Seattle is among the nation's top cities for clean transportation

Seattle is not far behind San Jose, San Francisco and New York in limiting greenhouse gas emissions from local transportation , according to a recent report.

Why it matters: Transportation is the biggest driver of greenhouse gas emissions in the nation and accounts for 60% of greenhouse gas emissions in Seattle, according to the city's 2023 Climate Change Response Framework .

State of play: The Seattle metro area, which includes Tacoma and Bellevue, came in fifth overall.

• The Transportation Climate Impact Index , created by transportation analysis firm StreetLight Data, ranks the 100 most populous U.S. cities across a variety of transportation-related emissions factors.
• They include overall vehicle miles traveled (VMT), vehicle fuel efficiency, electric vehicle adoption , transit ridership, cycling, walking, truck miles traveled and VMT change over time.
• VMT carried the most weight, followed by vehicles' fuel economy and transit ridership.

Zoom in: Not all vehicle miles driven are equal in environmental impact and the Seattle region has an EV adoption rate that's far outpaced the nation's.

• Electric vehicles accounted for 17.2% of monthly new vehicle registrations in the Seattle area in January 2023 — up from 8.4% in January 2022 .
• Seattle was in second place for vehicle miles traveled, fifth for transit ridership and sixth for vehicle fuel economy.
• But the region placed 43rd in the annual number of daily walking trips in 2022, a 38% decline from 2019, per a StreetLight Data pedestrian report .

What to watch: Seattle and Washington state are taking measures to lower greenhouse emissions.

• Washington State Ferries — the largest U.S. ferry system by ridership — is working to shift to a zero-emissions fleet by 2050.
• In Seattle, a new building efficiency standard that is expected to reduce building sector emissions by 27% and citywide emissions by 10% by 2050 was signed into law last year.
• Two major climate-related state policies aimed at cutting state greenhouse gas emissions took effect last January: a clean fuel standard and a new cap-and-trade program.

Yes, but: A voter initiative to roll back the cap-and-trade program is on the November ballot .

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