I had stopped my forester in the left hand turn lane about 3 to 5 feet behind another vehicle while waiting for the signal to change from red to the green arrow. i put my vehicle into park and took my foot off the brake. i turned to check the pocket of my jacket in the rear seat. i turned back in the driving direction, put my foot on the brake and moved the automatic gear shift into the drive position. my car surged forward with the engine racing and hit the vehicle in front of me. i could not control the speed with the brakes, so i shifted back into park. this stopped my car. there is damage to my front grill and hood. this is not the first time i had this happen. the first time this occurred, i called subaru headquarters and explained the issues to a subaru representative. i was told this was a new issue and no recall was being considered. i took my car into the subaru dealer and they checked it and said they could not find any problems. the same thing occurred at least two more times prior to august 10, 2015. i never had any damage to my subaru or any other vehicle because i was not near any other vehicle when this surging occurred and i could get control of my subaru by putting the automatic gear shift into park. i purchased my subaru forester new and currently have 160,845 miles.