As noted earlier, the project team for the Boundary Channel Drive Interchange Project had a meeting last night to get input on the alternatives. Below are the three concepts showing what the design might look like. A thick orange line - for a sidewalk or path - shows a connection between the Mount Vernon Trail spur, along Boundary Channel Drive to Long Bridge Drive.
I like Concept 1 best, based on the drawings. By removing the north ramp from I-395 to Boundary Channel drive, it eliminates an at-grade crossing of a highway ramp. In all of the concepts there are more connections made, and the road under I-395 is reduced from 4 lanes to 2, creating more space for cyclists and pedestrians.
Concept 2 is probably the worst design for MVT trail users.