ArticleAir quality, atmosphere, & health2019
The effects of roadside vegetation characteristics on local, near-road air quality.
Article in Air quality, atmosphere, & health, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
11 citing papers in PubMed, 102 citations in OpenAlex.
- Evaluating the Role of Roadside Green Belts in Mitigating Particulate Matter-Bound Polycyclic Aromatic Hydrocarbon Pollution.Environmental health insights · 2026Article
- Exposure of Volunteer Traffic Assistants to PM2.5 From Transportation in Indonesia: An Environmental Health Risk Analysis.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2025Article
- Air pollution abatement from Green-Blue-Grey infrastructure.The innovation geoscience · 2024Article
- A Review of Urban Planning Approaches to Reduce Air Pollution Exposures.Current environmental health reports · 2024Review
- Resolving the effect of roadside vegetation barriers as a near-road air pollution mitigation strategy.Environmental science. Advances · 2024Article
- The impact of vegetative and solid roadway barriers on particulate matter concentration in urban settings.PloS one · 2024Article
- The associations between social, built and geophysical environment and age-specific dementia mortality among older adults in a high-density Asian city.International journal of health geographics · 2020Observational
- Enhancing the local air quality benefits of roadside green infrastructure using low-cost, impermeable, solid structures (LISS).The Science of the total environment · 2020Article
- Identifying air pollution source impacts in urban communities using mobile monitoring.The Science of the total environment · 2020Article
- Considerations for evaluating green infrastructure impacts in microscale and macroscale air pollution dispersion models.The Science of the total environment · 2019Review
- Combining Dispersion Modeling and Monitoring Data for Community-Scale Air Quality Characterization.Atmosphere · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 4 institutions in 1 country.
Funding
Abstract
Roadside vegetation has been shown to impact downwind, near-road air quality, with some studies identifying reductions in air pollution concentrations and others indicating increases in pollutant levels when vegetation is present. These widely contradictory results have resulted in confusion regarding the capability of vegetative barriers to mitigate near-road air pollution, which numerous studies have associated with significant adverse human health effects. Roadside vegetation studies have investigated the impact of many different types and conditions of vegetation barriers and urban forests, including preserved, existing vegetation stands usually consisting of mixtures of trees and shrubs or plantings of individual trees. A study was conducted along a highway with differing vegetation characteristics to identify if and how the changing characteristics affected downwind air quality. The results indicated that roadside vegetation needed to be of sufficient height, thickness, and coverage to achieve downwind air pollutant reductions. A vegetation stand which was highly porous and contained large gaps within the stand structure had increased downwind pollutant concentrations. These field study results were consistent with other studies that the roadside vegetation could lead to reductions in average, downwind pollutant concentrations by as much as 50% when this vegetation was thick with no gaps or openings. However, the presence of highly porous vegetation with gaps resulted in similar or sometimes higher concentrations than measured in a clearing with no vegetation. The combination of air quality and meteorological measurements indicated that the vegetation affects downwind pollutant concentrations through attenuation of meteorological and vehicle-induced turbulence as air passes through the vegetation, enhanced mixing as portions of the traffic pollution plume are blocked and forced over the vegetation, and through particulate deposition onto leaf and branch surfaces. Computational fluid dynamic modeling highlighted that density of the vegetation barrier affects pollutant levels, with a leaf area density of 3.0 m
Identifiers
32636958PMC7339705W2904157408What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.