CTRL says that Haste will stay on until a successor is found in the summer.
Norman Haste has stepped down as chief executive of Crossrail.
Cross London Rail Links said that Haste will step down in the summer when a successor has been found.
Haste said he was leaving for personal reasons. He said: “Now that the project has started its Parliamentry approval process, the time is right to pass the baton onto a successor who will be able to carry the project on through the approval stages and into construction.
Haste previously worked as chief executive of the £2.5bn Heathrow Terminal 5 project. His departure comes six months after the arrival of Adrian Montague as Crossrail chairman.
