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Saturday, October 29
Reflections
Friday, July 8
NCTS’ First Offering of Traffic Impact Assessment for Technical Evaluators
The University of the Philippines National Center for Transportation Studies had a “soft” first offering of their course on Traffic Impact Assessment (TIA) last July 5-7, 2011 in Toyota Training Room, UP NCTS, Diliman, Quezon City.
“Soft” in the sense that there were few participants joined by one from Bayauan representing Visayas, three for General Santos City representing Mindanao and the rest from different parts of Luzon such as Bulacan, Laguna and cities within Metro Manila. The participants were members from the traffic management division of most Local Government Units (LGUs). They are the evaluators from the city or LGU side before a proponent could push through with any project. They are the evaluators who give building permits or certificate of occupancy to developers or would-be businesses ib their locale.
Some of them may be reluctant on attending this course but towards the end of the three-day event, a more enlightened faces can be seen in them. It is through more knowledge about TIA could they be truly empowered to be effective in their roles and responsibilities in their respective cities. As they say, “Knowledge is power.”
On the third day, a participant asked Dr. Cal this question: “What are or should be our next steps as we go back to our provinces and cities? Because at this moment I or may be most of us seem to be lost on what to do after this enlightening course. We have learned or we were equipped now about TIA but what are to be expected from us as we head home?”
Dr. Cal then challenged them to convince their superiors or mayors to come up with city ordinance on TIA, be more proactive by sharing what they learned to their neighboring cities, and to apply what they learned in their practice.
What is TIA?
TIA stands for Traffic Impact Asssessment. TIA is an evaluation of the potential effects that a particular development’s traffic will have on the transportation network in its impact area.
Importance of TIA
There is a need to assess proposed developments in terms of their tranport impacts on the area and the environment in general. TIA is essential because of the significance of traffic generated by proposed developments which can be identified in advance and future imppacts can be planned for.
Principal Goals of a TIA Study
· To identify the transport and traffic impacts of a particular development project
· To assess and analyze these impacts and
· To identify the mitigating measures to address these traffic impacts
Reference: Lecture Notes from Dr. Crispin Emmanuel D. Diaz, UP SURP, during the NCTS’ first offering of Traffic Impact Assessment for Technical Evaluators, June 5-7, 2011, UP NCTS, Diliman, Quezon City
Tuesday, July 5
One bad waiting day
Sunday, July 3
The ills of public transport
Sunday, May 15
Idling but Productively
Tuesday, March 8
NLEX Bocaue Barrieer Toll Fees 02/05/2011
NLEX Bocaue Barrieer Toll Fees 02/05/2011
CLOSED AND OPEN SYSTEMS
Origin | Class 1 | Class 2 | Class 3 |
Tabang | 72 | 180 | 216 |
Sta. Rita | 76 | 188 | 226 |
Pulilan | 92 | 229 | 274 |
San Simon | 119 | 298 | 357 |
San Fernando | 141 | 351 | 421 |
Mexico | 157 | 393 | 471 |
Angeles | 177 | 443 | 531 |
Dau | 195 | 486 | 583 |
Monday, March 7
SCTEX Mabalacat Toll Fees 02/05/2011
Origin | Class 1 | Class 2 | Class 3 |
Tipo | 150 | 299 | 449 |
Dinalupihan | 118 | 236 | 353 |
Floridablanca | 68 | 136 | 204 |
Porac | 32 | 64 | 95 |
Clark South | 4 | 9 | 13 |
Clark North B | 11 | 22 | 33 |
Concepcion | 43 | 85 | 128 |
San Miguel | 80 | 160 | 240 |
Tarlac | 93 | 186 | 279 |
Sunday, February 27
Road Trip to Subic
After more than two hours, our group reached Subic Bay and we began scouting for resorts ideal for wedding venue. There were a lot to choose from but the couple's budget is the biggest determining factor. So we let them have their pick. Seeing the couple being expectant and hopeful of all things give much joy to me. Truly, it is a wonderful hope for the fulfillment of their vows soon. The picture below shows one of the best views we enjoyed while visiting possible venues. Finally, the couple has chosen a place for their wedding by the beach come May. Sorry, no photos will be posted about this venue because they wanted it to be a surprise for most friends and family members.
Then, we had our lunch before going back to QC. No, we actually headed to Intramuros! We toured Fort Santiago and had our own “reception” dinner while our couple friends attended a wedding. We waited for them and finally we had coffee to end the day. It was a very long day but my favorite road trip so far! J
Thursday, February 17
Post Valentine Note on Love (Yes, LOVE!)
Friday, February 11
Thursdays: Traffic Engineering Terms
Thursdays of the week is the time to enrich your knowledge in traffic engineering. The following definitions of traffic engineering terms were taken from Dr. Ricardo Sigua in his book Fundamentals of Traffic Engineering published by the University of the Philippines Press in 2008. The terms are quoted below:
“Density – the number of vehicles in a given length of road at an instant point in time.
Design speed – the maximum safe speed that can be maintained over a specified section of highway when conditions are so favorable that the design features of the highway govern.
Dijkstra’s algorithm – a procedure used in route assignment stage of the four-step model to determine the shortest path from one node of the network to another.
Diplomatic vehicles – motor vehicles owned by a foreign government or by their diplomatic officials in the Philippines.
Disaggregate choice model – a method used for determining modal split, which assumes that a person will use a particular mode with maximum utility for him.
ETC – Electronic Toll Collection; an ITS application
Expressway – a major divided highway designed for high-speed travel, having few or no intersections; also called freeway or limited access highway.”
Other terms will be posted next week. So, wait and learn more.
Thursday, February 3
Thursdays: Traffic Engineering Terms
“Channelization – geometric improvement normally applied at intersections to simplify movements of vehicles to lead drivers to face one conflict at a time.
Clearance interval – the sum of yellow and all-red period in between phases.
Clotoid – a spiral that serves as a transition path as the vehicle enters or leaves a circular curve.
Compound curve – a two-arc simple curve having its centers on the same side of the common tangent.
Cordon counts – counts used to determine the number of vehicles and/or persons entering and leaving an enclosed area.
Crest vertical curve – a vertical curve with the parabolic curve drawn below the two tangents.
Critical gap – describes the minimum gaps needed by drivers of minor road vehicles.
Cycle – one complete indication of green, yellow, and red signals.
D/D/l – a sing-server queuing system with regularity of both arrivals and departures.
Delineators – small reflective panels or buttons mounted on guide posts or guard fences as an effective aid for night driving.”
Other terms will be posted next week. So, wait and learn more.
Sunday, January 30
Commonwealth Avenue “Killer Highway”
The Commonwealth Avenue has been tagged as “The Killer Highway” for quite some time because of the greatest number of road crashes among motorists as well as pedestrians resulting to remarkable number of deaths that happen along this corridor. 24 January 2010 Monday, however, marked the start of the MMDA campaign to introduce some traffic regulations and monitoring to improve and lessen the number of road accidents in Commonwealth Avenue.
Prior to the campaign, Commonwealth Avenue is a 9-lane wide and very long stretch of corridor where vehicles are free to move, swerve, and travel at desired speeds. There were few designated bus/jeepney stops, pedestrian overpass, and several u-turn slots which were not strictly followed by road users. Notable accidents that have occured involved motorcycles, buses, private cars and jaywalkers run over by vehicles. It is important to note that the high occurence of road accidents here may be due to lack of traffic regulations and monitoring on the part of concerned government agencies, lack of discipline among motorists, inadeaquacy in the physical design and signages of the road, and several other factors.
The MMDA, this week, introduced several changes both in the physical design and traffic regulation, monitoring and management. The physical improvements include a yellow lane on the two outermost lanes designated for PUVs/PUJs, the five middle lanes are for private cars and the two innermost lanes will be used to access the U-turn slots. A speed limit of 60kph was also imposed for the motorists. Several traffic enforcers using speed guns were assigned at certain parts of the corridor to monitor and apprehend overspeeding motorists.
It is hoped that through these improvements the Commonwealth Avenue will no longer be tagged as the killer highway. Yet better and safer road environment will only be achieved when the motorists comply and whole-heartedly follow the traffic rules and regulations, the MMDA, with utmost integrity, would maintain good physical design with adequate signages and continue in its traffic monitoring and implementation, and the pedestrians will only use the pedestrian overpass in crossing the highway. Assessments should also be done six months or a year after the implementation to measure the effectiveness of the changes introduced.
Would the improvements really change the nickname, “killer highway,” to something like “safest highway”? It is surely worth noting in the future what Commonwealth Avenue had become when all stakeholders actively have taken part to make it better and safer road corridor. Till the next post on Commonwealth Avenue!
Thursday, January 27
Thursdays: Traffic Engineering Terms
Thursdays of the week is the time to enrich your knowledge in traffic engineering. The following definitions of traffic engineering terms were taken from Dr. Ricardo Sigua in his book Fundamentals of Traffic Engineering, as such, they are quoted below.
"AADT – annual average daily traffic; it is estimated as the total volume counted over one year divided by the number of days in the year.
ADT – average daily traffic; obtained by averaging traffic volume over a number of days at least 2 days and less than 365 days.
Blackspots – hazardous or accident-prone locations.
Broken back curve – a curve characterized by a short tangent between two subcurves in the same direction.
Capacity – the maximum hourly rate at which persons or vehicles can reasonably be expected to traverse a point or uniform section of a lane or roadway during a given time period under prevailing roadway, traffic, and control conditions."
Other terms will be posted next week. So, wait and learn more!
Tuesday, January 25
Jr./Traffic Engineer or Jr./Transport Planner at Parsons Brinckerhoff Philippines, Inc.
Traffic Engineer / Transport Planner Human Resource Department Jr. Traffic Engineer / Jr. Transport Planner |
Sunday, January 23
SLEX Toll Rates at Nichols Gate (01/23/2011)
Wednesday, January 19
Macababbad and Regidor. GPS-Based Travel Time and Delay Survey Methodology and Traffic Data Analysis.
Abstract taken directly from texts and as such, quoted below:
"Travel time and delay studies are used to evaluate traffic conditions, determine levels of service and to plan for improvements. Transportation planners and engineers of the Metro Manila Development Authority (MMDA) still employ the manual or stop watch method using a test car in obtaining travel time and delay data. This method is labor intensive and is prone to human errors as well as biases inherent in the conduct of the field surveys. Thus, it is necessary to develop and demonstrate a more efficient method using tools for assessment of road traffic conditions. This paper presents a Geographical Positioning System (GPS)-based travel time and delay survey and data analysis methodology. It presents the development and application of a methodological framework and also data analysis and presentation through the use of digital maps. The use of GPS in this research provides fundamental inputs towards the development of a probe car system for use in travel time and delay studies in the Philippine cities."
Tuesday, January 18
9th EASTS Conference
Thursday, January 13
Lim, Abesamis, Miranda, Chua and Lee. Generating Trip Plans Using Public Transportation Routes
Abstract taken directly from texts and as such, quoted below:
“It is not simple to travel in a city because of the new routes being followed, new buuildings or landmarks being established, and new roads being constructed. Moreover, commuting or travelling using public utility vehicles is complicated especially in Philippine cities like Manila and Quezon City. This paper talks about iTour, a web-based applications that can generate routes and trip plans from a source to multiple destinations.”
This research is also practical though more information should be inputted in the database for it to fully function as intended for route generation and trip planning. The system would be more useful if it will be set up in the web for everyone to utilize it for free.
Tuesday, January 11
Lai, Leong, Ortuoste, Yu and Ong. Vision-based Intelligent System for Traffic Analysis (VISTA).
Abstract taken directly from texts and as such, quoted below:
“Vision-based Intelligent System for Traffic Analysis (VISTA) is a computer-based vision system that captures video footages of roads for analysis of traffic parameters. Problems with existing technology have led researchers to venture into the use of computer vision. VISTA consists of a dadta acquisition, data processing and result generation modules. The input of the system is a video footage of a roadway taken with a still digital video camera. The input is then converted into an image sequence. Each image is then processed to segregate entities on the road that contribute to traffic from those that do not. Once these entities are identified, pertinent traffic parameters are then computed based on the image sequence. The output of the system can be used as the necessary traffic parameters for traffic management and information systems.
This paper presents the design and implementation of the Codebook sub-module, which is responsible for segregating foreground and background segments of an image. It also outlines performance analysis and evaluation of the sub-module.”
This is one of the good researches that will surely help improve traffic data collection through the use of video cameras and computers. A lot of video image processors for traffic analysis are already being used in other countries. This, however, is locally developed and thus, local application would be much easier, cheaper, and appropriate.
On a note, errors are inherent from devices or personnel performing the data collection. Thus, the system errors present for VISTA is normal. In the conducted on-road object tests, the obtained error can be factored in the traffic flow computations such that more accurate estimates can be achieved.
In the advent of increasing use of surveillance cameras in most cities in Metro Manila, it would be much more wise to include the capabilities of VISTA to maximize the benefits that can be obtained from these. Giving attention to the critical issues of VISTA also would further ensure the accuracy of traffic flow computations. As a transport expert, I highly commend the researchers for producing a practical and valuable tool for traffic analysis to address traffic congestion in the metropolis. This tool should be explored by the MMDA for their real-time traffic surveillance in order to improve the agency’s traffic management and operations.