Crime, disinvestment, and low density

cden4

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I've been reading a very interesting book called Cities in Full, which talks about what makes cities work and what doesn't, focusing on American cities. One thing it talks about is the "gray zone" of a city, typically areas that are not of sufficient density to survive well in the city.

One example it gives is Boston's Roxbury neighborhood. It cites one problem with the neighborhood being that despite it's urban location, it has many single-family detached houses, many which replaced larger higher density buildings of the past. In the somewhat recent past, density was equated with crime, thus HUD and others replaced higher density housing with lower density housing, with the goal of reducing crime. However, what we've now seen is that this is failed logic.

The book cites how a solid streetwall and a certain density of residences actually makes the streets safer, as there are more eyes on the street and less places for criminals to run. With single family houses or even larger buildings not filling enough of their property, criminals can run between and behind buildings, whereas row houses or town houses form an impenetrable streetwall.

Among other things, low density in the city does not have the critical mass of people to support neighborhood business or a sufficient level of transit. It's the wrong type of development for the location it's in. It ends up being an enclave of car-dependency in the wrong location, one that is not appealing to the middle or upper class, and therefore continues to breed many problems.

I'm encouraged somewhat by recent developments in Boston to build new housing and retail of sufficient urban density in the city, replacing lower density uses (Charlesview and Ashmont Station, among others, come to mind), although I fear somewhat that neighborhood activists do not understand that density is a good thing. There is so much focus on "traffic", that people lose sight of the benefits of having more people in the area and the additional safety, business, and transit that those people will support. The reality is that denser developments generate LESS traffic than the suburbs because there are more places to walk to and better transit service.

Anyone care to comment on this?
 
Jane Jacobs talked about this in Life and Death of Great American Cities. In fact she cited Roxbury and talked about these very same problems so I wouldn't be surprised if the author was citing her writing.

I think it is an interesting theory but maybe an overly simplistic one. There are countless towns across Massachusetts that have a density of Roxbury but are safe and quiet. I think that economics, class, and race play a big part in why Roxbury is Roxbury.
 
I believe the author was quoting Jane Jacobs, or at least citing her work. I thought about that too, why it works in some places and not others. I think it has to do with the great migration to the suburbs that happened in the last half century. People who could afford to left, and people who couldn't didn't. The point of the author, I think, is that the solution to revitalizing these urban neighborhoods is not reducing its density but increasing it. I don't think it's troubles started because of density, but the reduction of density over time has made the problems worse.
 
One example it gives is Boston's Roxbury neighborhood. It cites one problem with the neighborhood being that despite it's urban location, it has many single-family detached houses, many which replaced larger higher density buildings of the past.

I'm aware of formerly dense areas of Roxbury (mostly between Dudley Street/Malcolm X and Mass Ave) that are no longer dense b/c they were torn down for the Inner Belt highway. There are also a number of housing projects in that portion of Roxbury that are laid out in a way that is anti-urban, but I doubt many of them are much less dense that what preceded them and few if any are detached single families.

Other than that, the majority of Roxbury consists of detached homes from the late 19th and early 20th century laid out similarly to what you find in Brighton or Jamaica Plain.

Just want to be sure we're advocating for development of vacant Inner Belt lots and better urban design for the housing projects in Lower Roxbury, rather than increased density in the relatively attractive, albeit low-income sections of the neighborhood further south.
 
can someone explain the inner beltway and why it got past planning stages and actually destroyed buildings, and was never actually built? and it was going to connect from where 95 and 128 meet in Norwood or whatever town that is there correct? Was this like a Roosevelt plan type thing revisited in the 60's to jump the economy or just seen as a necessity I'm somewhat lost on this topic.
 
The Inner Belt was supposed to be a loop highway (I-695) through Boston, Brookline, Cambridge, and Somerville, connecting I-93 to I-93 via a route through the Emerald Necklace, over (on top of) the BU bridge, and behind MIT. Thankfully, it was stopped, along with the plan to extend I-95 to meet up with the Inner Belt. (It would have been the Southwest Expressway.)

There was a Radio Boston show all about this, and the site also contains links to more information:

http://www.radioboston.org/index.php/2007/10/25/how-sargent-stopped-the-highways.html
 
Not much was torn down for the Inner Belt, other than some area around today's Northeastern University. A fair amount was torn down for the Southwest Expressway, between Forest Hills and Ruggles.

I don't see either high or low density correlating especially strongly with violent crime. Very dense Somerville has a pretty low rate of violent crime, and so do sparsely settled Lexington and intermediate-density Arlington. Same for the other side of the river -- not much violent crime in either 'suburban' West Roxbury or the ultra-dense North End.
 
I remember Jane Jacobs talking about the North End, but don't remember anything about Roxbury ...
 
She had a few pages about the neighborhood around Elm Hill Avenue, if I recall correctly.
 
In fact, I just finished the chapter where she mentions Roxbury has roughly 1/9th the density of the North End. Chapter 10 or 11 I believe.
 
Does Jamaica Plain have significantly different density from Roxbury? JP is not free of crime, but people generally perceive it as safe to walk around.
 
Does Jamaica Plain have significantly different density from Roxbury? JP is not free of crime, but people generally perceive it as safe to walk around.

I would hazard that JP is *less* dense than Roxbury, and gets even less dense if you include all the abutting Emerald Necklace parks (Franklin Park, the Arnold Arboretum, Jamaica Pond, Forest Hills Cemetery, etc.).

Don't miss this great article in the Atlantic about how some suburban cul-de-sac housing is becoming the new American slum: http://www.theatlantic.com/doc/200803/subprime
 
I meant the residential and commercial area only -- throwing in all the surrounding parkland and cemeteries would skew the numbers badly.
 
I meant the residential and commercial area only -- throwing in all the surrounding parkland and cemeteries would skew the numbers badly.

Where do you draw the neighborhood boundaries?

If you are OK with the BRA's definitions of the neighborhood boundaries, you can look at their 2000 Census analysis...

Gross population per square mile
Roxbury 14,127.7 (land area 3.9 sq mi)
Jamaica Plain 12,402.0 (land area 3.07 sq mi)
Boston 12,172.3 (land area 48.4 sq mi)

But in this analysis the BRA includes Mission Hill as part of JP and puts Egleston Square in Roxbury instead of JP. And the land area includes the parks -- JP gets the Emerald Necklace and the Arboretum while Franklin Park placed in Roxbury.

Any thoughts on a better way to calculate density?
 

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