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Building a Zero-Emission Fleet: Parametrix Partners with King County Metro

11-21-2019

Eastgate P&R Rapid Charger Station

By Steve Olling, PE, PMP, ENV SP 

The concept of a zero-emission bus fleet isn’t as far off as you might think. In fact, transit agency King County Metro has been using zero-emission trolley coaches in Seattle for nearly 80 years. The agency has also been recognized as a national leader in early adoption of diesel-electric hybrid buses.

King County Metro is well on their way to meeting their goal to have a zero-emission fleet by 2040. The agency has begun using battery electric coaches, along with continuing to use and modernize their electric trolley fleet. This meets around 11% of their goal already. Starting in 2020, Metro plans to only purchase zero-emission buses as older buses retire and to increase fleet size to meet growing service needs.

The agency will transition to a fleet of all-electric trolley and battery-electric buses ... (more)