Influence of road roughness and slope on the accumulation and distribution of tire-wear particles and heavy metals in road dust
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.Rougher roads and slower, stop-and-go traffic significantly increase tire-wear particles (TWP) and heavy metal pollution. Road maintenance and traffic management are crucial for reducing these non-exhaust emissions.
Area Of Science
- Environmental Science
- Urban Planning
- Transportation Engineering
Background
- Non-exhaust traffic emissions, especially from tire and brake wear, are major sources of urban road dust and heavy metal pollution.
- Tire-wear particles (TWP) are increasingly recognized as a source of microplastic pollution.
- The impact of road conditions like roughness, driving speed, and slope on TWP generation and heavy metal deposition is not well understood.
Purpose Of The Study
- To investigate the influence of road roughness (IRI), driving speed, and road slope on TWP generation and heavy metal deposition.
- To provide empirical data linking road characteristics and traffic behavior to non-exhaust emissions.
- To inform urban planning and policy for emission control.
Main Methods
- Field measurements across 57 road segments in Seoul.
- Assessment of International Roughness Index (IRI).
- Road dust sampling and elemental analysis.
Main Results
- Roads with IRI >3.0 m/km showed 11.9% higher TWP concentrations.
- Per-vehicle TWP emissions strongly correlated with IRI, independent of traffic volume.
- Low-speed (<25 km/h) roads accumulated 24% more TWP than high-speed (>40 km/h) roads.
- Downhill segments had higher magnetic content (0.2-2.1%) due to increased braking.
Conclusions
- Road surface deterioration and specific driving conditions (low speed, downhill) significantly amplify tire and brake wear emissions.
- Road maintenance and traffic management strategies are essential for mitigating TWP and heavy metal pollution.
- Findings support the need for policies addressing non-exhaust emissions, such as Euro 7 regulations.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
Related Concept Videos
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences frictional forces that cause slipping. This phenomenon can occur in various situations, such as when a tire rolls on a wet road or a ball rolls on a rough surface.
An object's rolling motion is characterized by its rotation around its axis, while linear motion refers to the object's translational motion along a surface. Frictional forces can...
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...