Alternative C: Widen Interstate 664, including the MMMBT, from the Powhatan Parkway interchange in Hampton to Interstate 264 in Chesapeake, to eight lanes - four in each direction. Also adds a new bridge-tunnel (the third crossing) over the Elizabeth River to connect the MMMBT just north of Craney Island to I-564 in Norfolk, near the Norfolk Naval Base. Also adds a roadway along the east side of Craney Island to Route 164.