WMFE is Central Florida's primary provider of NPR programming on 90.7 FM and Classical Music on 90.7 HD2. Part of the community since 1965, WMFE focuses on providing quality national and local news and programming. We inspire and empower all Central Floridians to discover, grow and engage within and beyond their world.
Support for 90.7 WMFE is provided by

Orlando roads could soon use pavement that lowers air pollution and keeps cool, experts say

A strip of Westmoreland Drive in Orlando was used to test a pavement treatment that can lower air pollution and temperatures. The city is considering wider use of the technology in other areas. (Trevor Fraser / Orlando Sentinel)


Orlando is looking to be one the first cities to try a new pavement treatment that can reduce certain types of air pollution by nearly half. What’s more, the treatment has the potential to lower ambient temperatures.

The treatment, developed by Pavement Technologies, uses a photocatalytic titanium oxide solution injected into the pavement to capture nitrous oxide, a greenhouse gas emitted by cars, and also volatile organic compounds, another type of chemical air pollution.

The solution also reflects sunlight, thereby reducing what is known as the heat island effect where pavement raises the ambient temperature around it.

“It’s sort of like walking outside wearing a white T-shirt instead of black one,” said Rick Howard, director of public works for the city of Orlando.

Howard explained the use of titanium oxide solutions are not new, just not widespread in the U.S.

“It’s been used in Europe and Japan,” he said. “It’s not unknown.”

In 2018, Orlando was selected along with Greenville, S.C., to be the site of a test of the new pavement by the Texas A&M Transportation Institute, with treatment going to a section of South Westmoreland Drive near Gore Street.

While temperature differences are difficult to monitor on such a small scale, targeted air pollutants were found to be reduced as much as 31%, according to Howard.

Another test of the material was conducted at Orlando International Airport in conjunction with engineering firm Avcon. Two 500-sq. foot sections were injected with the treatment in the cargo area. Judith-Ann Jarrette, an assistant director of airport operations with OIA, said the nitrous oxide was reduced by nearly half.

And that wasn’t the only effect Jarrett saw. “A lot of pavements build up algae,” she said, but the treated areas didn’t develop any.

Orlando is considering a broader use of the treatment, with a proposal on the table for a 2.2-square-mile area around the interchange of I-4 and the 408 Expressway. “We thought if ever there was going to be sources of pollution … we’d probably get our biggest bang for the buck there,” Howard said.

Bucks are the current obstacle. Howard estimates the treated pavement to cost between $1.50 and $2 per square yard, almost double current paving costs. “We’re really looking for partnerships with some environmental funding agencies,” Howard said.

Air pollution has been rising in recent years in Orlando and Orange County. The American Lung Association in May delivered a report stating that particle pollution got worse between 2017 and 2019, though it still gave the county an A grade for it. (Orange County received a C grade for its ozone pollution.)

A larger-scale test of the material would also demonstrate its temperature-reducing abilities, lowering what is known as the heat island effect around paved areas. Howard said if it works to expectations, “it could lower building costs, electricity costs and cooling costs.”


Get The 90.7 WMFE Newsletter

Your trusted news source for the latest Central Florida news, updates on special programs and more.

GET THE LATEST
Stay tuned in to our local news coverage: Listen to 90.7 WMFE on your FM or HD radio, the WMFE mobile app or your smart speaker — say “Alexa, play NPR” and you’ll be connected.

WMFE Journalistic Ethics Code | Public Media Code of Integrity

TOP