Wal-Marts on freeways: bad idea
I've been participating in comment threads on austinist and metroblogging Austin on this issue in general and probably ought to write a full crackplog on the whole thing - but for now, just the traffic point:
The latest reason opponents of the Northcross Wal-Mart are attaching desperately to is the fact that Wal-Mart's proposed new location is not directly on a freeway, unlike the two other projects of larger size in our area. From a transportation perspective, this is exactly the wrong reason to oppose Wal-Mart; it's far better for the city for major destinations like Wal-Mart to be on city arterials rather than on frontage roads. In cities in states which don't have this obsession with highways as economic development tools for politically connected landowners, frontage roads typically aren't part of the project, because frontage roads end up generating their own traffic - so every big box retail site is located on arterial roadways, not freeways. Somehow, Brewster, these towns continue to thrive.
In short: it's impossible to deliver good transit service on frontage roads. I'll talk more about WHY this is in a future crackplog; but for now, just take it as a given. The service along US 183 in Northwest Austin is very very bad -- were it not for the useful nearby 2-way Jollyville Road, it'd be even worse. Long, long, long walks for transit patrons to businesses on the other side of the freeway. The workers at this proposed new Wal-Mart on the other hand can walk there quickly from the Northcross transfer center which attracts a dozen or more bus routes from all over the city, no matter from which direction they arrived.
There are lots of defensible reasons to oppose Wal-Mart; just like there were defensible reasons to push the McMansion Ordinance. Like then, latching on to something you think will be effective but you know is dishonest is a bad move in the long-run.