One of the replies to the above: "Will you be able to access exits 133 or 136?"
Kinda missing the point about "Express" there buddy. Adding too many exits dilutes its ability to be Express.
That said, did I hear there is one crossover in the works?
Yes, there are flyover ramps that will open later this year a short distance to the south of the exit signed as "Marine Corps Base Quantico" (Exit 148). You can see signs of construction on the
Google Maps satellite view—the northbound exit will be roughly alongside where it says "Coffee Bar 1010" and the southbound entrance will be roughly alongside where it says "Bennys Used Tires." You can get a better view of both of them under construction by clicking into Street View. As I noted above, I've wondered whether this may lead to new northbound tolling segments whereby the portion south of that spot is the first segment and then the portion from that spot north to the slip ramp back to the mainline near the Prince William Parkway becomes the second segment. (Wouldn't work southbound as there is no exit back to the mainline.)
As for access to Exit 133, yes, there will be access southbound (see the map above where it refers to access to Route 17, which is accessed via Exit 133—there's to be a flyover exit allowing for that movement); at a later date this fall or winter, traffic entering from Exit 133 will have a flyover entrance to the northbound express lanes, but it won't be available when the lanes open later this month.