Stamen worked with the engineers and designers at Toyota on a data visualization project for the Toyota Onramp 2015 event in San Francisco. The Onramp event allowed participants to test drive the Toyota i-Road, a sustainable three-wheel compact vehicle that was not yet available in the U.S., and the Mirai, a hydrogen fuel cell electric vehicle.

A highlight of the event was the Smart Mobility Challenge, a contest open to the public that called for innovators to offer ideas for how the Toyota i-Road could address urban planning and local sustainability needs in the Bay Area. Stamen worked closely with Toyota to analyze the data from an i-Road pilot run in Toyota City, and to visualize it so that contestants could better understand how the system could be rolled out in the Bay Area.