A vast network of highways and railways are to be built under the aegis of CPEC that will span the length and breadth of Pakistan. Inefficiencies stemming from Pakistan's mostly dilapidated transportation network are estimated by the government to cause a loss of 3.55% of the country's annual GDP.[13] Modern transportation networks built under CPEC will link seaports in Gwadar and Karachi with northern Pakistan, as well as points further north in western China and Central Asia.[14] A 1,100-kilometre-long motorway will be built between the cities of Karachi and Lahore as part of CPEC,[15] while the Karakoram Highway from Hasan Abdal to the Chinese border will be completely reconstructed and overhauled.[4] The Karachi–Peshawar main railway line will also be upgraded to allow for train travel at up to 160 km per hour by December 2019.[17][18] Pakistan's railway network will also be extended to eventually connect to China's Southern Xinjiang Railway in Kashgar.[19] The estimated $11 billion required to modernise transportation networks will be financed by subsidized concessionary loans.[20]