Abstract: A system for propelling a vehicle along an elevated, pneumatic power tube carried by exterior support structure above ground. First and second angles define tracks for the vehicle and extend parallel to the power tube. Undercarriages secured to the vehicle including vehicle support and guidance wheels which are rotatable about axes inclined relative to legs of the angle tracks have a periphery that engages the legs of the angle tracks so that the weight of the vehicle is supported by the tracks and the support structure only. A pneumatic propulsion unit is movably disposed inside the power tube and is guided along rails on the inside of the power tube. A magnetic coupler having first and second cooperating magnetic elements is attached to the vehicle and the propulsion unit in operative alignment with each other. A portion of the power tube located between the magnetic elements is constructed of a non-magnetic and non-conductive material and extends over the length of the power tube.