The search engine has revealed plans to highlight journeys generating the lowest carbon footprint based on a number of factors, with a focus on traffic data and road inclines.
The feature - which is part of the company's commitment in the fight against climate change - will launch in the US later this year "with a global expansion on the way".
Under the new system, the default Google Maps route will be the eco-friendly option.
However, if an alternative route is significantly faster, the tech giant will give the driver choices to let them compare emission estimates.
Russell Dicker - director of product at Google - said: "What we are seeing is for around half of routes, we are able to find an option more eco-friendly with minimal or no time-cost trade-off."
Meanwhile, in a blog post, the company added: "From Amsterdam to Jakarta, cities around the world have established low emission zones - areas that restrict polluting vehicles like certain diesel cars or cars with specific emissions stickers to help keep the air clean.
"To support these efforts, we're working on alerts to help drivers better understand when they'll be navigating through one of these zones."