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Air pollution study helped city ban truck traffic

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A collaboration between researchers and residents of a New Jersey city provided evidence that heavy truck traffic affected a neighborhood’s air quality and compromised health.

For decades, heavy diesel trucks taking cargo from container ships at the Port Newark-Elizabeth Marine Terminal used a residential street in Elizabeth, New Jersey, to avoid the tolls between Exits 13 and 13A on the New Jersey Turnpike. The trucks also routinely idled on the street awaiting their next load.

Their route along the narrow, two-lane First Street took them past many homes, two schools, a childcare center, and an athletic field, prompting concern that the community’s rising rates of asthma were connected to the diesel exhaust.

In 2014, residents contacted Robert Laumbach, director of community outreach for Rutgers Center for Environmental Exposures and Disease and the Environmental and Occupational Health Sciences Institute for help.

The data “gave us irrefutable proof that the trucks were making a negative impact on our air quality. They were the catalyst for change.”

Laumbach enlisted residents as “citizen-researchers” to work with his team and count trucks and measure particulate matter air pollutants between 8 a.m. and 10 a.m. on a typical weekday morning when children walked to school. Their goal was to create a profile of the air pollution levels on First Street.

“We tracked 60 trucks an hour at one intersection and 120 trucks per hour at a second intersection,” Laumbach says. “These trucks were passing children walking on the street at a rate of one truck per minute. We also saw a spike in black carbon with each passing truck, which indicates diesel exhaust pollution.”

Diesel exhaust is a major component of particulate matter air pollution, which has been linked to asthma, lung diseases, and heart disease. Researchers have also studied the role of diesel exhaust in causing an increased risk of death from heart attacks and stroke, premature birth, and adverse pregnancy outcomes. Additionally, its toxic gases and vapors are linked to cancer and can affect cognition and learning.

“The effects of diesel exhaust on asthma are particularly troubling in Elizabeth, where there is concern about high rates of asthma, especially among children,” Laumbach says.

After Laumbach and community leaders presented the collected data to local officials, the City of Elizabeth’s council passed an ordinance in 2017 to restrict traffic on First Street to vehicles under four tons, essentially banning tractor-trailers.

Four years after the first truck count, Laumbach and his researchers partnered again with residents for a post-ordinance assessment on truck count and diesel emissions. They found an 86 percent reduction in truck traffic and an 80 percent reduction in black carbon and ultrafine particle counts.

“The emissions and smog polluting the air was environmental injustice, making our residential area where children walk and play dangerous to their health,” says James Carey, director of social services of Elizabethport Presbyterian Center on First Street, who assisted with the research. “When we went to the hearings, their statistics gave us irrefutable proof that the trucks were making a negative impact on our air quality. They were the catalyst for change.”

The researchers presented their findings at the Public Health and Our Ports: The Road to Clean Air conference in Newark.

Source: Rutgers University