Planes all start their take off from basically the same position and stress the whole runway, slowly lowering as lift increases, but at their highest weight.

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tadfisher 9 hours ago | parent [-]

And this is because pilots are trained to keep their nose gear on the centerline, and there are relatively few aircraft types in use which receive the "heavy" after their flight number over ATC. So wheels are going to roll over the exact same tracks repeatedly.

	▲	krisoft 7 hours ago \| parent [-]
		> pilots are trained to keep their nose gear on the centerline Funily I was learning to fly at a grass strip and we were told to vary our positioning left and right on the runway for exactly this reason. In practice it meant that as we were taxiing to the runway my instructor would tell me “Today we are taking off left/right of center to avoid damaging the grass too much.”