
Originally posted by
Cismontane
The single biggest problem I have with TOD planning (besides the obvious questions of whether they're affordable and whether enough people actually want to live in them) is where people might need to travel to. Do they really work and recreate in other TOD nodes or at the urban center? Where are their friends and relatives living? If you live and shop in a TOD, will you still need a car to get to work everyday because the tech park you work in isn't itself on another TOD, and your friends and relatives don't live in a TOD? Does that really result in a reduction to car ownership? The empirical data I've seen from studies in California is decidedly mixed and almost always less than convincing. TODs do exhibit lower levels of car ownership, but mostly because of reduced parking availability (which is kind of like shoe-horning it, if you ask me.. if that's all I cared about, I would just outlaw 3 car garages and lmiit on-street parking in any other suburban typology)... this just means, as you put it, more people are sharing or carpooling, and not voluntarily. Also, their friends don't visit because there isn't enough guest parking (I have one friend who lives in a TOD.. none of us will go to see her there since there is never sufficient parking.. except for me, since I don't have a car). Transit mode shares are higher but only marginally so (say 7-8% of daily trips as opposed to 3%). All-in-all, not very persuasive, New Urbanist rhetoric aside.
My own views are far more modest. For the 'burbs, I want incremental densification but still below TOD levels (moving from single family detached at the 8s and 10s now prevailing in California to 10s to 14s.. in other words, still single family with small yards, but with attached instead of detached configurations and smaller units (the latter being driven by chainges in the post-GSE financing environment, and not by design consdierations per se), and I want shorter trips to and from work by reducing the worst effects of large-grain Euclidean zoning. In short, a slightly denser version of Rancho Bernardo, CA, Mission Viejo, CA, Reston VA and Columbia MD instead of a New Urbanist TOD structure and form. I'm pretty comfortable that I can achieve the same empirically observed gains in transit modal share with these more modest interventions as I could with TODs. TODs are only worth considering (given the extra cost, forced inconvenience and unnecessarily smaller unit sizes) if you can show empirically that far greater gains in transit use are possible. So far, that evidence is rather sorely lacking.
In fact, the only interesting evidence I've seen that truly differentiates suburban TODs from other forms of suburban development was property value appreciation prior to the bust.. and that's hardly a good thing. TODs tended to appreciate more quickly in price per square feet and that they actually support higher levels of homebuyer leverage, probably because they qualified for more subsidies and incentives or because people with better credit tend to move that (although I don't know for a fact what the reasons are). This might have persuaded more developers to build them, but it hardly sells me on the concept as a planner, since I want to increase affordability, not shaft it. As it is, I get less for the money and I get more of a bubble effect. Nowadays, I suspect a lot of these TODs just kind of sit empty... or with very high rates of vacancy.
I'm not saying that TODs are never appropriate. Sometimes they are. I'm just saying that they don't even come close to being a panacea and there are far cheaper ways of getting to smilar outcomes, by the numbers.