Podcast
Questions and Answers
What should be minimized to keep the work done on hill roads as low as possible?
What should be minimized to keep the work done on hill roads as low as possible?
What distinguishes expressways from regular arterial highways?
What distinguishes expressways from regular arterial highways?
What should be avoided when aligning hill roads to prevent instability issues?
What should be avoided when aligning hill roads to prevent instability issues?
What is the primary goal of an economical highway alignment?
What is the primary goal of an economical highway alignment?
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What type of traffic are expressways primarily designed for?
What type of traffic are expressways primarily designed for?
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What is the highest allowable grade (slope) for Tourism Roads?
What is the highest allowable grade (slope) for Tourism Roads?
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What is one potential benefit of Tourism Roads to local communities?
What is one potential benefit of Tourism Roads to local communities?
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Where are municipal roads typically located within a municipality?
Where are municipal roads typically located within a municipality?
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What is the maximum allowable grade (slope) for provincial roads in the Philippines?
What is the maximum allowable grade (slope) for provincial roads in the Philippines?
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How are national roads in the Philippines classified?
How are national roads in the Philippines classified?
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Why are wider medians, ideally 4.50 to 18.50 meters, better for planning intersections and separating traffic in rural areas?
Why are wider medians, ideally 4.50 to 18.50 meters, better for planning intersections and separating traffic in rural areas?
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What does 'superelevation runoff' refer to in road design?
What does 'superelevation runoff' refer to in road design?
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According to the information provided, what is the primary purpose of adequate shoulders on the narrowest highways?
According to the information provided, what is the primary purpose of adequate shoulders on the narrowest highways?
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Which of the following factors should NOT be considered when determining the lane width for 2-lane highways?
Which of the following factors should NOT be considered when determining the lane width for 2-lane highways?
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What is the recommended width range for a climbing lane on a highway with a grade greater than 6%?
What is the recommended width range for a climbing lane on a highway with a grade greater than 6%?
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Which of the following highway types is considered inappropriate as part of an improved highway system in modern highway design practice?
Which of the following highway types is considered inappropriate as part of an improved highway system in modern highway design practice?
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In what type of areas are undivided highways most applicable?
In what type of areas are undivided highways most applicable?
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Where should a climbing lane on a highway with a steep grade typically begin?
Where should a climbing lane on a highway with a steep grade typically begin?
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What is the purpose of using superelevation or banking in road design?
What is the purpose of using superelevation or banking in road design?
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When might narrow shoulder widths be used on 2-lane highways?
When might narrow shoulder widths be used on 2-lane highways?
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Why are climbing lanes typically needed on multilane roads?
Why are climbing lanes typically needed on multilane roads?
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What is the characteristic feature of a divided highway?
What is the characteristic feature of a divided highway?
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What is the standard lane width for 2-lane highways?
What is the standard lane width for 2-lane highways?
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How far should the climbing lane typically extend?
How far should the climbing lane typically extend?
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What is the minimum width of the traveled way for 2-lane national roads in the Philippines?
What is the minimum width of the traveled way for 2-lane national roads in the Philippines?
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Which of the following best describes where provincial roads in the Philippines typically connect to?
Which of the following best describes where provincial roads in the Philippines typically connect to?
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How is a provincial road in the Philippines officially recognized to receive national aid for maintenance?
How is a provincial road in the Philippines officially recognized to receive national aid for maintenance?
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What is the minimum required width of the road right of way for city roads?
What is the minimum required width of the road right of way for city roads?
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What is the highest allowable grade (slope) for city and municipal roads?
What is the highest allowable grade (slope) for city and municipal roads?
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What is the primary purpose of Tourism Roads?
What is the primary purpose of Tourism Roads?
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Study Notes
Highway Design and Classification
- To keep work on hill roads minimal, the grade (slope) should be minimized.
- Expressways are distinguished from regular arterial highways by being primarily designed for high-speed traffic with controlled access points.
Road Alignment and Design
- When aligning hill roads, instability issues can be prevented by avoiding steep grades and sharp curves.
- The primary goal of an economical highway alignment is to minimize construction and maintenance costs while ensuring safety and efficiency.
- Expressways are primarily designed for high-speed traffic.
- The highest allowable grade (slope) for Tourism Roads is 10%.
Road Classification and Characteristics
- Tourism Roads are designed to provide scenic routes and promote tourism, and can bring economic benefits to local communities.
- Municipal roads are typically located within a municipality's boundaries.
- Provincial roads in the Philippines are classified based on their connectivity to national roads and are officially recognized to receive national aid for maintenance through a presidential proclamation.
- Provincial roads typically connect to national roads, city or municipal roads, and other provincial roads.
- The maximum allowable grade (slope) for provincial roads in the Philippines is 12%.
Road Design Features
- Wider medians (4.50 to 18.50 meters) are better for planning intersections and separating traffic in rural areas.
- Superelevation runoff refers to the gradual reduction of superelevation or banking on a curved section of road.
- Adequate shoulders on narrow highways serve as a recovery area for vehicles and provide space for emergency stops.
- The primary purpose of using superelevation or banking in road design is to reduce the risk of skidding and improve safety on curved sections.
Lane Width and Climbing Lanes
- The recommended width range for a climbing lane on a highway with a grade greater than 6% is 3.5 to 4.5 meters.
- Climbing lanes are typically needed on multilane roads to provide an additional lane for slow-moving vehicles on steep grades.
- A climbing lane on a highway with a steep grade typically begins at the start of the steep grade and extends about 1 kilometer beyond the end of the grade.
- The standard lane width for 2-lane highways is 3.0 to 3.3 meters.
- The minimum width of the traveled way for 2-lane national roads in the Philippines is 6.0 meters.
Road Types and Characteristics
- Undivided highways are most applicable in rural areas with low traffic volumes.
- A characteristic feature of a divided highway is a median or barrier separating opposing streams of traffic.
- Provincial roads in the Philippines are officially recognized to receive national aid for maintenance through a presidential proclamation.
- The minimum required width of the road right of way for city roads is 20 meters.
- The highest allowable grade (slope) for city and municipal roads is 10%.
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Description
Test your knowledge on the alignment of hill roads by answering questions about minimizing work, reducing the need for cross drainage structures, and preventing instability issues. Learn about key factors that impact the design of hill road alignments.
