http://www.railwaygazette.com/news/single-view/view/haramain-high-speed-rail-deal-ratified.html
Railway networks for Muslim's pilgrimage are gradually prepared after opening of Mecca Metro.
When we consider that approximately 2 million people pay visit to Mecca, mass transit system has to be constructed.
Then, some people may ask me "If transportation for Mecca is prepared, the number of Muslims entering Great Mosque of Mecca won't increase, due to occupation of it is limited."
But, never mind. Rituals in the mosque has been simplified to live up to increase of Pilgrim numbers.
Even though rituals are omitted, it's still dangerous to visit the mosque without knowing the situation there. More than 10 pilgrims died from the crowd every year.
If you go there, please be careful.