Minnesota engineer Dave Edmonson won the Society of Automotive Engineers MPG contest in 1977 and 1978 with a lightweight three-wheel vehicle that he soon put into production and sold as the HMV Free-Way, weighing 750 lbs and producing 12 to 16 hp. An electric model was available.
Only around 700 Free-ways were ever made and many have been modified.
Within less than five years the company went bankrupt. The last models appear to have been given away in repayment of outstanding debts.
Online ephemera include charmingly rough newsletters and the original order form.