traffic-transit slides cp presentation may 25 2010...

DHS Consolidation at St. Elizabeths West Campus Transportation Elements

Transportation AnalysisConsulting Parties MeetingMay 25th, 2010

May 25th, 2010DHS Consolidation at St. ElizabethsWest Campus Transportation Elements

y ,

1

Avoidance/Minimization Alternatives

May 25th, 2010DHS Consolidation at St. ElizabethsWest Campus Transportation Elements 33

•Avoidance Alternative – A2B•Original 4(f)

Avoidance/Minimization Alternatives

•Original 4(f) •Safety issues along I-295 with weave issues at Malcolm X/I-295 and south•Volumes at Firth Sterling/Access Road results in deficient LOS

•Avoidance Alternative – Direct Access•Direct ramps to and from I-295 at West Campus Gate 4

•Violation of AASHTO Design Standards/DDOT Design Standards•FHWA/DDOT Policy Issues

• Minimization Alternative – Alt. 4 Re-alignment of I-295 – Requested by NPS 5-14-2010Minimization Alternative Alt. 4 Re alignment of I 295 Requested by NPS 5 14 2010•Access Roadway and I-295 realigned and move east

•Eliminates future abilities to expand I-295 capacity in the future•Construction/Maintenance operations would impact NPS property•Schedule to complete by 2016 not likelySchedule to complete by 2016 not likely

• Minimization Alternative – Alt. 2 Revised (4-13-2010)•One-way couplet between South Capitol Street and Access Road

•DHS/DDOT Programmatic Issues with heightened securityG t i i•Geometric issues

• Minimization Alternative – Requested by NPS (4-13-2010)•Swap South Capitol Street and I-295

•Geometric issues (Bolling AFB/Anacostia Naval Station, SCS/Suitland, etc)

May 25th, 2010DHS Consolidation at St. ElizabethsWest Campus Transportation Elements

( g )•Schedule to complete by 2016 not likely•Use of DDOT right-of-way not allowed for uses other than interstate facilities

34

Shepherd Parkway Avoidance / Minimization Alternativesat o te at es

Alternative A-2.B


Shepherd Parkway Avoidance / Minimization Alternatives

Alt ti A 2 B ti dAlternative A-2.B continued


Avoidance/Minimization AlternativesDirect Access

Features• Direct ramps to and from Interstate 295 at West Campus Gate 4• Attempts to remove/reduce impacts to park land

Issues• Violation of AASHTO Design Standards & DDOT Design Requirements• FHWA Policy / DDOT Policy Issues• Alignment of I‐295 direct ramps constrained by lateral clearance• Significant aerial structures required:Significant aerial structures required:

• view‐shed issues• major order‐of‐magnitude costs• constructability challenges

• Introduces problems safety, traffic operations due to ramp spacing

SummaryDirect Access Alternative will not satisfy Design Standards, Federal/local Policy requirements and has several similar issues to other avoidance alternatives.


Avoidance/Minimization AlternativesAlternative 4 – Re-alignment of I-295

F tFeatures• Access Roadway

and I-295 realigned and moved east

• Attempts to remove impacts to park landimpacts to park land


Within parkland Within parkland

Avoidance/Minimization AlternativesAlternative 4 – Re-alignment of I-295 - continued

10’ trail in park land(See Point B)

Realignment into park land

Realignment into park land

(See Point A) (See Point C)NB I-295 off-bound ramp

adjacent to park land (See Point D) – could be

maintenance issue

Begin SB I-295 realignment south

Begin NB I-295 realignment south Point A

Begin NB I-295 realignment north

Begin SB I-295 realignment north

SummaryAvoidance Alternative does not remove impacts to park land and does not meet safety and operations requirements. Due to scheduling issues, inability for DDOT to improve I-295 in the future, nor provide for maintenance of I 295 corridor and order ofnor provide for maintenance of I-295 corridor, and order-of-magnitude costs, to constructability issues this alternative does NOT meet the Purpose and Need.

P i BPoint C Point DPoint BPoint C Point D


Avoidance/Minimization AlternativesAlternative 2 Revised

Point A (see below)

Features• One way couplet between South Capitol Street and Access Road

Modification shown on next slidePoint A


Avoidance/Minimization AlternativesAlternative 2 Revised - continued

Point A (see below)

Point B (see below)

Features• Parallel roadway from Gate 4 to Gate 6Parallel roadway from Gate 4 to Gate 6• Minimized road profile

Summary:Alternative 2 Revised (one-way couplet) north of Gate 4 does not meet safety or operation requirements. It cannot provide uninterrupted NB safety or operation requirements. It cannot provide uninterrupted NB traffic in parallel facility. Point A


Point B

Interchange Alternatives


NorthAlternative 1

• Same movements as today to/from I-295


Same movements as today to/from I 295

• Flyover ramp of Malcolm X Avenue for NB direction from Interstate to Access Road

NorthAlternative 3

• Direct access to/from I-295 in all directions


Direct access to/from I 295 in all directions

• Flyover ramp of Malcolm X Avenue for NB direction from Interstate to Access Road

North Alternative 1 Impacts

12-18-09(I-2 Alt) Draft 1 Draft 2 Draft 3 DEIS

4.4

2.1


6.5

North Alternative 3 Impacts

12-18-09(I-2 Alt) Draft 1 Draft 2 Draft 3 DEIS

4.4

2.1


6.5

Overview of Other Transportation Projects in p jWard 8Projects Currently in Development• 11th Street Bridges• South Capitol Street Corridor• South Capitol Street Trail• South Capitol Street Trail• Streetcar System• Martin Luther King Great Street Improvements


Summary of Items that have Changed from West C EISCampus EIS

•TPB/MWCOG model update

•Changes to Land Use in the area including Bolling Air Force Base

• TPB/MWCOG Travel Demand Forecast Model• Most recent land use and transportation network versions• Refined network within study area• Refined network within study area

• Background Conditions• Anacostia Naval Station / Bolling Air Force Base

fi ti d l dreconfiguration and land use • Full integration of South Capitol Street and 11th Street projects• East Campus Development (DCOP / DMPED)

• Revised Transportation Demand Management• Strategies included in detailed analysis


traffic-transit slides cp presentation may 25 2010...

Documents