Ana sa ran za a yi ginin titunan da tsawonsu baki daya ya kai kilomita 290.5 a sassan tsakiya da arewaci da gabashi da kuma yammacin kasar.
Kamfanonin hudu da za su yi aikin sun hada da kamfanin gine-gine na CCECC da Zhejiang Bayong Highway Engineering da kamfanin Hebei Construction Group Corporation da kuma Beijing Urban Construction Group. (Fa'iza Mustapha)