There are several cross-Arab State roads, crossing the Arab world from its farthest point in the west in Mauritania, to its eastern farthest point in Oman. The Arab States are connected with roads and highways that cross deserts, mountains and forests. The most developed state with high road infrastructure is the United Arab Emirates, followed by Syria, Saudi Arabia, Algeria, Morocco, Jordan and Egypt, while countries such as Sudan, Libya, Mauritania, Somalia and Yemen seem to have a lot of building to do.