Impact of Road Closures on Air Quality During the 2004 Democratic National Convention
Author Information
Author(s): Jonathan I. Levy, Lisa K. Baxter, Jane E. Clougherty
Primary Institution: Harvard School of Public Health
Hypothesis
How do road closures during the DNC affect air quality in Boston?
Conclusion
The DNC-related road closures had a small but measurable impact on air quality patterns in Boston.
Supporting Evidence
- Traffic volume on I-93 decreased significantly during the DNC.
- Nitrogen dioxide concentrations showed significant heterogeneity across sampling sites.
- Median nitrogen dioxide concentration ratios indicated lower levels near closed roads.
Takeaway
When roads were closed for the DNC, the air quality changed a little, showing that traffic patterns can affect pollution levels.
Methodology
Passive nitrogen dioxide badges were placed at 40 sites, and continuous measurements of elemental carbon were taken at three sites.
Potential Biases
Potential biases due to the inability to confirm traffic patterns on auxiliary roads.
Limitations
The study's findings could be influenced by general meteorological trends and the limited number of days captured in the analysis.
Statistical Information
P-Value
0.10
Statistical Significance
p=0.10
Digital Object Identifier (DOI)
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