I'd be concerned about direct access not being safe depending how much space folks are given to get up to speed and merge into highway traffic. Also during peek commute hours, those areas intaking and outting commuters into the flow would more than likely generate some wicked traffic situations. Also from a more human aspect living so close to an active highway probably will add to folks stress levels and contribute to a deterioration to overall individual mental health.

Like your hearts in the right place, no doubt, execution may need a little more fine tuning.