Afghanistan doesn't need more infrastructure, it needs more Toyotas and gas stations. And more camels from Mithrandir's stables but Australian ones, not the endangered Baktrian kind.
A single Toyota is better than 100 km of tarmac for the region.With the right tires, the Toyota can easy tackle any kind of terrain, including the desert we call Afghanistan.
Build that pipeline with Gazprom and plit it in 3 (Russia 1/3, NATO 1/3 and Karzai the rest).Than start a cars-for-guns program that will ensure any Afghan gets to drive a proper Toyota. Invade the country with drive-in-motels and the crisis is over.