Here is some more information on railroads in Burkina Faso. Some of this may already have been presented by Peach, I don't remember.
The 510-km (317-mi) Mossi Railroad in Burkina Faso is part of the line that begins at Abidjan, Côte d'Ivoire, and ends in Niger, some 1,145 km (710 mi) away. The line serves the towns of Banfora, Bobo-Dioulasso, Koudougou, and Ouagadougou; 25–40% of the railway traffic passes through Burkina Faso, where total rail trackage was 622 km (386 mi) in 2002. Planning for the construction of a railroad from Ouagadougou to Tambao (353 km/219 mi) to exploit the mineral deposits in the area was begun in October 1981. Constructed by volunteers, the line reached Donsin, 33 km (21 mi) from Ouagadougou, in 1987, and the second stage to Kaya (77 km/48 mi) was completed by 1991.
Note that the above information is not consistent. If there is only 386 miles of track, the 317 miles which gets from the western border of Burkina Faso to Ouagadougou will only leave 69 miles. That will not come anywehere close to reaching the border with Niger to the east
EDITOR's NOTE - Further research indicates that the lien ends in Kaya north of Ouagadougou and does not get anywhere near Niger. Also, that research has turned up this statement from the website of thte holding company that owns SITARAIL:
Railway operations has been severely disrupted due to the current political unrest in the Ivory Coast. Various attempts have been made to restore the operations but these proved extremely difficult. The border between Ivory Coast and Burkina Faso has also been closed at different intervals depending on stability in the Ivory Coast.
The company is confident that operations could return to normal as soon as peace has returned to the region.
This totally supports the information PEACH received and presented, but does not mean that some rail services cannot operate within Burkina Faso. The question is where would AR12 want to go?