Since coming to Philadelphia without regulatory approval in October 2014, Uber has pulled the safety net out from under taxi drivers and claimed their place in the city. In the Philadelphia metro area, Uber says, it now has more than 12,000 active drivers - who have taken a ride in the last 28 days - and more than half a million active riders who have used the app in the last three months. In July, Uber pledged $2.5 million to expand its service in the suburbs and subsidize surge pricing, those times when prices jump for passengers in high-demand areas. This came after SEPTA announced that a third of its Regional Rail cars would be off the tracks for the summer due to fatigue cracks in a beam and the need for emergency repairs.