SLEX, New Highway Tops at 100km/h

SLEX from Alabang to Calamba was just newly renovated a few months ago.  But today, they're now enforcing a strict 60 - 100 km/h speed.  100 km/h seems just a little slow for a new highway.  Why not 110 km/h for a change?  At least now there's a minimum speed limit of 60.  Although that should have been 80.  And it's still so much better than Congressional's 60km/h.  Drivers there have a hard time maintaining that 60km/h magic number.  It's a really wide highway for God's sake!