Not to mention that, in the country I live in, it is guaranteed that while you're idly rolling forward, some asshole will cut you off and take your place so that he can win that precious 2 seconds.
I'd like to avoid the wear on my car and my nerves, but it's not possible because some (expletive) person will fill the gap.
(or was I being trolled? see "comedy in Boston" in one of the "cousin" comments nearby)
http://trafficwaves.org/trafexp.html
In my experience cars are just as likely to cut in as out, and that's what the extra space is for anyway.If you arrive any later it will be minute or two per hour, so worrying about people "getting ahead" of you accomplishes nothing. If you want to win the race against the others on the freeway tomorrow, leave 5 minutes earlier!