the on-ramp stoplights prevent traffic jams on the highway by preventing multiple cars from merging at once and fucking up the rightmost lane, which then causes people to change lanes unsafely leftwards, which then fucks up the whole highway.
so, stopping at the on-ramp stoplight does save you 10 seconds because that's a traffic jam averted (or of reduced intensity).
I looked at the Wikipedia page for [redacted], and it makes no mention of automobile exports. It's probably just an error.