PHOTO TANAT VALLEY LIGHT RAILWAY - MONOLOCO THIS IS BELIEVED TO BE THE ONLY GENUINE STEAM MONORAIL LOCOMOTIVE TO SURVIVE ALBEIT MODERN AND OUT OF USE FOR QUITE A FEW YEARS. IT DRIVES BY TWO WHEELS ON THE TOP OF THE RAIL AND IS KEPT UPRIGHT BY GUIDE WHEELS BEARING ON THE SIDES OF THE LOWER SECTION OF THE RAIL (TWO SEEN BOTTOM CENTRE).
