395 - GSA Development of St. Elizabeths Campus

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2.4.2 Build Transportation Alternative 2Alternative 2 describes the first of two recommended transportation improvement plans thatare chosen for further analysis for the Build scenario, which assumes that DHS consolidationand relocation to St. Elizabeths does occur. Transportation improvements suggested under thisalternative include providing new access to St. Elizabeths, modifying existing connectionsbetween network links in the vicinity, and changing roadway geometry and operations toimprove efficiency. For the key improvement of Malcolm X Avenue at I-295 in this alternative,the cost estimate is $92.2 million. It would also require taking some 10.2 acres of NPS Parkland.Specific transportation improvements suggested under this alternative for the West and EastCampuses and surrounding network are listed below:• A new north-south three-lane arterial called the West Access Road, which providesvehicle and pedestrian connections between Firth Sterling Avenue and Malcolm XAvenue, will be built. The north portion of the West Access Road between Gate 4 andFirth Sterling Avenue is included in the amended Record of Decision (September 28,2011) issued as part of the TIER I EIS for the West Campus therefore it is included in NoAction alternative. In the Alternative 2, the West Access Road will be extended fromGate 4 to the south to connect with Malcolm X Avenue at a reconfigured 4-leg signalizedintersection and to connect with I-295 and South Capitol Street via a fly-over rampconnection, a new elevated signalized intersection and new slip ramps. The extension ofWest Access Road will include two inbound lanes and one outbound lane.• The I-295/Malcolm X Avenue interchange is modified as follows:- Replace the existing I-295 NB loop off-ramp with a new one-lane slip ramp furthersouth to connect to a collector-distributor road which then connects to a newelevated signalized intersection- Remove the existing I-295 SB fly-over ramp to SCS and replace with a new one-laneoff-ramp that connects directly to the elevated signalized intersection- A two-lane roadway will allow traffic access the reconfigured Malcolm X Avenueintersection from the elevated intersection- A two-lane-two way fly-over ramp will connect between West Access Road and theelevated intersection- A one-lane fly-over ramp will allow traffic to access I-295 SB from the elevatedintersection- Bicycle accommodation is included as outlined in the SCS improvements including abike lane on SCS in both directions from Suitland Parkway to SCS (south end)• A new one-lane slip ramp will connect the SCS NB to the collector-distributor road inorder to access Malcolm X Avenue or West Access Road.• The South Capitol Street/Malcolm X Avenue interchange will remain the same.• Martin Luther King Jr. Avenue will be modified. Between Golden Raintree Drive andLebaum Street it will have sidewalks, buffer and five travel lanes including a center twoway-left-turn(TWLT) lane; from Lebaum Street to Alabama Avenue it will have2-10
sidewalks, buffer area, parking on both sides, five travel lanes and a raised median withleft turn bays. In addition, a new signal is installed at the Martin Luther King Jr.Avenue/DHS Gate 2 intersection.• The estimated construction cost for Alternative 2 is approximately $105 million,including $92.2 million for the I-295/SCS/Malcolm corridors and $12.8 million for theMLK Jr. Avenue corridor.Traffic operation analysis for Alternative 2 is provided in Section 5.5 of this document.2.4.3 Build Transportation Alternative 2 ModifiedAlternative 2 Modified describes the second of two recommended transportation improvementplans that are chosen for further analysis for the Build scenario, which assumes that DHSconsolidation and relocation to St. Elizabeths does occur. Transportation improvementssuggested under this alternative for the West and East Campuses and surrounding network arelisted below:• Similar to Alternative 2, the West Access Road will be extended to the south to MalcolmAvenue and to a new elevated signalized intersection to tie to I-295 and SCS. Howeverthe fly-over ramp is modified to minimize construction footprint.• At the I-295/Malcolm X Avenue interchange, similar improvements to Alternative 2 areproposed except:- Change configuration of the two new fly-over ramps from/to I-295 so that only onenew bridge is needed to be constructed over I-295- The new I-295 NB on-ramps from both EB and WB Malcolm X Avenue merge firstinto one single collector-distributor road before further merging onto I-295 NB.Realign the new connection from the new elevated signalized intersection to theMalcolm X Avenue to minimize impact to the adjacent NPS land• Martin Luther King Jr. Avenue will be modified. Between Golden Raintree Drive andLebaum Street it will have sidewalks, buffer and five travel lanes including a centerTWLT lane; from Lebaum Street to Alabama Avenue it will have sidewalks, buffer area,parking on both sides, five travel lanes and a raised median with left turn bays. Inaddition, a new signal is installed at the Martin Luther King Jr. Avenue/DHS Gate 2intersection.• Shuttle buses will provide service from the two nearby Metrorail stations of Anacostiaand Congress Heights to the West and East Campus gates, with details still beingworked out with WMATA.• The estimated construction cost for Alternative 2 Modified is approximately $123.7million, including $114.4 million for the I-295/SCS/Malcolm corridors and $9.3 millionfor the MLK Jr. Avenue corridor.• It would require taking some 9.2 acres of NPS Parkland.• Details of the Alternative 2 Modified are provided in the following sections.2-11
Page 1: Department of Homeland Security Hea
Page 4 and 5: Contents1 INTRODUCTION ............
Page 6 and 7: List of Figures:FIGURE 1-1: PROJECT
Page 8 and 9: List of Tables:TABLE 3-1: ROADWAY P
Page 10 and 11: 1 Introduction1.1 Project Descripti
Page 12 and 13: FREDERICKCOUNTYBALTIMORELOUDOUNCOUN
Page 14 and 15: MLK JR. AVELegendVarious ForestedMi
Page 16 and 17: 0 1,250 2,500 5,000 FeetW STFREDERI
Page 18 and 19: The purpose of this TTR document is
Page 20 and 21: transportation hub because of its l
Page 22 and 23: travelling westbound (in morning pe
Page 24 and 25: 2.3.1 SocioeconomicForecasts for th
Page 26 and 27: Headquarters to St. Elizabeths and
Page 30 and 31: 2.4.3.1 Interchange of Malcolm X Av
Page 32 and 33: Campus. The West Access Road would

395 - GSA Development of St. Elizabeths Campus

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