An upstream or downstream station of a cable transportation system configured for U-turning the direction of movement of transportation units supported and moved outside the station by at least a cable, the station comprising: - a device for the automatic uncoupling of the cable from the transportation units; - a device for the automatic coupling of the cable to the transportation units; - a guiding device extending along a longitudinal axis; wherein the longitudinal axis is an axis passing through a point of medium distance between the automatic uncoupling device and the automatic coupling device and the point of maximum depth of the guiding device in the station and wherein the guiding device is configured for supporting and guiding the transportation units inside the station between the automatic uncoupling device and the automatic coupling device; wherein the distance (d) between the longitudinal axis and the uncoupling and coupling device (5, 6) is such as to simultaneously allow the access and exit of transportation units with respect to the station; wherein the guiding device identifies a plan path comprising at least a laterally enlarged portion, which is more distant from the longitudinal axis than the distance (d) between the longitudinal axis and the device for the automatic uncoupling and/or the device for the automatic coupling; wherein the plan path of the guiding device comprises the following sequence of portions: - an inlet portion delimited upstream by the automatic uncoupling device and in which the transportation units are decelerated; - an unloading/loading portion (12, 13) following the inlet portion and in which the transportation units proceed at a substantially constant low speed; the unloading/loading portion (12, 13) comprising a platform for the transit and waiting of passengers and at least a curved portion; - an outlet portion following the unloading/loading portion (12, 13) in which the transportation units are accelerated, the outlet portion being delimited downstream by the automatic coupling device; wherein the enlarged portion extends to at least a part of the curved unloading/loading portion (12, 13); wherein the enlarged portion extends from the unloading/loading portion (12, 13) to at least a part of the inlet portion and/or the outlet portion; characterised in that the enlarged portion extends to the entire length of the inlet portion and/or the outlet portion; wherein the inlet portion and/or the outlet portion is rectilinear. - a device for the automatic uncoupling of the cable from the transportation units; - a device for the automatic coupling of the cable to the transportation units; - a guiding device extending along a longitudinal axis; wherein the longitudinal axis is an axis passing through a point of medium distance between the automatic uncoupling device and the automatic coupling device and the point of maximum depth of the guiding device in the station and wherein the guiding device is configured for supporting and guiding the transportation units inside the station between the automatic uncoupling device and the automatic coupling device; wherein the distance (d) between the longitudinal axis and the uncoupling and coupling device (5, 6) is such as to simultaneously allow the access and exit of transportation units with respect to the station; - an inlet portion delimited upstream by the automatic uncoupling device and in which the transportation units are decelerated; - an unloading/loading portion (12, 13) following the inlet portion and in which the transportation units proceed at a substantially constant low speed; the unloading/loading portion (12, 13) comprising a platform for the transit and waiting of passengers and at least a curved portion; - an outlet portion following the unloading/loading portion (12, 13) in which the transportation units are accelerated, the outlet portion being delimited downstream by the automatic coupling device;