Best practice: Data for Sustainable Routing

Location: Salt Lake City, Utah, United States

Challenge:

Salt Lake City faced severe congestion and high transport emissions, especially during peak commuting and visitor periods. While primary roads struggled with overload, secondary routes and scenic byways remained underused.

Solution:

In 2021, Google researchers introduced an eco-friendly routing model leveraging real-time traffic, road grade, and vehicle fuel-efficiency data to suggest routes with lower predicted CO₂ emissions. The system often favored paths that reduced emissions even if travel times were slightly longer, validated by local traffic sensors and actual navigation behavior.

Impact:

The study "Quantifying the Sustainability Impact of Google Maps" revealed citywide average savings of 1.7% in CO₂ emissions and 6.5% in travel time. Google Maps users who were rerouted saw even greater benefits: 3.4% lower emissions and 12.5% shorter travel times. This demonstrates how small, data-driven efficiency gains can scale substantially to improve urban sustainability and mobility.

Adaptation Tip:

Destinations should keep accurate, verified, and up-to-date map data covering all roads, trails, and attractions. Google Maps’ eco-routing in Salt Lake City demonstrates how real-time traffic, road grade, and fuel-efficiency data can optimize routes, reduce emissions, balance traffic, and ease overtourism by directing visitors to less crowded locations. Regular data audits and collaboration with experts like Visible Tourism ensure visitors enjoy safer, greener, and more sustainable experiences while protecting local communities.

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