An article in Dawn dated May 14, 2006 quotes M H A Beg visiting Central Asia to follow Babar‘s passage from the Amu Darya to Nilab:

Babar must have crossed the river Amu somewhere near Termiz. This is the famous crossing site of men and armies. The most famous in recent history being the Russian army of 1979 through the Bridge of Friendship, named in contrast to the act of invasion.

The bridge still stands. It is used by the trade traffic. Not only does it have a road but also a railway crossing from Uzbekistan to Afghanistan. To establish a station for unloading goods, they built a town named Hayratan, a dismal place with a railway yard and some houses belonging to the railway workers and army personnel. The town is so recent that it doesn’t even show on some of the older maps of Afghanistan. These days you cannot go on the bridge directly, but a guard will direct you to a place from where the bridge and Amu Darya are within sight.

The bridge is a steel construction, painted pale yellow on the top. Amu is a big river in the region, made famous in Arabic historical writings as the “Nehar”. Arab historians have given the area beyond a name so beautiful and descriptive, “Mavara-un-nehar”. The railway does not go beyond Hayratan. This is the only part of Afghanistan where there is a railway built by the invading Russians. It is their legacy.

Babar writes in his book that after crossing the Amu on a raft, he landed in Afghan Turkistan where he was greeted by vast flat grasslands.

Fuel Line Vol. 3, 2006 from Defense Energy Support has an article “Voruz Earns Bronze Star Thanks to Many Logistics Professionals”. This describes removing a vast quantity of fuel from a US base in Uzbekistan to one in Afghanistan in a hurry during 2005, by rail and lorry. There is a small photo of railway tracks at Hayratan.