MISTER ("Metropolitan Individual System of Transportation on an Elevated Rail") is a personal rapid transit (PRT) system developed in Poland. It belongs to the group of PRT systems using a carriage suspended by a rail, mounted so its bottom is approximately six metres above the ground. In October 2014 MISTER changed its name to "Metrino PRT".

Olgierd Mikosza, the inventor of the system, claims that switching rails at intersections will be done at full speed of about 50 km/h, with a minimum spacing of 10 m. In addition, adding new intersections and stops should require quite little modification to the current network. The pod's carriage wheels descend to grab the side of a triangular structural truss. To switch to another direction, the wheels on the additional side of the carriage descend to grab a track on the additional side, and lift the first side away.

Considerable thought has gone into reducing the system's cost. The system reuses existing rights of way. The main tracks are about 10 metres (30 ft.) in the air, so that there's no interference with ground traffic, and the truss can go down the centre of a street. The triangular octahedral truss that forms the track is strong, small, lightweight, sheds snow and is above floods. The tracks provide power, so that the vehicles have no heavy, expensive batteries. The design speed of 60 km/h (35 mph) is slow enough that aerodynamic loads are small. New design of the POD is quite aerodynamic but at these speed it is a matter of appearance, not economics to reduce drag.

The pods ascend and descend at 45-degree angles, using a cogway on the truss. A hinge point at the top of the pod permits a level floor at all times. A small ramp at a station permits access by a wheelchair, bicycle or pallet jack. Access to wheelchairs meets statutory requirements for disabled access. Access to pallet jacks permits revenues from pallets of light cargo, which in a few cities can be quite profitable. Only a two by seven metre (7x20 ft.) area on the ground is needed for a minimal station. High traffic stations are possible by parking several pods at an angle to the street. These larger stations need only a five by fifteen metre area (16x50 ft.) to park five pods.

In the Uppsala video, the inventor claims that there's a further plan to disconnect the pod from the overhead rails, and operate it as a dual mode electric vehicle (like Google self driving cars), permitting door-to-door operation. Please note that this was years before Google cars started to be developed.

Currently, six cities in Poland, four in Brazil and three in India (including Delhi) have given METRINO/MISTER tentative permissions to build. These cities didn't buy the system, but rather gave permission to instal it and collect revenues. The inventor is therefore seeking investors.

According to the Uppsala video, the system competed for the PRT installation to be done in Masdar City, but lost the competition. The system has computer simulations of operations, and a prototype of the pod and rail, but the inventor thinks it probably lost because of lack of having a "proven" system. It should be mentioned that the same fate was met by the incumbent system at that stage - ULTra, which wasn't "proven" yet.