GreenRoad has a device that starts each day with a green light. If the driver swerves a lot or has to brake hard, then the light turns yellow. If the driving gets worse, then the light turns red. The device uses a GPS chip, accelerometer, a CPU, and has Google Maps built in. GreenRoad has raised a total of of $40 million from Virgin Green Fund, Balderton Capital, Benchmark Capital, and DAG Ventures. Today the company has raised $10 million from Generation Investment, owned by Al Gore and David Blood (former CEO of Goldman Sachs asset management). [TechCrunch]