I believe there are highways designed like #1, I seem to remember visiting the NY/NJ area, and I think it was the NJ turnpike that was this way. Several lanes

I believe there are highways designed like #1, I seem to remember visiting the NY/NJ area, and I think it was the NJ turnpike that was this way. Several lanes of "through traffic" with a wall, and every few miles, it merged with a few lanes on the right of "getting off/on soon" lanes.