Mecca kilometer elevated metro transports pilgrims to holy sites Mount Arafat, Muzdalifah and Mina in the city during hajj reducing the congestion on the roads. Mecca Metro, officially known as Makkah Mass Rail Transit, is a planned four-line metro system for the city. This will be in addition to the Al Mashaaer Al Mugaddassah Metro which carries pilgrims during Hajj. A high speed inter-city rail line (Haramain High Speed Rail Project also known as the "Western Railway"), is under construction in Saudi Arabia. It will link along 444 kilometres (276 mi), the Muslim holy cities of Medina and Mecca via King
Mecca the "Hollow of Mecca". The area contains the valley of Al Taneem, the Valley of Bakkah and the valley of Abqar. This mountainous location has defined the contemporary expansion of the city. The city centers on the Masjid al-Haram area, which is lower than most of the city. The area around the mosque is the old city. The main avenues are "Al-Mudda'ah" and "Sūq al-Layl" to the north of the mosque, and "As-Sūg Assaghīr" to the south. As the Saudis expanded the Grand Mosque in the center of the city, hundreds of houses were replaced by wide avenues and city