Not getting single blue line on Navigate on Autopilot.

[CharleyBC]

There are definitely cross roads on the highways we have been testing. I know there are true freeways in Vancouver area and I know that NOA works there as I have seen videos from "model3man" with the single solid blue line.

Yep. There are portions of US 101 in California that are freeway and then it changes to crossroad traffic and back to freeway again. Full NoA (with the single, centered blue line) will turn off with some appropriate message and revert to AutoSteer (double blue lines). Then it'll happily re-engage itself again when the road becomes freeway.