September 30, 2019 7:51 AM Subscribe
While flying out of LaGuardia yesterday I was listening to the tower on LiveATC. I noticed that many of the planes on the runway I could see (31) began their takeoff rolls a couple seconds before they received takeoff clearance. This wasn't a typical 'rolling takeoff' in which the plane goes directly from the taxiway into their takeoff roll. The planes were told to line up and wait and came to a full stop at the end of the runway, and began rolling a couple seconds before the tower cleared them to take off. I have never seen this before and cursory googling doesn't turn anything up. Is this permissible, or is it pilots bending the rules at a busy airport?