Canton, Mass.–based coffee chain Dunkin' Donuts has built a mobile tiny house that is entirely powered by biofuel—made of 80 percent oil extracted from used Dunkin' coffee grounds and 20 percent alcohol (to make the fuel burn). Constructed in a partnership with Nashville, Tenn.–based tiny house design/build firm New Frontier Tiny Homes and Seattle-based Blue Marble Biomaterials in three months, the tiny house provides an example of how waste can be converted to fuel. The tiny house is currently sitting on a lot in Nahat, Mass., and is available to rent via Airbnb until Oct. 30. [Dunkin' Donuts]

During its annual Year in Infrastructure Conference, held Oct. 15–18 in London, Exton, Pa.–based AEC software company Bentley Systems announced the acquisition of London-based pedestrian simulation and modeling software, Legion. Suitable for use in large-scale urban planning, architecture, and transportation projects, Legion can simulate pedestrian's activities (including circulation and evacuation behavior), and interactions with physical obstacles within public spaces such as metro and railway stations, airports, and stadiums. Using Legion simulation tools with Bentley's OpenBuildings Designer (formerly AECOsim Building Designer), architects and engineers can develop design alternatives that includes pedestrian activities and journeys to and from public spaces, according to a press release.

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