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Related Concept Videos

Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

150
Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
150
Introduction to Vertical Curves01:24

Introduction to Vertical Curves

219
Vertical curves are parabolic transitions that connect different grades on highways and railroads, ensuring a smooth alignment between back and forward tangents. The back tangent represents the initial grade, while the forward tangent defines the subsequent grade. These curves can be symmetrical, with equal tangent lengths, or nonsymmetrical, with varying lengths. The key points defining a vertical curve include the Point of Vertical Intersection (P.V.I.), where the tangents meet; the Point of...
219
Vertical Curve: Problem Solving01:23

Vertical Curve: Problem Solving

211
Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
211
Introduction to Horizontal Curves01:19

Introduction to Horizontal Curves

296
Horizontal curves are essential in highway and railroad design, ensuring smooth and safe transitions between straight path segments, or tangents. These curves allow vehicles to maintain speed without abrupt changes, minimizing accidents and improving travel efficiency.A horizontal curve is typically defined by its geometric relationship to two tangents that meet at an intersection point (P.I.), where a simple curve is introduced to connect them. The back tangent refers to the initial tangent...
296
Elevation of Intermediate Points on Vertical Curves01:20

Elevation of Intermediate Points on Vertical Curves

91
Vertical curves are essential in roadway design because they provide smooth transitions between varying roadway grades. Designing vertical curves involves calculating intermediate elevations and identifying the curve's highest or lowest point, which is essential for optimal roadway performance.Intermediate elevations on a vertical curve are determined using the tangent offset method. This method considers the initial elevation at the start of the curve, the grades, and the curve's geometry. The...
91
Masonry Paving01:21

Masonry Paving

315
The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
315

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Related Experiment Video

Updated: Oct 14, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

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The Curb Cut.

Kedar S Mate1,2,3

  • 1Institute for Healthcare Improvement, Boston, MA.

American Journal of Medical Quality : the Official Journal of the American College of Medical Quality
|November 1, 2021
PubMed
Summary
This summary is machine-generated.

The COVID-19 crisis revealed health system weaknesses. Targeted universalism offers a path to better health equity by addressing systemic disadvantages for all.

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Area of Science:

  • Public Health
  • Health Systems Research
  • Health Equity Studies

Background:

  • The COVID-19 pandemic exposed significant deficiencies in global health systems, including fragmentation, inequities, and a false dichotomy between economic prosperity and public health.
  • These systemic issues were exacerbated by isolation and a lack of coordination among individuals and institutions.

Purpose of the Study:

  • To propose targeted universalism as a strategic framework for rebuilding health systems post-pandemic.
  • To demonstrate how targeted universalism can achieve universal health goals by addressing the needs of systematically disadvantaged populations.

Main Methods:

  • Conceptual analysis of health system failures during the COVID-19 pandemic.
  • Application of the targeted universalism framework to health equity.

Main Results:

  • Targeted universalism allows for the achievement of universal societal objectives through tailored strategies.
  • This approach prioritizes addressing the specific needs of disadvantaged groups to ensure equitable participation in universal goals.

Conclusions:

  • Implementing targeted universalism is crucial for creating a "better normal" rather than just a "new normal" after the pandemic.
  • Remaking health systems with targeted strategies is essential to improve health equity and honor the lives lost.
  • This approach offers a viable pathway to address deep-seated inequities and strengthen health systems for the future.