Well, the time has finally come...You will now be able to head west from here on SH 99. Section G of the Grand Parkway is finished, and will open on 3/29/16. There will be no toll charge for the first week. This information was provided and confirmed by our new friend Jennifer Reyna (KPRC2 Traffic Reporter).
https://www.facebook.com/JenniferReynaKPRC/?fref=tshttp://www.grandparkway99.com/about-grand-parkway-99/ 4951