I will have to disagree with this but it's up to you what you think should be done.  I for one would not draw additional ways through "area" highways.

The reasoning is as follows:
1. The ways and the area are redundant.  If you know the area you can route, you know where it's legal to route.
2. If you must add another way through the area, this is a router problem not a data problem.

The only issue here is that this is technically drawing for the renderer.  Else the walking area serves no real purpose as you should be walking along the paths anyway.  Or at least that's why you drew them.

That's my two cents.
