Uzbek news agency УзА (UZA) has a report about a recent official visit which discussed Afghan railway projects. Google’s automatic translation and a bit of tidying up gives something like this, although I don’t speak Russian so it might not be quite right!

Visiting Afghan delegation

On 27 August a delegation from Afghanistan headed by Ali Safari Sohrobom, Minister of Public Works, met Akbar Shukurovym, Deputy Chairman of state railway company Uzbekiston Temir Yullari.

During the meeting they stressed the importance of the promotion of mutual cooperation in such spheres as trade, the economy, energy, transport and communications, the legal basis for which agreements [were, will be?] reached during meetings of the heads of state of Uzbekistan and Afghanistan.

Links between Uzbekistan and Afghanistan in the field of transport and communications are important. During the meeting the sides exchanged views on expanding co-operation between the two countries in the field of railway transport.

No more details are given, unfortunately.