Originally Posted by O-cha
Sorry but that's not how it works, Cars 20 feet apart don't travel an extra 20 feet to become side by side.
Do a simple right angle triangle calculation, over 1/3rd mile you're talking about a tenth of a foot to move over 20 feet.
Also calculating the time delta using linear acceleration will never be remotely accurate.
Actually, it's 0.11478 feet... my bad, typo in my math--that's what I get for applyling the Pythagorean Theorem before my morning coffee!