I live in the Forest Hills neighborhood of Jamaica Plain in the city  of Boston.  The neighborhood on the whole is a great place to live as it  features diverse people of different backgrounds and social scale, a  wide variety of attractive housing, interesting and successful local  business, access to public transit and bike paths and lots of parks and  green space.  One scar on this great neighborhood is the area  immediately around the Forest Hills T Station.  In the shadow of a large  highway overpass carrying cars on the Arborway there are large parking  areas, derelict empty lots, and depressed-looking commercial and  industrial places.  Plans are afoot to revitalize this area such as  redeveloping the MBTA’s Arborway Yard and building new transit-oriented  housing and commercial space directly around the T station.  While these  plans seem to be on hold due to the current state of the economy, plans to remove the elevated highway known as the Casey Overpass appears to be going forward.
I heartily welcome the removal of this eyesore which is both  overbuilt for the traffic it carries and a detriment to the  neighborhood.  Unfortunately, there is a movement afoot to create an  auto-centric solution by rebuilding the overpass which I believe would  bode poorly for the future of the neighborhood as well as for anyone who  wishes to navigate the area below the bridge on foot, by bike, on  public transportation, and even by car.  Several organizations such as LivableStreet, WalkBoston,  The Emerald Necklace Conservancy,  MassBike, the Boston Cyclists Union, and JP Bikes have come out in favor of an at-grade city street option to replace the  current overpass.  Below is a copy of my letter to Thomas Broderick,  acting chief engineer of MassDOT, explaining my reasons for supporting  the at-grade option.  If you live in Jamaica Plain, Roslindale or  elsewhere in Boston  and would like to help spur the economic  development of Forest Hills by making it livable for all users –  pedestrians, cyclists, and transit users as well as motorists – please  consider writing a letter yourself (the BCU provides a good template) and attending future public meetings to support an at-grade city street.
Dear Mr. Broderick,
I am a resident of the Forest Hills neighborhood in Jamaica Plain  and commute through the intersection below the Casey Overpass on a  daily basis by foot, bicycle, public transportation and by automobile.  I  welcome the news that the crumbling and overbuilt Casey Overpass must  be demolished and could be replaced with an at-grade city street.  This  approach would help reconnect the Emerald Necklace, create new public  space, allow for better neighborhood development and provide safer  connections for bicyclists and pedestrians as well as motorists.   Unfortunately, voices are mobilizing to encourage MassDOT to take a more  expensive and auto-centric approach by reconstructing the highway  overpass over Forest Hills.  I am writing to offer my support for an  at-grade city street connecting the Arborway as the better option for  the future of the neighborhood and its residents.
I am aware that traffic engineers in your department have  determined that both a bridge and the at-grade option will handle the  predicted traffic flow of 2035 in roughly the same way. In light of this  I see no reason to build a bridge. In future projects, I believe that  the recently consolidated MassDOT would serve Massachusetts better to  find ways to hold traffic flow around our fair city to the levels of  2011 or less instead of planning for traffic increases. This could be  accomplished in many areas by developing public transportation, a safe  connective bikeways network and pedestrian-friendly streets that  encourage active transportation and healthier lifestyles.
The current situation under the bridge is quite the harrowing  experience for pedestrians and cyclists and even for motorists.  The  bridge support structure creates blinds spots for turning vehicles and  lack signaled left turn lanes making the intersection a frightening  place to make a turn.  When I commute by bike passing under the Casey  Overpass is the most unpleasant part of my ride although necessary to  navigate this intersection to get from my home to the Southwest Corridor  Bike Path.  An at-grade option would mean that the bike path would no  longer have to dead end at New Washington St.
With the existing at grade New Washington Street and the access  lanes to the highway overpass, pedestrians have to make as many as three  crossings in a short distance when walking down Washington or South  Streets.  The access ramps are particularly dangerous to cross since  drivers using them have a “highway mentality” that causes them to exceed  the speed limit and not pay attention to walkers and bikers.  I find  that the overpass and the access lines also contribute to automotive  congestion in the morning rush hour as the need to have multiple traffic  signals close together causes the traffic flow to back up.  In fact, on  one occasion I was stuck on a 39 bus for five minutes because a handful  of cars snarled up South Street between the two traffic lights under  the overpass.  An at-grade city street would mean that motorists, buses,  bicyclists and pedestrians would only have to navigate one crossing  making the street easier and more welcoming for everyone.
I am also concerned of the costs to taxpayers and neighborhood  residents that come from constructing a new highway overpass through  Forest Hills.  The overpass is obviously the more expensive option and  would leave little money for improved facilities for bicycling, walking  and public transportation that would be possible with the at-grade  option.  Historically, the Casey Overpass was a decision made in the  1950s when high-speed auto transportation through the city was thought  to be the wave the future.  This mentality caused considerable harm to  Boston such as the Fitzgerald Expressway forced through the heart of the  city and paving over James Jackson Storrow’s Embankment parks.  Here in  Boston and in cities worldwide the idea of urban freeways has been  discredited and when elevated highways are removed in cities from San  Francisco to Seoul the cities have benefited from increased economic  development and reduced automobile congestion.  It should also be noted  that the Casey Overpasss was rebuilt in the 1980s just 30 years after it  was constructed.  Now 30 years later it needs to be rebuilt again.  The  cost of the new overpass would include greater maintenance costs and  the very real possibility that in another 30 years we would be in the  same situation of repairing and replacing that bridge. 
Finally, there are great opportunities to improve the Forest  Hills neighborhood from the Arborway Yard to the parking lots and open  space around the T station.  Examples of economic development in the  shadow of a freeway overpass are few and far between and the current  development in the immediate area of the overpass reflects the  depressing effect of highway infrastructure in a neighborhood setting.   Permanently removing the Casey Overpass would be a good first step in  encouraging the development of new transit-oriented housing and  commercial space that would revitalize Forest Hills as a dynamic  bikable, walkable and economically-flourishing neighborhood. With the  construction of the new large Co-Op store and other small businesses to  join them in the near future, the Forest Hills area is fast becoming a  thriving business district, not merely an MBTA transit center located  amidst several neighborhoods. It is imperative that traffic is slowed  down and adequate long-term access solutions are created to accommodate  the increasing numbers of pedestrians and bicyclists.
My approval and support of the at-grade option is contingent on  the timely completion of bike paths that will travel up both sides of  Washington St. toward Roslindale from the project area, and ending at  Ukraine Way where they will be designed to connect to and complement the  bike lanes on that street. The construction of these bike paths should  be considered as part of the replacement project and completed within  the same time frame as that project.
It is also contingent on there being no “slip lanes” at either  Washington Street, Hyde Park Avenue or South Street. Slip lanes create  dangerous situations for both pedestrians and cyclists due their wider  radius turn that allows cars to travel through them at an increased  speed. There is no need for speed in this area and in this community we  value the safety of our residents over convenience for motor vehicles.
I also support converting Shea Circle into “Shea Square” by  creating a normal intersection there. Traffic circles, particularly  those handling more than one lane of traffic, have been proven to be  particularly dangerous to bicyclists and pedestrians.  Further along the  Arborway, MassDOT should consider redesigning the large rotary at the  intersection with Centre Street.  Currently traffic coming from Forest  Hills gets backed up by the traffic signal while traffic from all other  directions is not signaled and enters directly into the circle with very  little congestion.  Improved traffic flow for this intersection would  help prevent auto traffic from backing up into Forest Hills.
I strongly believe that the at-grade option offers a better  future for myself and for the neighborhood I love.  Please consider the  needs and happiness of all people – residents, pedestrians, public  transit users, and cyclists as well as motorists – when planning for the  future of Forest Hills.