Railway stations in Yemen include: Maps * UN Map * UNHCR Map Existing No railways exist at present. Proposed Railways connecting with adjacent countries are proposed, and some internal lines. A railway line to Saudi Arabia at an estimated cost of $3.5bn. The project includes a 729km international line that connects the Yemeni-Saudi border to five cities in Yemen. The second axis includes a line to Oman, which extends across the Yemeni-Omani border at a length of 766km. The third axis will consist of a 386km Balhaf-Aden line while the fourth axis will extend from Hazm al-Juf, Marib, Shabwa to Balhaf port on the Arabian Sea at a length of 578km. The government is also planning to add a fifth axis extending from Sana'a to the Hodeida port on the Red Sea. The Bridge of the Horns would provide a link over the Red Sea to Djibouti. Closed A short narrow gauge military railway existed at one time from Aden. Standards Future railways in Yemen are likely to employ standard gauge and other world standards such as 25kV AC.