum speed, one will be able to catch the green light at so many intersections along Espana. The road is the major thoroughfare in the area and traffic along it is prioritized over those from the side roads to maximize the throughput along Espana.
If one catches a red light at one intersection, it is possible that the traveler will catch a red light in the next intersection(s).
A friend posted about the current initiatives in the US as they embark on revising their Manual on Uniform Traffic Control Devices (MUTCD). This manual along with AASHTO’s Geometric Design of Highways and Streets and their Highway Capacity Manual are something like the holy trinity for Highway and Traffic Engineers. These are also the main references for our DPWH for the manuals and guidelines we use in traffic and highways.
Here are a couple of articles calling for the revisions to reflect recent designs mainly from NACTO, which itself publishes guidelines for roads to be more inclusive rather than car-centric:
NACTO (May 2021) Modernizing Federal Standards: Making the MUTCD Work for Cities, https://nacto.org/program/modernizing-federal-standards/
NACTO (May 11, 2021) A Blueprint to Update America’s Street Manual, https://nacto.org/2021/05/11/a-blueprint-to-update-americas-street-manual/
We don’t have to pattern revisions after the MUTCD but then that requires that the DPWH through its Bureau of Research and Standards (DPWH-BRS) do its part in compiling, reviewing, studying and adopting materials from various countries, and developing suitable standards and guidelines for roads in the Philippines. Do they have to reinvent the wheel? Not so and they can still refer to the US manuals as long as again these are localised for our conditions and situations.
There are two important international conventions or agreements that the Philippines is a signatory to. These are the
Vienna Convention on Road Traffic (November 8, 1968):
and the Vienna Convention on Road Signs and Signals (November 8, 1968):
These are important as signatories are bound but the agreements on road traffic rules and regulations and standard signs and signal. I included the links to each agreement as they also include the exceptions taken by different countries such as Thailand and Vietnam declaring they will not be bound by Article 44, choosing to classify mopeds as motorcycles. Apparently, the Philippines did not declare exceptions or objections to any of the articles.
The Barkadahan Bridge is currently undergoing rehabilitation. To be accurate, the old bridge is being rehabilitated and upgraded/retrofitted to be able to carry the traffic projected to use it being a vital link between the Province of Rizal and Metro Manila via Pasig and the C-6 corridor. The bridge is named after the “friendship” established among Rizal municipalities and Pasig City for an area that has been subject of a territorial dispute among them. These are the municipalities of Cainta and Taytay (Rizal Province) and the city of Pasig. The bridge spans the Manggahan Floodway, much of which is in Pasig City.
To increase the capacity for this crossing, which is the most direct route to C-6 and popular among many headed to Taguig/BGC and Makati, a new bridge had been constructed to the south of the old one. The older one had 2 traffic lanes and was no longer sufficient for the volume of vehicles crossing it after the expansion of C-6 resulting to it steadily gaining more users over the years. Use of this route cut down travel times between Rizal and BGC and Makati by at least 30 minutes based on our experiences using the route.
Late last year as far as I could recall, the new bridge opened and immediately increased capacity but then congestion quickly set-in due to two factors: the traffic management at the intersection with the East Bank Road and the constrained (two-lane, two-way) leg of Highway 2000. Add to this the lack of discipline by local traffic in the form of tricycles and motorcycles counter-flowing in the area.
Earlier this year, signs were posted around Rizal about the then impending project for the rehabilitation of the old bridge. The signs advised for most travellers to avoid using the Barkadahan Bridge due to the congestion in the area because of the project. It turns out that what was thought by most as a project retrofitting the old bridge alone was actually a bigger one involving increasing the capacity of the Highway 2000 leg of the intersection with the East Bank Road. Following is a photo posted at the official Facebook page of the Rizal Provincial Government showing the demolition of buildings and other structures along the Highway 2000 leg. The photos were taken from the new Barkadahan Bridge approaching the intersection, the southbound direction of the East Bank Road, and from the westbound side of Highway 2000.
Demolition and clearing of ROW for the expansion of Highway 2000 in relation to Barkadahan Bridge [Photo collage from the Lalawigan ng Rizal Facebook page]
From the photos above, it is clear that at least 2 lanes will be added to Highway 2000 and that this leg will soon be well-aligned with the Barkadahan Bridge, which will also have a total of 4 lanes. Hopefully, this project will be completed soon and within the year (before December?) in order to alleviate the commuting woes of Rizalenos working in the BGC and Makati CBD areas. Of course, that goes without saying that there is also a need to optimise the traffic signals at the intersection and to strictly enforce traffic rules and regulations vs. erring motorists in the area.
This will just be a quick post for now and I just wanted to share a few recent articles on transport and traffic from a favourite magazine – Wired:
These are very well written, easy to understand articles on things we encounter everyday (traffic congestion, traffic signals at intersections) and when we travel long distance (airports). They show different perspectives of things we take for granted or assume we understand. An example of the latter includes notions that road widening or road construction will solve traffic congestion problems. Much of what goes around regarding road widening or road construction as solutions do not account for induced demand, which is basically additional traffic generated or encouraged by wider or new roads. The second article talks about Changi Airport, arguably the best in the world, and the high tech approaches they have employed or will employ in order to ensure efficient operations there. Such tools, I think, should be used in our airports especially NAIA where the long standing excuse is the limitations of the runway(s) and the airport terminals. Certainly, there are other issues that need to be addressed and going high tech and employing sophisticated methods for airport operations should alleviate problems until we ultimately build a new airport elsewhere. The third article takes a look into behaviour and mentions a “social contract” we have agreed to in order to reduce mayhem in our roads. This “social contract” as well as others related to it should be revisited and understood as they are very much a part of how we behave when we travel and have a significant effect on others around us.