ELF rides the line between car and bicycle for green future... This machine works with a solar-powered motor that assists with pedaling, runs on three wheels, and comes in at a height that’s the same as a sedan. As this vehicle can “go anywhere a bicycle can”, it’s allowed to traverse more than just the road, allowing for cross-over movement that’d be hindered with a motorcycle. Base cost of $4,000. This machine works with solar power and can travel 1,800 miles.