Although it is almost impossible to imagine the possibility of congestion charging work in Bogotá, the reality is that not only are a solution to reduce congestion in the city, but a resource for the road network (which both need it).
I do not know what type of scheme can be applied to the implementation of collection points on open track (imagine the line of vehicles to enter downtown on the street 26 or the Beltway), because you can not neglect the time would take to collect the money, deliver the returns and other delays at peak times, be quite complicated for users who have to pay in addition to long lines and this decline is not "apparently" congestion.
I wonder, will not be necessary to provide true city trunk roads that allow pass across the city from south to north or east to west, although providing for additional charges that will allow users to transport alternatives without the use of urban roads.
I firmly believe that congestion charging if they are a solution, although only partially, because if it is true that users of the road network must pay the social cost of congestion we cause, this should be extended to service providers of public transportation, since they also generate high levels of congestion and deteriorating road network, and that un sistema ineficiente (halando de servicio colectivo e individual de transporte público) como el actual se tiene el doblede vehículos que en teoría le bastarían a la ciudad para atender el trasnporte público de pasajeros.
Si queremos mas y mejores vías para que nuestros vehículos transiten debemos aportar mas recursos, o sino mejor nos vamos en TransMilenio, en donde solo incurrimos en el costo del pasaje y disfrutamos de un viaje seguro, rápido y eficiente, con lo cual realmente estamos aportando mucho al ambiente y la movilidad de nuestra ciuad.