DESIGN ELEMENTS
SHEA CIRCLE
EGGABOUT
ROUNDABOUT
FO
S
RE
T
HI
L LS
ST
E
RE
KEY
ET
T
T
ES
S
ILL
On-Street Bicycle Lane
E
TR
S
Sidewalk
H
Off-Street Bicycle Path
OR
F
S
ILL
ST H
E
FOR
Multi-Use Path
E
E
DRIV
ST
ORE
F
C E M E T E RY ROA D
FRANKLIN
PARK
Crosswalk
RIV
D
S
L
L
HI
Transitional Area
FRANKLIN
PARK
REET
MORTON ST
MORTON STREET
KEY
On-Street Bicycle Lane
YALE TER
Sidewalk
Off-Street Bicycle Path
Multi-Use Path
Crosswalk
Transitional Area
PROS
CONS
Shea Circle is improved with additional signage and
pavement markings
Forest Hills Street no longer has direct access to Shea
Circle
Maintains the landscaped island of Shea Circle
Minimal improvements to pedestrian and bicycle
accommodations
Reduces number of roadways in Shea Circle
PROS
Improved bicycle and pedestrian accommodations with
traffic signal at most movements
Maintains the majority of the landscaped island of Shea
Circle
Provides an opportunity to activate Shea Circle
Traffic operations improve slightly over existing
conditions
CONS
Forest Hills Street no longer has direct access to Shea
Circle
Increased number of traffic signals on the Arborway
Potential queuing issues for eastern signal in the
roundabout due to heavy volumes entering Forest Hills
Drive
Reduces number of roadways to/from Shea Circle
Potentially decreases the amount of impervious surface
draft
Franklin Park
5-FOOT
BIKE LANE
12-FOOT
MULTI-USE
PATH
TRAVEL LANE
12-FOOT
MULTI-USE
PATH
TRAVEL LANE
FULL SIGNAL
TRAVEL LANE
TRAVEL LANE
5-FOOT
BIKE LANE
12-FOOT
MULTI-USE
PATH
KEY
On-Street Bicycle Lane
Sidewalk
Off-Street Bicycle Path
S
Multi-Use Path
Crosswalk
Transitional Area
EST
R
O
F
IVE
DR
S
L
L
I
H
PROS
FRANKLIN
PARK
CONS
Improves bicycle and pedestrian accommodations with
traffic signal
Forest Hills Street no longer has direct access to Shea
Circle
Reduces in the number of roadways converging at
intersection
Usable open space is reallocated to the outside edges of
the corridor
Traffic operations are acceptable at overall LOS D during
both peak hours except for one approach which is
expected to operate at LOS F
Shea Circle landscaped island and the mature trees
within are eliminated
Increases number of signals on the Arborway
MORTON STREET
Franklin Park
8-FOOT
SIDEWALK
8-FOOT
SIDEWALK
FRONTAGE ROAD
10-FOOT
OFF-ROAD BICYCLE PATH
5-FOOT
BIKE LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
LEFT-TURN LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
Cross Section at Shea Square
MORTON STREET
RING ROAD
PROS
Provides on-street parking in front of the Courthouse
Provides a continuous one-way ring road around the
Courthouse complex and Morton Street residences
Provides direct access to Morton Street and Yale Terrace
from Shea intersection
DIRECT CONNECTIONS
CONS
Eliminates direct connection from Hyde Park Avenue
PROS
Vehicles from Morton Street and Orchard Hill Drive can
access bow tie median U-turn lane
Provides parking in front of the Courthouse
Provides direct access to Morton Street and Yale Terrace
from Shea intersection
CASEY OVERPASS PROJECT
CONS
Increases curb cuts along the Arborway with low speed
traffic entering high speed roadway
Eliminates direct connection from Hyde Park Avenue
DESIGN PROCESS &
METHODOLOGY
W
Design Focus Areas
DESIGN CONCEPTS
Dedicated
Bus Ways
A
Access
Denied
Sidewalk
on Bridge
f
Existing
Signal
Parking
Removed
2.Single
=
Bridge
4.Narrow =
Median
ABP timeline and budget
Proposed
Signal
Balancing Mobility and Livability
WAG Priority Design Sub Areas
Fatal Flaw Test
[
Bridge
Design Focus Areas
A
+
Access
Created
A
Access
Modified
Open
Space
P
Parking
V
¬
39
¬
M
¬
,
Design Concepts
¬
G
¬
¬S
Bus 39
Median
Width
,
Relocated 39-Bus Deck
Taxis
Split Bridge
Single Bridge
Varied Height and Length
Definition of Design Elements
T Vent
Stack
P
O
N
M
L
E
! Open Space
! ! Connections
¬B
H
¬
T Grate
Dedicated
Bus Ways
T Headhouse
hg Turns
Prohibited
Sidewalk
on Bridge
A
Existing
Signal
View
Corridor
Access
Denied
O
N
M
L
D
¬
¬T
¦S
G
¬
Proposed
Signal
Drop Off
Areas
Taxi
Shea
Circle
Gathering
Space
Parking
Removed
Definition of Design Elements
1. Split Bridge
3. Wide Median
2. Single Bridge 4. Narrow Median
,
Draft Alternatives
Next Steps
Draft Alternatives
,
Next Steps
,
E. Bridge
+
Continuous Flow
Bow Tie
Traditional Intersection
Traditional intersection
Egg-a-Bout
Modified Rotary
One way loop
Multiple access points
=
D. Shea Circle
[
[
[
[
New
Washington
Morton
Street
Asticou/
Washington/
MBTA Station
B. Asticou/Washington/MBTA Station
C. Morton Street
+
+
e
A. New Washington Street
!+
!!
In each of the design focus areas a number of concepts
were explored:
f
Design Focus Areas
+
+ !!
!
Design Concepts
Shea
Circle
Avoid adverse impacts on future transit
operationsand inter-modal connections
Concepts for the design sub-areas were
selected and tested in the fatal flaw analysis.
The team started with over 25 and through
the fatal flaw process refined to 14 concepts.
+
!
Allow for urban design opportunities
+ +
DESIGN METHODOLOGY
Avoid impact to Arborway Yard
Provide for acceptable local and
regional operations
+
S
+
Note: These alternatives are a sample of the process and
may include other design elements
(e
Restore Emerald Necklace Connections
+
+ +
+
f
Improve safety for all modes and users
+
3.Wide
= + +
Median
,
Concepts must have passed the fatal flaw
test to Accommodate:
A
+ +
,
Fatal Flaw Test
P
+
e
New Washington Street
Shea Circle
South Street, Washington Street, Asticou Road,
and MBTA Forest Hills Station
T Grate
H
Bus 39
39
Shea
Circle
Gathering
Space
¬¬
O¬
N
M
L
S
P
P
3
9
¬ ¬L
O ¬
N
M
h
P
P
T
D
3
9
O¬¬ L
N
M
L
O g¬ ¬
N
M
h
T
P
D
OL
N
M
L
O¬ ¬ ¬ g
N
M
P
+39 +
f
The Working Advisory Group (WAG) identified
three areas of focus for the design process.
Parking
T
Headhouse
Taxi
1. Split
=
Bridge
e
WAG Priority Design Sub Areas
Access
Modified
¬
¬
O
N
M
L
B
¬
View
Corridor
¬
¬
¦
¬
¬
O
N
M
L
D
T
S
G
S
P
Drop Off
Areas
f
[
¬
¬
T Vent
Stack
Turns
Prohibited
E
=
Bridge
Split Bridge
Single Bridge
P
G
! Open Space
! ! Connections
SS
DRAFT ALTERNATIVES
EXAMPLES
!
Asticou/
Washington/
MBTA Station
[
V
¬
hg
[
Relocated 39-Bus Deck
A
[Taxis
Access
Created
Open
Space
e
Morton
Street
A
(e f !
Shea Circle
[
D
¬
«
DESIGN ELEMENTS
T
OG
RE
f
¬
« Asticou/Washington/
DESIGN
FOCUS
AREAS
B
MBTA
Station
¬
«
C
¬
« Morton Street
D
Shea
Circle
¬
«
Bridge
E
¬
«
Continuous Flow
Bow Tie
Traditional Intersection
Traditional intersection
Egg-a-Bout
Modified Rotary
One way loop
Multiple access points
C
¬
«
B
¬
«
A New Washington Street
New
Washington
A
¬
«
A
PR F
f
E
¬
«
WAG
PRIORITY SUB-AREAS
IN
f
f
LEGEND
DR
OR
K
CASEY OVERPASS PROJECT
Develop more refined alternatives
Application of Methods of
Evaluation
Selection of Recommended
Alternative
25% Design
DESIGN
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
A LT E R N AT I V E S
DRAFT ALTERNATIVE 2 -SINGLE BRIDGE WORK IN PROGRESS
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
ALTERNATIVE
1:
SPLIT
BRIDGE
DRAFT ALTERNATIVE 1 - SPLIT BRIDGE WORK IN PROGRESS
3521 WASHINGTON
STREET
T
EE
ARBORWAY YARD
PLANNED
REDEVELOPMENT
GT
ON
ST
R
MBTA
O L
N
M
L
O
N
M
ST
R
O
N
M
L
U
E
W
EL
D
EE
T
¬
S
¦
A D
W
OO
H
IL
L
ST
R
EE
DL
AW
T
Drop Off
Areas
E
Off Street
Bike Path
AV
E
N
U
P
¬
Parking
A
Access
Created
TO
W
Shea
Circle
N
O
N
M
L
Sidewalk
LEGEND - FIXED ELEMENTS
T Vent
Proposed
DESIGN ELEMENTS - Existing
BEST IN CLASS
V Stack G T Grate
Open
Space
f
NU
E
EP
AR
KA
VE
T
¬
(
GAVEN
ER
N
HY
D
NU
E
EP
AR
KA
VE
HY
D
EE
DL
AW
TO
W
H
T
Headhouse
A
E
G
¬
(
ER
ST
R
EE
O
N
M
L
O
N
M
L
¬
S
Signal
Sidewalk
on Bridge
Gathering
Space
T
Signal
Access
Denied
Multi
Modal
A
Path
¬
A
Access
Modified
¬H
¬
Off Street
Bike Path
3DESIGN
9
E
ELEMENTS
- BEST IN CLASS
¬
hg
A
P P
M
A
¬ ¬¬S
A
3
9
D
¬ E
¬
h
P
M
S
G
¬
¦
( g 9/6/2011 ¬
! Open Space
! ! Connections
Turns Open
Restricted
Space
Drop Off
Areas
THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
IS PRELIMINARY
AND CONCEPTUAL, DESPITE THE HARD-LINE
MBTA
PARCEL U
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
Bus 39
View
Corridor
Parking
Parking
Removed
Median
Sidewalk
Width
on Bridge
Shea
Circle
Access
Created
Gathering
Space
T
Headhouse
! Open Space
! ! Connections
Turns
Restricted
Access
Denied
!
400
MBTA
PARCEL V
ST
R
H G
V
¬
A
e
200
39
¬ ¬¬ ¬
¬
D
SHEA
CIRCLE
¦S
f
100
O
N
M
L
IL
L
O
N
M
L
GTON STREE
T
T Grate
(
0
NEW WASHI
N
¬
G
e
f
I
MBTA
PARCEL W
Multi Modal
Path
W
OO
H
¬
V
T Vent
Stack
e
W
EL
D
O
N
M
L
O
N
M
L
EE
Proposed
Signal
(
0
MBTA
PARKING LOT
MBTA
PARCEL U
ST
R
¬
O
N
M
L
A
!
L
O
N
M
O
N
M
L
O
N
M
L
Existing
Signal
e
MBTA
PARCEL V
OR
TO
N
FO
T
S
RE
LS
L
HI
R
ST
T
E
E
!
G
¬
(
T
EE
STREET
AD
RO
O
N
M
L
M
A
f f
U
CO
MBTA
PARCEL W
COURTHOUSE
S
P
T
LEGEND
- FIXED ELEMENTS
¬
¬¬ ¬
O
N
M
L
A
!
HINGTO
N
O¦
N
M
L
SHEA
CIRCLE
P
FITZGERALD LOT
PLANNED
REDEVELOPMENT
H
V G 39
ARNOLD
ARBORETUM
A
TI
AS
O
N
M
L
NEW WA
S
A
A
f f
AD
RO
O
N
M
L
A
T
f
f
U
CO
O
N
M
L
G
¬
(
P
ARBORWAYREE
YARDST
S
L
L
HI
T
S
E
R
FO
!
TI
AS
COURTHOUSE
ARBORW
AY
M
OR
TO
N
ST
RE
ET
FITZGERALD LOT
PLANNED
REDEVELOPMENT
STATE
LAB
¬
ARBORW
AY
¬S ¬D ¬H
3
9
G
¬
¬
V
¬
O
N
M
L
GT
ON
f
P
S S
A
f
MBTA
Access Challenges
!
O
N
M
L
Bridge Abutment (wall)
!
!
¬
(
G
WA
SH
IN
STREET
SOUTH
¬ ¬¬
ARBORWAY
YARD
3615 WASHINGTON
STREET
Touchdown
(where bridge meets surface)
O¬¬
N
M
L
H
D
V G 39
ARBORW
AY
ARNOLD
ARBORETUM
SOUTHWEST
CORRIDOR
PARK
ARBORWAY YARD
PLANNED
REDEVELOPMENT
ST
R
Touchdown
(where bridge meets surface)
Touchdown
(where bridge meets surface)
O¬ ¬
N
M
L
3521 WASHINGTON
STREET
Bridge Abutment (wall)
3615 WASHINGTON
Bridge Abutment (wall)
STREET
ARBORW
AY
STATE
LAB
WA
SH
IN
STREET
SOUTH
SOUTHWEST
CORRIDOR
PARK
f
f
Touchdown
(where bridge meets surface)
E
Bridge Abutment (wall)
Sidewalk
Access
Modified
Bus 39
View
Corridor
Parking
Removed
Median
Width
THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
IS PRELIMINARY AND CONCEPTUAL, DESPITE THE HARD-LINE
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
8-FOOT
SIDEWALK
5-FOOT
BIKE LANE
10-FOOT
OFF-ROAD BICYCLE PATH
CONSTRAINTS
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
9/6/2011
5-FOOT
BIKE LANE
Sample of Some of
Splitthe
Bride Trade-Offs
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
BENEFITS
AT-GRADE
MOBILITY
Does not address taxi relocation, parking issues by Asticou Road
Roadway Operations improved for all modes, future peak regional traffic
volumes accommodated acceptably
No modifications or enhancements to existing transit/bus areas
Under bridge u-turn for access from Morton to New Washington Area removed. Access relocated to redesigned Shea Circle area.
Eliminates courthouse parking under the bridge
Allows for improved pedestrian crossings and connections at grade.
Complicates access to Arborway Yard and other abutting properties
Minimizes the number of street lanes. Allows for improved on- and offstreet bike circulation and connections
LIVABILITY
Interrupts continuity in Emerald Necklace connection
Improved View Corridors between Courthouse and Shea and Arborway
Yards and Housing
Minimizes opportunities for landscaping corridor due to ramps.
Allows for open space treatments along New Washington and between
South Street and Hyde Park Avenue for activities
BRIDGE
MOBILITY
Provides direct pedestrian and bike connection between Arboretum and
Franklin Park
Provides for direct regional connections
LIVABILITY
Sight lines remain obstructed to local resources
Provides opportunity for sunlight between bridges, reducing shadow effect
Wider span for pedestrian and bike access casts shadows and limits open
space below
Bridge and retaining walls disconnect the local neighborhood and activity
centers.
COMPARABLE LOCAL MEDIAN WIDTHS
Blue Hill Avenue (at American Legion Highway)
Blue Hill Avenue (at Glenway Street)
COMPARABLE LOCAL CROSSING WIDTHS
American Legion Highway (near Franklin Hill)
CASEY OVERPASS PROJECT
Melnea Cass Boulevard (at Massachusetts Avenue)
DESIGN
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
A LT E R N AT I V E S
DRAFT ALTERNATIVE 2 -SINGLE BRIDGE WORK IN PROGRESS
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
ALTERNATIVE
2:
SINGLE
BRIDGE
DRAFT ALTERNATIVE 2 -SINGLE BRIDGE WORK IN PROGRESS
3521 WASHINGTON
STREET
T
EE
T
EE
ST
R
GT
ON
P
AD
RO
M
TI
AS
NU
E
EP
AR
KA
VE
¬
¬¬ ¬
H
V G 39
W
OO
NU
E
HY
D
N
AV
E
¬
¦S
O
N
M
L
ST
R
EE
D
T
E
W
EL
D
Drop Off
Areas
H
O
N
M
L
IL
L
ST
R
W
OO
DL
AW
P
¬
Parking
A
Access
Created
¬
(
Shea
Circle
HY
D
MBTA
PARKING LOT
N
U
ER
¬
Proposed
Signal
V
GTOW
N
AV
E
Gathering
Space
ER
¬
A
Sidewalk
on Bridge
S
! Open Space
! ! Connections
ST
R
EE
hg
T
N
EE DESIGN SHOWN
U
MBTA
THE DESIGNER
GENERAL'S WARNING:THE
HERE
E
T
PARCEL U
IS PRELIMINARY AND CONCEPTUAL, DESPITE THE HARD-LINE
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
Turns Open
Space
Restricted
¬
¦S
D
Access
Multi
Modal
Denied
Path
A
T Vent
Stack
Access
Modified
O
N
M
L
¬
G
T Grate
Sidewalk
View
DESIGN
ELEMENTS
Bus
39
39
E Corridor - BEST IN CLASS
¬
P
S
P¬
M
¬
¬
Drop Off
Areas
Sidewalk
Median
on Bridge
Width
Parking
Parking
Removed
A
Shea
Circle
¬
(
G
! Open Space
! ! Connections
Access
Created
Gathering
Space
hg
¬H
T
Headhouse
Off Street
Bike Path
e
EP
AR
KA
VE
T
G
O L
N
M
L
O
N
M
Existing
Signal
DESIGN ELEMENTS - BEST IN CLASS
Open
Space
O
N
M
L
Turns
Restricted
Access
Denied
A
39
¬
P
Bus 39
Parking
Removed
A
!
EE
¬
(
DL
AW
TO
W
O
N
M
L
H A
f
400
ST
R
STREET
¬
T
Headhouse
LEGEND -Sidewalk
FIXED ELEMENTS
(
200
O
N
M
L
MBTA
PARCEL V
S
T Grate
Off Street
Bike Path
e
100
MBTA
PARCEL W
IL
L
HINGTO
N
Multi Modal
Path
¬
G
e
f
0
NEW WA
S
O
N
M
L
H
¬
V
T Vent
Stack
ST
T
SHEA
CIRCLE
T
Proposed
Signal
(
I
L
O
N
M
O
N
M
L
W
EL
D
O
N
M
L
MBTA
PARCEL U
LL
O
N
M
O¦
N
M
!
O
N
M
L
MBTA
PARKING LOT
EE
O L
N
M
L
O
N
M
Existing
Signal
e
O
N
M
L
A
FO
ST
E
R
LS
L
HI
f
STREET
AD
RO
¬
(
ST
R
O
N
M
L
A
f f
U
CO
¬
¬¬ ¬
G
OR
TO
N
A
LEGEND - FIXED ELEMENTS
H
V G 39
ARNOLD
ARBORETUM
O
N
M
L
HINGTO
N
SP
COURTHOUSE
FITZGERALD LOT
PLANNED
REDEVELOPMENT
MBTA
NEW WA
S
O ¦¬
N
M
L
SHEA
CIRCLE
E
E
R
f f
U
CO
O
N
M
L
A
!
TI
AS
¬
(
A
FO
f
H
D
V G 39
O
N
M
L
O
N
M
L
MBTA
PARCEL V
P
¬
O
N
M
L
¬ ¬¬ A ¬S
G
ARBORW
AY
COURTHOUSE
ARBORW
M AY
OR
TO
N
ST
RE
ET
FITZGERALD LOT
PLANNED
REDEVELOPMENT
MBTA
P
ARBORWAYET
E
YARDTR
S
S
LL
I
H
T
S
E
R
E
O
N
M
L
Touchdown
(where bridge meets surface)
f
f
O
N
M
L
LAB
Bridge Abutment (wall)
!
¬
(
S
A
ARBORWAY
3615 WASHINGTON
YARD
STREET
f
f
¬ ¬¬
L¬
O
N
M
O¬ ¬
N
M
L
ARBORWAY YARD
PLANNED
REDEVELOPMENT
f
H
D
V G 39
ARBORW
AY
G
STATE
SOUTHWEST
CORRIDOR
PARK
STREET
SOUTH
O¬ ¬
N
M
L
ARNOLD
ARBORETUM
Touchdown
(where bridge meets surface)
WA
SH
IN
Touchdown
(where bridge meets surface)
Bridge Abutment (wall)
WASHINGTON
STREET
E
Bridge Abutment (wall)3615
3521 WASHINGTON
STREET
WA
SH
IN
STREET
SOUTH
SOUTHWEST
CORRIDOR
PARK
ARBORW
AY
STATE
LAB
GT
ON
ST
R
Touchdown
(where bridge meets surface)
MBTA
PARCEL W
ARBORWAY YARD
PLANNED
REDEVELOPMENT
f
Bridge Abutment (wall)
E
¬
M
Access
Modified
View
Corridor
Median
Width
9/6/2011
THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
IS PRELIMINARY AND CONCEPTUAL, DESPITE THE HARD-LINE
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
8-FOOT
SIDEWALK
10-FOOT
OFF-ROAD BICYCLE PATH
5-FOOT
BIKE LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
9/6/2011
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
Single Bridge
CONSTRAINTS
Sample of Some of the Trade-Offs
BENEFITS
AT-GRADE
MOBILITY
Does not address taxi relocation, parking issues by Asticou Road
Roadway Operations improved for all modes, future peak regional traffic
volumes accommodated acceptably
No modifications or enhancements to existing transit/bus areas
Under bridge u-turn for access from Morton to New Washington Area removed. Access relocated to redesigned Shea Circle area.
Eliminates courthouse parking under the bridge
Allows for improved pedestrian crossings and connections at grade.
Minimizes the number of street lanes. Allows for improved on- and offstreet bike circulation and connections
LIVABILITY
Interrupts continuity in Emerald Necklace connection
Improved View Corridors between Courthouse and Shea and Arborway
Yards and Housing
Minimizes opportunities for landscaping corridor due to ramps.
Allows for open space treatments along New Washington and between
South Street and Hyde Park Avenue for activities
BRIDGE
MOBILITY
Provides for direct regional connections
Accommodates bike access on bridge in shoulder
LIVABILITY
Bridge and retaining walls disconnect the local neighborhood and activity Reduced overall bridge width lessens shadow impact
centers.
Sight lines remain obstructed to local resources
Height and length of bridge is reduced from existing overpass - overall
bridge width is narrower than Alt 1 - split bridge
COMPARABLE LOCAL MEDIAN WIDTHS
Blue Hill Avenue (at American Legion Highway)
Blue Hill Avenue (at Glenway Street)
COMPARABLE LOCAL CROSSING WIDTHS
American Legion Highway (near Franklin Hill)
CASEY OVERPASS PROJECT
Melnea Cass Boulevard (at Massachusetts Avenue)
DESIGN
ASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
A LT E R N AT I V E S
DRAFT ALTERNATIVE 2 -SINGLE BRIDGE WORK IN PROGRESS
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
ALTERNATIVE
3:
AT
GRADE
WIDE
MEDIAN
DRAFT ALTERNATIVE 3 - WIDE MEDIAN WORK IN PROGRESS
3521 WASHINGTON
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THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
IS PRELIMINARY AND CONCEPTUAL, DESPITE THE HARD-LINE
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
8-FOOT
SIDEWALK
10-FOOT
OFF-ROAD BICYCLE PATH
5-FOOT
BIKE LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
Sample of Some of the Trade-Offs
11-FOOT
TRAVEL LANE
9/6/2011
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
At-Grade - Wide Median
CONSTRAINTS
BENEFITS
AT-GRADE
MOBILITY
Eliminates courhouse parking under the bridge
Roadway Operations improved for all modes, future peak regional traffic
volumes accommodated acceptably
Morton Street/courthouse area loses u-turn for access to New Washington Allows for improved bicycle and pedestrian crossings and connections at
Street area
grade, on and off-street, in all directions to all destinations
Adds a lane in each direction to accommodate regional peak hour traffic Allows for relocation of Route 39 Bus and increases space for MBTA
activities on Washington Street
Increased traffic volumes on New Washington Street
One-way circulation of Morton Street allows for neighborhood access diminishes potential for cut through traffic
Approximately 60 on-street parking spaces accommodated in front of
courthouse
Provides area for improved connection to Southwest Corridor Park
LIVABILITY
Impacts some trees in Shea Circle
Increased landscaping enhances Emerald Necklace - reconnects east-west
surface street missing link
Reduces open space at outside edges of the corridor
Complete daylighting of area with improved linear connections for all
modes. Eliminates shadow impacts and sight line obstructions.
Creates view corridors to historic, architectural, transportation, community
and open spaces features
Allows for active use of median
Allows for growth and expansion of transit and enhancements to MBTA
station
COMPARABLE LOCAL MEDIAN WIDTHS
VFW Parkway (at Baker Street)
VFW Parkway
COMPARABLE LOCAL CROSSING WIDTHS
VFW Parkway (at Centre Street)
CASEY OVERPASS PROJECT
VFW Parkway (at Baker Street)
DESIGN
CASEY OVERPASS - PLANNING AND CONCEPT DESIGN STUDY
A LT E R N AT I V E S
DRAFT ALTERNATIVE 2 -SINGLE BRIDGE WORK IN PROGRESS
CASEY
OVERPASS
PLANNING
AND
CONCEPT
DESIGN
STUDY
ALTERNATIVE 4: AT GRADE - NARROW MEDIAN
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STREET
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THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
MBTA
IS PRELIMINARY
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FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
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T
STREET
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SOUTHWEST
CORRIDOR
PARK
GT
ON
ST
R
Touchdown
(where bridge meets surface)
TATE
LAB
ARBORWAY YARD
PLANNED
REDEVELOPMENT
View
Corridor
Dedicated
Bus Ways
Median
Width
Shea
Square
Parking
Removed
Taxi
THE DESIGNER GENERAL'S WARNING:THE DESIGN SHOWN HERE
IS PRELIMINARY AND CONCEPTUAL, DESPITE THE HARD-LINE
FINISHED STYLE OF THE SOFTWARE PROGRAMS USED.
8-FOOT
SIDEWALK
10-FOOT
OFF-ROAD BICYCLE PATH
5-FOOT
BIKE LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
9/6/2011
5-FOOT
BIKE LANE
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
At-Grade - Narrow Median
CONSTRAINTS
Sample of Some of the Trade-Offs
BENEFITS
AT-GRADE
MOBILITY
Eliminates courhouse parking under the bridge
Roadway Operations improved for all modes, future peak regional traffic
volumes accommodated acceptably
Increased traffic volumes on New Washington Street
Allows for improved bicycle and pedestrian crossings and connections at
grade, on and off-street, in all directions to all destinations
Adds a lane in each direction to accommodate regional peak hour traffic Allows for relocation of Route 39 Bus and increases space for MBTA
activities on Washington Street
Protection for Morton Street may require additional changes - circulation, One-way circulation of Morton Street allows for neighborhood access one-ways, etc.
diminishes potential for cut through traffic
Approximately 60 on-street parking spaces accommodated in front of
courthouse
Provides area for improved connection to Southwest Corridor Park
LIVABILITY
Removes mature trees in Shea Circle
Increased landscaping enhances Emerald Necklace - reconnects east-west
surface street missing link
Reduces open space at outside edges of the corridor
Complete daylighting of area with improved linear connections for all
modes. Eliminates shadow impacts and sight line obstructions.
Creates view corridors to historic, architectural, transportation, community
and open spaces features
Allows for growth and expansion of transit and enhancements to MBTA
station
COMPARABLE LOCAL MEDIAN WIDTHS
Arborway (at Custer Street)
Blue Hill Avenue (at Johnston Road)
COMPARABLE LOCAL CROSSING WIDTHS
Cambridge Street (at Sudbury Street)
CASEY OVERPASS PROJECT
Boylston Street (at Copley Plaza)
VISUALIZING
THE FUTURE
PRELIMINARY PERSPECTIVE RENDERINGS
View 1: Looking towards the courthouse from Arborway Yard
EXISTING
AT-GRADE
BRIDGE
View 2: Looking towards MBTA Forest Hills Station from
Southwest Corridor Path
EXISTING
AT-GRADE
draft
View 3: New Washington Street Corridor
EXISTING
BRIDGE
AT-GRADE
BRIDGE
View 4: Looking towards the Arboretum from South Street
EXISTING
AT-GRADE
CASEY OVERPASS PROJECT
BRIDGE
VISUALIZING
THE FUTURE
Basic Bridge
Terms:
•
•
•
•
•
•
Bridge Approach
Span
Deck
Superstructure
Abutment
Pier
BRIDGE EXAMPLES
Source: HNTB
Architectural treatment of a girder bridge
Example of modern curved
I-girder bridge
Modern steel box girder
bridge
Use of color
Use of textured concrete on approach wall
Architectural treatment of piers
Architectural treatment of railing and fascia
Modern concrete box girder bridge
Modern curved girder viaduct
Typical full height abutment with MSE walls
Use of architectural lighting
Use of girder and pier shape
(Leverett Connector)
Use of under-bridge area for park
CASEY OVERPASS PROJECT
Use of narrow median for bridge piers
Use of wide overhangs
MEASURES OF
E VA L U A T I O N
FINAL Measures of Evaluation - MOEs
Purpose:
8/31/2011
To evaluate each alternative on its own merits in providing the optimal levels of mobility and livability improvements for 2025 (not construction - but over today's operations)
Mobility:
The ability to reach a destination and to use, choose and transfer modes within reasonable time and costs. Mobility is higher when average travel times,
variations in travel times, and travel costs are low. The provision of multi-modal opportunities is essential for good mobility.
Livability: The use of transportation investments to improve the standard of living, the environment, and quality of life for all communities. Livable communities are places where transportation, housing and
commercial development investments have been coordinated so that people have access to adequate, affordable and environmentally sustainable travel options.
Goal 1
#
1.01
1.02
Improve Roadway Geometry to Enhance Circulation for all Modes
and Users
Objective
Minimize local street impacts of cut
through traffic (e.g., minimize local
Enhance pedestrian and bicycle
environment
Goal 4
Measure
Changes in forecast traffic volumes on key local streets
Projected pedestrian level of services (PLOS)
Goal 2
#
2.01
Improve roadway and intersection
operations for vehicles
Vehicle level of Service (LOS) and overall delay
Objective
Measure
Maintain or improve surface loading
points for passengers at Forest Hills
Number of and access to Forest Hills Station loading points
4.02
Minimize adverse water and light
impacts
4.03
Minimize life cycle costs
Goal 5
#
2.02
Number of lanes crossed between respites along east west corridor
Goal 3
#
3.01
3.02
Remove Barriers for Neighborhood Connections and Integrate Transit into Economic
Centers and Residential Areas
Objective
Support access to future development
Initial and Life Cycle Costs
Create a Destination and Sense of Place and Celebrate the Area's Architectural, Transportation and
Open Space History
Objective
Measure
5.02
Goal 6
#
Improve the Visibility, Connectivity and Access to Gateway Open Spaces
Objective
Measure
6.01
Measure of visual quality (vistas, view corridors and views) along and across the
corridor at New Washington Street
Enhance visual quality and increase
Measure of visual quality (vistas, view corridors and views) along the South Street
open vistas, views, view corridors and
and Hyde Park Avenue North South Corridors
access to light and air
Area of shadow cast by bridge
6.02
Create a bridge or at grade design
which reestablishes Emerald Necklace Evaluation of Emerald Necklace Connections
Strengthen neighborhood connections (north/south)
Promote modal connections that reduce
Number of modal connections created
use of personal vehicles
Minimize Light pollution
Enhance value of commercial and
Visual identification of community resources and features
residential buildings through improved
Orientation of building facades to enhance interactions and connectivity to residential
visual or aesthetic changes.
and commercial development
Measure
Allows curb access to development parcels
Manage Storm water run off
5.01
Minimum sidewalk width
Off Peak Vehicle Speed
Number of net trees planted in the study area
Total amount of usable contiguous space
Increase space for community
gatherings or activities and create a
Total amount of usable open space directly connected to/adjacent to abutting land uses
sense of place (e.g., parks,
farmers/artists markets, outdoor public
Creation of areas for community gatherings
gathering space, or similar uses)
Design solution creates a sense of place
Connectivity of bike paths - quality of connections
Improve bikeability and walkability,
bicycle and pedestrian access
Measure
Increase tree canopy
Simplify network - number of turns between specific destinations
Improve Access, Modal and Intermodal Local and Regional Corridor Connections to
Promote Transportation Choices
Objective
4.01
Type/quality of bike path
Projected bike level of services (BLOS)
1.03
#
Integrate Sustainability into Design Concepts
PROJECT OVERVIEW
T
F
T
F
A
A
ACCELERATED
BRIDGE
PROGRAM
(ABP)
TIME
LINE
R
R
D
D
The historic $3 billion Patrick-Murray Accelerated Bridge Program represents a monumental investment in
Massachusetts bridges. This program will greatly reduce the number of structurally deficient bridges in the state
system, while creating thousands of construction jobs on bridge projects.
To complete this program MassDOT will rely on the use of innovative and accelerated project development and
construction techniques. As a result, projects will be completed on-time, on-budget and with minimum disruption to
people and to commerce.
Since 2008, the number of structurally deficient bridges has dropped from 543 to 482, a decline of over 11 percent.
Over the course of the eight year program, more than 200 bridges are planned to be replaced or repaired.
PLANNING
STUDY
DESIGN
2011
DEMOLITION AND CONSTRUCTION
2012
2013
2014
2015
2016
Community Involvement Throughout Project
Select Alternative
Design Review
Construction Staging & Traffic Management
Meetings
Phasing
T
F
A
R
D
T
F
A
R
PLANNING & CONCEPT DESIGN STUDY TIME LINE
D
Planning Study Schedule
PUBLIC MEETINGS
1
EXISTING
CONDITIONS
APR
SELECTION CRITERIA &
INITIAL CONCEPTS
MAY
4
3
2
JUL
RECOMMENDED
ALTERNATIVE
ALTERNATIVES
EVALUATION
CONCEPT
DEVELOPMENT
JUN
5
AUG
OCT
SEP
A
R
T
F
D
CASEY OVERPASS PROJECT
NOV
CONNECTIONS
T
F
A
R
D
T
F
A
R
PEDESTRIAN & BICYCLE CIRCULATION
D
The original 1892 design for this portion of the Arborway, by Frederick
Law Olmsted, utilized separate paths for each mode that were
separated by rows of trees. In the 1890s those modes were horsedrawn vehicles, pleasure riding along a bridle path called “The Ride”
and walking along a pedestrian path. Today’s modes are not all that
different with motorized vehicles, bicycles and pedestrians.
Alternative A - At-Grade
D
WO
R
Crosswalk
Transition Area
SOUTH
Sidewalk
STREE
A
IN
F
T
T
R
PR
OG
Off-Street Bicycle Path
ARB
( W E S O R W AY
T BO
UND
)
ES
S
On-Street Bicycle Lane
AR
( E A S B O R WA
Y
T B
OUN
D)
TO
NG
HI
AS
W
Southwest Corridor
Park
N
ST
RE
ET
Arnold Arboretum
Arborway Gate
RK
ARB ORW AY
( WE ST BOU ND )
ARBO R WAY
(EA ST BOUN D)
FO
RE
ST
HI
LL
R
ST
EE
T
FRO NTA GE ROA D
Franklin Park
ET
UE
EN
AV
RK
DE
PA
MO
HY
W A S H IN
G TO N S
TREET
STRE
C E M E T E RY ROA D
H
SOUT
RT
ON
ST
RE
ET
YALE TER
MO
Arnold Arboretum
Blackwell Path Gate
RT
Forest Hills
Cemetery
KEY
Bicycle Lane
Sidewalk
Off-Road Biicycle Path
UK
RA
IN
Multi-Use Path
E
WA
Crosswalk
Y
Transitional Area
0
100
200
300
400 feet
Casey Overpass Project
Forest Hills
MBTA Station
The area between South Street and Hyde Park Avenue will be an
area of high activity for all modes. The Southwest Corridor Park
will connect to the MBTA Station, Franklin Park and the Forest Hills
Cemetery to the East and Arnold Arboretum to the west.
In this illustration, the rotary at Shea Circle is replaced with a
signalized intersection, reducing the conflicts of cars with pedestrians
and bicycles. New sidewalks and bicycle connections provide access
to Franklin Park and Forest Hills Cemetery.
KE Y
Bi cycle Lane
Sidewalk
Off-Street Bi cycle Path
Multi-U se Path
Crosswalk
Transitional Area
D
A
R
T
F
Acting as an extension of the Southwest Corridor
Park, with separate, side-by-side pedestrian and
bicycle paths, a new network for circulation will
connect open spaces, the MBTA station and other
destinations. These features will be incorporated as
part of a revitalized Emerald Necklace.
Transition areas will be marked where the various
pathways intersect and cross, similar to this photo of the
East Boston Greenway. Sidewalks will be constructed
of concrete and bicycle path of asphalt to differentiate
between modes.
CASEY OVERPASS PROJECT
ON
ST
RE
ET
IMAGINE THE POSSIBILITIES
SO
UT
H
STR
EET
EET
E
K A
VE
NU
MBTA
STATION
E
A
ORCH
ARD HI
LL RO
AD
B
W
AS
HI
NG
M
TO
N
O
RT
ON
ST
RE
ET
ST
RE
ET
COURTHOUSE
ARBORWAY
YARD
C
FO
RE
ST
SHEA
CIRCLE
HI
LL
S
ST
RE
B. Cross Section near Orchard Street
Property Line - Limit of Corridor
ET
The Working Advisory Group was asked to assign the best location for the roadway, sidewalks and bicycle
paths in the corridor.
The Working Group members were given blank cross sections at three locations along with the various
elements to place in the corridor. Each member was free to choose an at-grade scenario, bridge scenario, or
both.
The cross sections shown here are a representative composite of the results.
Approximately 210 Feet
Stone Wall
and Hillside
EACH LINE INDICATES 2 FEET
100’
5-FOOT
BIKE LANE
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
80’
60’
11-FOOT
TRAVEL LANE
40’
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
20’
0
11-FOOT
TRAVEL LANE
20’
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
40’
10-FOOT
OFF-ROAD BICYCLE PATH
8-FOOT
SIDEWALK
60’
80’
100’
10 FEET
The majority of the members chose to work with an at-grade scenario. Common themes were:
• Alignment centered in the corridor
• Planted center median - width varied from narrow to wide
• Included on-street bike lanes rather than shared lanes
• Off-street bicycle path on both sides - with some choosing the north or south side only
T
F
A
R
D
SOUTH
NORTH
Approximately 210 Feet
Stone Wall
and Hillside
5-FOOT
BIKE LANE
8-FOOT
SIDEWALK
EACH LINE INDICATES 2 FEET
100’
80’
11-FOOT
TRAVEL LANE
60’
10-FOOT
OFF-ROAD BICYCLE PATH
11-FOOT
TRAVEL LANE
40’
11-FOOT
TRAVEL LANE
10-FOOT
OFF-ROAD BICYCLE PATH
20’
0
20’
40’
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
Arborway Yard
Property Line - Northern Limit of Corridor
B. Cross Section near Orchard Street
Property Line - Limit of Corridor
8-FOOT
SIDEWALK
60’
80’
100’
10 FEET
The few members who chose to work with a bridge scenario had these common themes:
• Bridge centered in a very wide planted median
• Surface street were to the edge of the corridor
• Pedestrian and bicycle circulation was located in the median
T
F
NORTH
A
R
B. Cross Section near Orchard Street
D
Approximately 210 Feet
Stone Wall
and Hillside
5-FOOT
BIKE LANE
8-FOOT
SIDEWALK
EACH LINE INDICATES 2 FEET
100’
80’
11-FOOT
TRAVEL LANE
60’
11-FOOT
TRAVEL LANE
11-FOOT
TRAVEL LANE
40’
20’
11-FOOT
TRAVEL LANE
5-FOOT
BIKE LANE
0
8-FOOT
SIDEWALK
8-FOOT
SIDEWALK
10-FOOT
OFF-ROAD BICYCLE PATH
20’
40’
Arborway Yard
SOUTH
Property Line - Northern Limit of Corridor
PA
R
Property Line - Limit of Corridor
DE
Arborway Yard
STREET
RED
HY
D
Property Line - Northern Limit of Corridor
STR
SOUTH
ON
A
R
CROSS SECTIONS
ARNOLD
ARBORETUM
T
F
60’
80’
100’
10 FEET
A few members developed alternative approaches:
• The roadway alignment was consolidated on one side of the corridor, maximizing the open space on the other side
• Some were to the north and others to the south and included both bridge an at-grade scenarios.
CASEY OVERPASS PROJECT