Thursday, February 6, 2014

Colonias

Stumbled on this post about what are called colonias (colonies) down by the border.
A colonia is actually produced the same way most neighborhoods usually are: Take a plot of land and subdivide, subdivide, and subdivide again. Property owners can build as they wish.
This usually starts out as a collection of trailers or other types of temporary dwellings.
Over time, intensification happens. Soon enough, it is impossible to tell colonias apart from their township and hutment brethren.

But it doesn't stop there. Over time a colonia starts to look like a gecekondu, campamento, or favela--that is, it has become essentially identical in built form to a "formal" neighborhood. This is emergent urbanism, the purest manifestation of our community-building impulse.
That isn't to say they don't have problems, of course. Infrastructure provision is weak to nonexistent. The water is filthy, and illnesses spread like wildfire. More than a few commentators call colonias "third-world slums".
But that's the problem, isn't it? Slum is too general a word, and we confuse ourselves when we use it. There are two classes of slum problems--infrastructural problems and socioeconomic problems. We often assume all "slums" have both, and that all neighborhoods inhabited by the less well-off are "slums", and in so doing, not infrequently, offer exactly the wrong solutions for the problems at hand.

The real problem of mature informal settlements--like mature favelas, campamentos, gecekondular, or, yes, colonias--are not socioeconomic. Attaining maturity by definition means intensification, which implies adequate internal solutions to socioeconomic issues to maintain a positive economic trajectory. No, the real problems of such communities are infrastructural.
And to solve infrastructural issues--requires formalization. It requires that the community be recognized as a community and not derided as a slum. It requires, in short, that we stop assuming that every place that isn't as well-off as Suburban America is "poor", a "slum", and needs to be "cleared"--a bias inherent in certain advocacy organizations--
--and instead work to identify what causes socioeconomic problems, understand a community's socioeconomic trajectory, install physical and social infrastructure as needed, and allow the community to continue incremental progress.
See, here's the bulldozer problem, the bulldozer bias, the bulldozer fallacy: When you flatten a slum, you don't make the slum go away. You make it go somewhere else. But what you do make go away--are the solutions embedded within the slum. The bulldozers just make the problem worse.
Some* people, fortunately, understand. But they are the minority.
__________
*That said, "solid homes with garages and paved driveways"? Really?? That's your idea of incremental improvement? Can you be more biased???

Wednesday, February 5, 2014

No Girder Rail Is Made In America Whatsoever

Yep, this is a problem for light-rail and especially streetcar projects.

(Girder rail is the best kind of rail for street running.)

In fact, there's only one producer of it in the world--in Austria.

But look on the bright side: Build enough streetcar track and you can catalyze domestic girder rail orders.

But Buy America is a major block between A and B.

Oh look--protectionism run amok undermining the development of domestic industry. Again.

Tuesday, February 4, 2014

Quinnipiac Bypass

An extension of the Along the Shore program developed earlier.
This thingy
In that post, I worried about bypassing strong curvature just east of New Haven, and I put in a tangent line at the best alignment I thought I could find.
Original tangent line
My worrying is all for naught, though, because I had confused the locations of Union Station and State Street station. Having fixed that, I followed Alon's recommendation that
[t]his project ... start right at New Haven Union Station, cross the Quinnipiac River at a new bridge near US 1 and the new I-95 bridge, follow I-95 to the state line, and then cut across barely-populated territory to the Shore Line at Kingston, where it straightens.
as far as Lake Saltonsall, because I think the existing line has adequate curvature from there to Old Saybrook, and certainly an adequate curvature envelope to further improve speeds.
Quinnipiac Bypass of sharp curvature northeast of New Haven
The replacement Quinnipiac Bypass is shown above.

Monday, February 3, 2014

Rail Rhode Island

Where we last left off, we discussed the infrastructural challenges associated with bring regional rail to southeastern Rhode Island. This was precipitated by a consideration of Providence alignments.
New Haven map of Boston and Providence rail networks
Now I'd like to come full circle, and pare the New Haven alignments maps down to a good state network for Rhode Island.
New Haven alignments from Providence
Why a state network?

Rhode Island is perhaps unique in a couple of core attributes. First, it is dominated by a single city, Providence. This in itself is not unique. But second, it is such a size that the state is very nearly ringed by natural destinations--and a system serving these destinations would have approximately the same dimensions as a typical commuter rail system. That is, what makes Rhode Island unique, from a transportation planning standpoint, is that its state needs are fulfilled by what is essentially a large commuter system.
Natural destinations from Providence--cities and places surrounding, but not far, from Rhode Island. At right, Cape Cod.
The actual commuter elements are concentrated in a far smaller part of the network: to Bristol, to Fall River, to Woonsocket, to Kingston, to Mansfield, to West Warwick. The greater system is built on a series of "Lancaster Model" regional links.

The Lancaster Model

Consider the city of Lancaster, PA. It is a small city of only about 60k--a third of Providence's. It is linked, however, to Harrisburg, Philadelphia, and New York with regular (almost hourly) trains. And this regularity drives ridership both to the east and west. So, despite Lancaster and Harrisburg's small sizes--the latter is 50k--regular service drives outsize ridership.

Actually, what makes Lancaster a useful model is that, globally, it is typical. A midsize city with good rail service realizes good ridership, much better than what most American examples have been capable of. The small cities along the Empire Corridor--Rochester, Syracuse, Schenectady, Utica, Albany--likewise realize outsize ridership. So do the smaller cities on the San Joaquin in California. And so do New Haven and New London. So an optimal regional model strings services between these cities.

This, in turn, allows us to see natural termini at
  • Worcester
  • Framingham
  • Putnam
  • Norwich
  • New London
  • Newport
  • New Bedford
  • Boston
  • Cape Cod
in addition to the tighter belt of commuter services.
Rail Rhode Island
And from New Haven lines from Providence to these natural termini flows this nine-line network. From northwest counterclockwise:
  1. Blackstone Line. Service to Worcester via Woonsocket and the Blackstone Valley.
  2. New York-New England Line. Splits from Blackstone Line at Blackstone; heads to Putnam via its eponymous right-of-way.
  3. Thames River Line. Follows the old New York-New England Providence branch to Plainfield, and the Thames Valley subdivision (New London-Worcester) from there down to Norwich. It would be reduced back to Plainfield in the presence of Connecticut regional rail.
  4. Mystic Line. Follows the Northeast Corridor to Waverly; there meets Shore Line East trains. (Extension of the latter is already on the drawing boards.)
  5. Narragansett Bay Line. Dubbed "Bristol-Newport Line" last post, renamed after the bay it runs alongside.
  6. Mount Hope Bay Line. Formerly dubbed "Fall River-New Bedford Line", likewise renamed after a bay it passes.
  7. Cape Cod Line. Extends from Providence to Middleborough via Attleboro and Taunton. Formerly route of the Cape Codder. You may note it doesn't actually reach the Cape; more on this later.
  8. Providence Line. Existing MBTA alignment along Northeast Corridor.
  9. Patriot Line. Service to Framingham via Foxborough. Named for the fact it passes Gillette Stadium.
Services on these lines would run hourly, while services from the commuter termini run fifteen minutes.

What's the Deal with Cape Cod, Anyway?

Cape Cod is a resort area, and a bit different than the type of service Rail Rhode Island is geared to offer. In fact, service to the Cape mainly needs to target weekenders, with vacationers and Cape denizens both being secondary categories. For this reason, peak service needs to be Friday-Sunday, rather than the workweek core of the commuter networks feeding into the Cape. And because a weekending population is less transfer-sensitive, it makes sense to run (or franchise) service from Middleborough on separately. (That said, a good connection is still self-evidently necessary.)
Cape Cod route/franchise
An Operations Agency

While Rail Rhode Island by itself is essentially built to offer service indistinguishable from other commuter/regional rail services in the United States and abroad, it does also have the potential to connect into a broader regional network. Most of New England can, in fact, be united by such a network. So a further avenue of exploration of development of a larger New England rail network, which large chunks of proposed Rail Rhode Island would be subsumed into.

A Providence Pickle

Providence has a bit of a pickle. Its track alignment only allows for through-running from all other lines onto either the Mystic or Thames Valley lines. This is untenable. Among other considerations, the Blackstone Valley and Mount Hope Bay Lines have, between them, the highest ridership potential; a through-routing for them must be found. Expect further discussion on this matter soon.

Friday, January 31, 2014

Railroad Suburbia 2.0

A lot of the New Urbanist corpus--particularly the town planning elements--focuses on the traditional town planning model. Their ultimate desire is to build communities like these:
Now the thing is the communities the New Urbanists have built
have tended to look a lot like
each of which happens to be a railroad suburb.

Railroad suburbs were primarily developed during the Victorian era, fin-de-siècle, and into the 1920s. Aping developers' success in using streetcar lines to sell new housing, several railroads decided to enter the development game themselves and build "New Towns" lineside. This pattern--small, semi-dispersed centers of population highly centralized around train stations (a major railroad suburb giveaway is when a train station lies at one end of Main Street) became a primary mode of outward urban expansion for the better part of a century, and has left us a rich heritage of the nicest, leafiest communities in cities all across the nation. And, despite catastrophic disinvestment in anything that wasn't a house farm from the 1950s to the early 2000s, railroad suburbs continued to be the effective archetype of quality American community.
(And sometimes they became something more.)

New Urbanism got its start replicating railroad suburbs as new towns--even if the original railroad discontinued passenger service, the railroad suburb is, for all intents and purposes, a new town. Duany and Plater-Zyberk folded in some Southern Baroque town planning tradition, and--voilà!--an alternative to house farms, Levittown tracts, and meandering anti-grids was born.

There are profound implications to this. First, one of the great successes of the movement is the re-creation of the railroad suburb. Transit-Oriented Development, an idea about as old as New Urbanism, is (in essence) a manner of development built on the workings of a railroad suburb.
In the eventuality transportation policy changes--as it must, if Italy is at the vanguard of the trend--we have reclaimed the development model associated with a smaller, smarter, more compact type of urbanism and town-building.

The key becomes, then, developing the right transportation policy: Most cities have enormous wealths of historical (largely disused) potential commuter rail lines--lines on which, were they active, we can hang New Urbanist (re)developments and intensification...These should be the avenues of growth in metros.


Thursday, January 30, 2014

Not a Guaranteed Income, But Income Guaranteed to Cover Certain Costs

A comment I made on an Atlantic Cities article:
A minimum wage indexed to (a) local CoL and (b) inflation would (should) yield a minimum wage with equivalent local buying power, which I would argue constitutes the key "equal protection" here.

That is to say: a standard minimum wage of $10/hr buys a lot more in Alabama than California. But an indexed minimum wage should be designed such that the same amount of work-hours would be needed to buy, for example, a month of rent in Alabama as in California (and furthermore, that the amount of work-hours needed to buy a month of rent in either would be the same at any given time). That would be the equal protection a minimum wage provides.

One way of implementing this idea would be for the federal government to not set any minimum wage, but rather set a standard buying power for a minimum wage. States would have a legal obligation (mandate) so set a minimum wage equivalent to this buying power; other entities (like cities, counties, and municipalities) can augment this as they see fit, based on local buying power.
 A few comments:
  1. This standard buying power would be an assertion of certain economic rights extended to all Americans. (At a certain level, this is actually a stronger assertion than a basic income, as the latter only states you have the right to make x, whereas the former states you have the right to make enough to cover the cost of x. This harks to the x-f(x) distinction in Taleb's work; it is easier to find f(x) in a system defined {x|f(x)} than x itself--that is, in very complex systems, it is often easier to to isolate a function of a variable than the variable itself. Combine this with a couple of other provisions and you have the framework for a guaranteed minimum income.) 
  2. Such economic rights could be informally stated as:
    1. The right to shelter
    2. The right to transportation
    3. The right to healthcare
    4. The right to adequate nutrition
    5. The right to adequate clothing
    6. The right to save
  3. A better formalization for (2) would be that the minimum wage standard would be such that a person making the minimum wage would be guaranteed to make enough to cover:
    1. one month's studio apartment rent + basic utilities*;
    2. one monthly bus pass**;
    3. one month of health insurance;
    4. 60,000-90,000 Calories/month***;
    5. 1/36 the cost of a standard 10-day wardrobe, monthly^;
    6. Σ(i=1, n=5)a(i), that is, the summation of the other costs^^.
  4. The state's responsibility, then, would be to index these requirements to prevailing local costs. Once those costs are ascertained, the minimum hourly wage becomes 1/160 this cost^^^. Cost-indexing it also has the nice side effect of inflation-indexing it; the state's cost index would be required to be updated annually; a state found to be using a cost index more than three years out of date would be subject to the withholding of federal funds (and class-action suits).
  5. These economic guarantees also allow for a shrinkage in the welfare-state bureaucracy, as the 90k Cal/mth guaranteed obviates the need for food stamps for any employed person, and the health insurance purchase guarantee likewise obviates the need for Medicaid for any employed person. These two programs, in particular, form one of the most insidious forms of corporate welfare: corporations paying workers below the CoL, thereby forcing them into public programs to make up for the shortfall, such that the financial benefits from such programs accrues from the government to corporations. (The housing guarantee likewise obviates the need for public housing.)
  6. These guarantees are extended on the condition of employment (as is implied by their structure as a minimum wage cost index). To have truly universal economic freedoms, however, one needs to find some way of extending certain of these guarantees to the unemployed. This, then becomes the next challenge.
__________
*Gas, water, electric, (mobile, not home) phone, Internet. Yes, this implies a right to Internet access. I think it's essential for doing much of anything nowadays, don't you?
**Why? Well, (a) regardless of what zoning enforces, at this level of income, car ownership is a very expensive luxury, and we don't want to encode low cost/benefit ratio things (like car ownership giving access to jobs), and (b) our nation's bike system and bike culture are not yet developed to the point where universal bike access would be a fair formal statement of the right to transportation.
***60k Cal = 2k Cal/day * 30 days; 90k Cal = 3k Cal/day * 30 days; that is, the daily caloric intake generally needed to maintain weight for women and (slightly greater than) men, respectively.
^TBH, I have no idea how to calculate this cost, although what I have in mind is the cost of completely replacing a "professional" wardrobe, at outlet prices, every three years--hence 1/3 the cost/year, 1/12 that cost/month, 1/3*1/12=1/36.
^^Based on the budgeting principle that half of one's income should go to the aforementioned outlays; that is, the minimum wage should be tailored to the lowest feasible rate which one can keep a balanced budget.
^^^The costs being computed monthly: four weeks in a month, so 1/4 the cost weekly; 40 hours in a full-time workweek, so 1/40 the weekly cost hourly; 1/4*1/40=1/160, i.e. one works 90 hrs/mth to make ends meet, and 160 hrs/mth to make a living wage.

Wednesday, January 29, 2014

Tail Fattening in Practice

Some fun stuff:

A recent Strong Towns post tells us that (1) sales taxes are increasingly being used as DOT slush funds (due to excessive restrictions on local tax collection),
while (2) this table suggests there is a mighty overhang in retail in this country (made worse by the fact that such counts routinely undercount antifragile retail),

thereby (3) heading into the teeth of a likely large-scale retail downsizing,

which would (4) extirpate sales tax revenues in most locations--shrinking the size footprint of the transportation slush fund.

This is consistent with "tail fattening" (think Nassim Taleb)--especially the kind that, to reduce or mitigate risk now, kicks it down the road, compounding it when the interest's due.
The only real long-term solution is--as  I have said before and I will say again--conversion to a user fees-based system for access-managed roads, and massive reductions in maintained infrastructure for all general-access byways.

Tuesday, January 28, 2014

Polar Vortices and Other Fun Things

Well fuck.
This image is the global temperature-deviation-from-mean chart as of December 2013. It is published by NASA's Goddard Institute. On it, you can clearly see two things: the polar vortex, and where the polar vortex is supposed to be.

It turns out that the circumpolar whirl over the Arctic is elliptical and hence has two nodes. One normally lies over Baffin Island; the other, northeastern Siberia (Yakutia? Chukotka?). This is contrasted with Antarctica's polar vortex, which is stabler with only one node over the Ross Ice Shelf; the best guess for why that is, is because the Southern Hemisphere has a landmass at the pole, and the Northern, an ocean.

The thing about an ellipse, though, is that it is less stable than a circle. Right now the Antarctic whirl looks to be between Ross and Graham Land. But look at that deep burgundy in Siberia!

Hypothesis time: Warm air is pushing the Siberian node of the Arctic whirl into the ocean; this in turn is displacing the Baffin Island node into eastern continental North America.

Hypothesis #2: The greater variability of the Arctic whirl (relative to the Antarctic's) has something to do with the ice age cycle of the past five million years. It is notable, for example, that the southernmost extent of the recent polar vortex broadly parallels, in latitude, the southernmost extent of glaciation historically associated with ice ages.

...And #3: Perhaps the proximate cause of the ice age cycle is the destabilization of the Arctic whirl? But if that is the case, what catalyzes it?

Monday, January 27, 2014

Regional Rail from Providence, East

Providence Union Station--back in the day
Alon Levy has kindly pointed out to me that none of the bypasses of the Providence curve really make sense for the stated purpose in the last post; time savings are minimal relative to expense for all of them. (That said, I maintain that the New Haven freight bypass alignment would be an all-around superior route had Union Station trackwork not been removed and erased in the 1970s. It is true, however, that there were excellent urban planning reasons to do something with the existing alignment--it's just that rail access was not considered a a high planning priority.)
New Haven in eastern MA and RI
Even so, the East Side Tunnel continues to have regional use. It is by far the best access alignment from Providence to cities to the southeast--Newport, Bristol, Fall River, and New Bedford. Indeed, it was historically used to provide commuter service from Providence to those latter two cities.
Slade's Ferry Bridge--a lost asset
While the closure and demolition of the Slade's Ferry Bridge severed the link between Providence and Fall River and thence Newport, it does not appear that the New Haven ever actually linked the route from Fall River to New Bedford with its line from Myricks to Newport. Figure 1 shows commuter rail to southeastern Rhode Island using only former New Haven lines.
Fig. 1. Historical NH alignments from Providence SE.
A Circular Argument

Follow the alignments, however, and you'll notice a pattern. Two major alignments historically linked Providence and Newport; they diverged at Fall River. One route linked to the Bristol branch at Warren; the other route ran up to Taunton and around via Attleboro back to Providence. Both are highly inferior alignments today. The implication is that any workable commuter rail from Providence southeast, which hits the four natural termini, must of necessity deal with the region's challenging topography--specifically its strewn-about fjordlike bays.
Mount Hope Bay
Of particular interest is the Mount Hope Bay, whose head is the Taunton River estuary up by Fall River, and mouth flows into the Narragansett Bay just south of Bristol, at the conveniently-named Bristol Point. New Haven easements are available all around Mount Hope Bay, but none provide a good crossing of Mount Hope Bay.
Fig. 2. Hypothetical single crossing of Mt. Hope Bay, superimposed on existing or available rail easements in the area. Reasons against further pursuit--long high bridge requiring access lines to New Bedford (right), Newport (bottom), and Fall River, as well as an excessive greenfield alignment cf. a two-crossing approach--are self-evident. Nearly every other potential single crossing of the bay yields the same, inferior, results.
The bay also demands two crossings. While a single crossing through its middle would theoretically be superior, such a crossing would (a) happen at its widest extent, requiring more than double the superstructure required by crossings at its head and mouth, (b) demand construction of lengthy new alignments to the crossing, and (c) induce excessive branching, needing no less than four different lines to reach each terminus. By contrast, the two-crossing approach allows for two lines--Bristol and Newport would be served by the same line, and Fall River and New Bedford the other.

Across the Taunton

Let us first turn our attention to the Fall River-New Bedford line (FRNB for short). This route is the unification of three discrete routes:
  1. The Somerset Branch, a trace alignment the New Haven abandoned at least prior to 1948. This alignment is salvageable from the junction with the Bristol Branch east to the Lee River crossing, just beyond which the Brayton Point power plant has obliterated the ROW*. This route used to extend across Slade's Ferry Bridge into Fall River.
  2. A Taunton River crossing.
  3. The Watuppa Branch, a good-quality easement from the former mills at the head of the Quequechan to New Bedford.
As good easements are available both east and west of the crossing, most of the time needs to be focused on the crossing itself. As it stands, there are two possible crossing routes:
  • The I-195 alignment across the Braga Bridge and under Falls River
  • The Slade's Ferry alignment with a new alignment built up the Quequechan's remnants to the Watuppa Branch.
These are shown in Figure 3, below. Note that the I-195 alignment, in green, is a good mile less than the Slade's Ferry alignment--thereby optimizing the former.
Fig. 3. Links across the Taunton. In red: the Slade's Ferry alignment that "more-or-less" shadows what's left of the NH alignment; in green, a more direct alignment up the I-195 corridor. Notice how green is dramatically shorter.
Over Bristol Point

The other connection needing to be made is the on the Bristol-Newport line (BN for short, heh). This line has been assembled together for the following three reasons:
  1. Remember what we said about a single-bridge alignment and excessive branching?
  2. A Taunton crossing following the I-195 alignment will by necessity make a cutoff down to the old NH alignment extremely difficult, and furthermore, impinge on potential station sites. No, it is better here to have the station to Boston riverside, and the one to Providence downtown.
  3. As previously stated, a Providence-Fall River-Newport alignment is relatively circuitous. If we want to optimize for straightness (and stay of out Massachusetts), we want a Providence-Bristol-Newport alignment.
Such a line demands a crossing of the Mount Hope Bay by Bristol Point.

On the Aquidneck Island (Newport) side of the bay, this is easy. The NH alignment closely parallels the shore, and the geography allows for a gentle turn onto a bay crossing. Any ramp up can be built alongside the existing alignment.

Far harder is the Bristol Peninsula. The former NH alignment there ran water level as well, but ended in downtown Bristol. Extending from it would require carving out a new waterfront easement, as well as raising track level to the clearance required across Mount Hope Bay.

Far better is a power alignment heading straight down the center of the peninsula. This alignment only extends as far south as Gooding Avenue, however. Extending it further requires cutting through a smallish park and following metes-and-bounds boundaries to minimize takings; it is possible to continue the alignment without significant disruption until between State and Franklin Streets.

At State, entering into a section of town becomes unavoidable; even with an alignment designed to run behind street lots, properties will have to be taken at the cross streets. At Mount Hope Avenue, the optimal easement course curves across Dewolf Avenue through a couple of largish empty lots to run behind Antony Avenue. This, among other things, brings it across the buildup border at Woodlawn Avenue in the woods south of Wolf Cemetery. The proposed route then curves along Metacom Avenue and Ferry Road, alongside Roger Williams University, as it prepares to cross Mount Hope Bay.

Finally, a note: Accessing the power line easement from the Somerset branch in Warren will almost certainly require construction over a fairly large cemetery.

The new Bristol train station would be sited at Franklin Street, where some light industry would be redeveloped into TOD. Indeed, this whole route parallels an extended section of light industry on the east side of Bristol. This may be of use in developing lineside customers.
Mount Hope Bridge
Crossing the bay itself could be done with either (a) a new crossing, or (b) a retrofit of the Mount Hope bridge. For (b) to happen, minor takings of curvature in Bristol Ferry would have to occur, but far more significant would be essentially rebuilding the entire span to significantly heavier loads (not freight-heavy, though) and to have two decks. The current bridge's approach viaducts are rather...spindly...as it is.

Actually, due to the relative age of the current bridge (while the structure is pretty, several obvious deficiencies make it a poster child for functional obsolescence), a multimodal reconstruction may well be called for. Figure 4 below shows how a new alignment through Bristol would work with the existing ones.
Fig. 4. Mount Hope Bay crossing and a new alignment through Bristol, up to Warren.
Into Providence

Two potential alignments could be made into central Providence from the East Side Railroad Tunnel. The first is Option D, as I described the other day as
...link[ing] Providence Station with the old East Side line. Unlike Option C, it does so far closer to the city, linking a short bore tunnel under the Moshassuck and part of College Hill with the existing East Side Railroad Tunnel and running across the Crook Point Bridge.
and the second is Alon Levy's countersuggestion that
for Providence-centric regional rail, it would be interesting to demolish either One Citizens Plaza or the buildings at the northeast corner of Steeple and Canal and go elevated over either Memorial or Kennedy Plaza).
One Citizens Plaza
(I would note that we may not necessarily need to demolish One Citizens Plaza so much as reorient it to Moshassuck Place; the small plaza between the building and the street appears to be sufficient to hold a two-track elevated facility. It's pretty much built over the old NH alignment as it is.)

While either way works, I am of the opinion that the short (~4400 feet or 1.4 km) cutoff tunnel to the existing station works better in a larger picture. S-Bahn networks, in particular, like to cluster at the core. That said, since Alon's alignment is a reflection of the NH one, and the railroad also had an alignment up the Seekonk--one still in use today--a network built around a new station over Memorial Drive at Union Station is very much practicable as well. Figure 5 shows how the bored (red) and elevated (black) alignments interact with the existing one (blue).
Fig. 5. Tunneled (red) and elevated (black) approaches to DT Providence from the East Side Tunnel (blue).
The Whole Picture 

Having found the existing easements out of Providence southeast, and analyzed the infrastructural challenges required in turning them into a line (or two), we now have the beginnings of a high-quality statewide network centered in Providence. These southeastern routes are infrastructurally the most challenging; we'll look at other routes later. For now, our final result is Figure 6.
Fig. 6. Regional rail from Providence southeast
___________________
*Note that, with Brayton Point's planned 2017 shutdown, opportunity may be had to re-establish the ROW. This would greatly ease curvature from the Somerset Branch onto the I-195 alignment.