In one aspect, an apparatus for turning a corner, the apparatus being disposed adjacent to a grounded surface and comprising: a turntable platter, rotatably coupled to the grounded surface, for orienting a line-drawn trolley; a locking mechanism, disposed on the turntable platter, for preventing rotation of the turntable platter with respect to the grounded surface; a first turntable guide, removably coupled to the turntable platter, for guiding a draw line through the line-drawn trolley; a second turntable guide, removably coupled to the turntable platter, for guiding the draw line through the line-drawn trolley; a first stationary diverter, removably coupled to the grounded surface, for diverting the draw line around the line-drawn trolley; and a second stationary diverter, removably coupled to the grounded surface, for diverting the draw line around the line-drawn trolley.

A self-propelled unit for movable operation on a support structure along a first axis of movement and a second axis of movement that is transverse to the first axis of movement includes a carrier configured for movable displacement on the support structure. A first conveyor assembly is operable to move the carrier on the support structure along the first axis of movement. A second conveyor assembly is operable to move the carrier on the support structure along the second axis of movement. A light source can be attached to the carrier in an operable mode to provide illumination to an area in proximity to the carrier. At least one power contact is configured to maintain electrical contact between the carrier and the support structure.

A self-propelled unit for movable operation on a support structure along a first axis of movement and a second axis of movement that is transverse to the first axis of movement includes a carrier configured for movable displacement on the support structure. A first conveyor assembly is operable to move the carrier on the support structure along the first axis of movement. A second conveyor assembly is operable to move the carrier on the support structure along the second axis of movement. A light source can be attached to the carrier in an operable mode to provide illumination to an area in proximity to the carrier. At least one power contact is configured to maintain electrical contact between the carrier and the support structure.

A self-propelled unit for movable operation on a support structure along a first axis of movement and a second axis of movement that is transverse to the first axis of movement includes a carrier configured for movable displacement on the support structure. A first conveyor assembly is operable to move the carrier on the support structure along the first axis of movement. A second conveyor assembly is operable to move the carrier on the support structure along the second axis of movement. A light source can be attached to the carrier in an operable mode to provide illumination to an area in proximity to the carrier. At least one power contact is configured to maintain electrical contact between the carrier and the support structure.

A method and system for a rotational multi-track railway switch-junction. The rotational multi-track railway junction comprises one or more incoming tracks and a plurality of outgoing tracks connected by a rotating platform to a plurality of stationary track sections. The rotational platform provides a connection between at least one of the incoming tracks and at least one of the outgoing tracks and can be automatically controlled and locked in a given position. Thus, costs and an overall size of a railway junction are reduced.

A method and system for a rotational multi-track railway switch-junction. The rotational multi-track railway junction comprises one or more incoming tracks and a plurality of outgoing tracks connected by a rotating platform to a plurality of stationary track sections. The rotational platform provides a connection between at least one of the incoming tracks and at least one of the outgoing tracks and can be automatically controlled and locked in a given position. Thus, costs and an overall size of a railway junction are reduced.