Considering Yemen's size, its
road transportation system is extremely limited. Yemen has 71,300 kilometers of roads, only 6,200 kilometers of which are
paved. In the north, roads connecting
Sanaa,
Taizz, and
Al Hudaydah are in good condition, as is the
intercity bus system. In the south, on the other hand, roads are in need of repair, except for the Aden–Taizz road. In November 2005, the
World Bank approved a US$40 million project to upgrade 200 kilometers of intermediate rural roads and 75 kilometers of village-access roads as part of a larger effort to strengthen Yemen's rural-road planning and engineering capabilities. Plans are underway to build an estimated US$1.6 billion
highway linking Aden (in the south) and
Amran (in the north). The road will include more than 10 tunnels and halve the travel time between the southern
coast and the northern
border with
Saudi Arabia. The British government has a clear warning for their military and civilian employees, or British tourists, about using the roads in Yemen: “In the event of a breakdown of law and order access routes in and out of major cities may be blocked. If you wish to drive outside Sanaa you will need prior permission from the Yemen Tourist Police. Travel permits may take at least 24 hours to be issued and are easiest to obtain through a travel agent. Travel without such permission is likely to result in detention and possible deportation. You should be aware that the consular assistance we can offer outside Sanaa is limited due to restrictions on travel. There have been disturbances in Aden, Lahij and al-Dhali’, which have resulted in closures of the Aden-Sanaa road. These have been short-lived but if you intend to travel by road you should check that the road is open before starting your journey. You can drive in Yemen on an International Driving Permit. Driving standards are poor and mountain roads hazardous. You should avoid all road travel outside the main cities at night. Care should also be taken to avoid minefields left over from Yemen's civil wars. Travelling off well-used tracks without an experienced guide could be extremely hazardous, particularly in parts of the south and the central highlands." ==Railways==