MARK CENTER (BRAC 133) MARK CENTER (BRAC 133) ACCESS STUDYACCESS STUDY

BRAC ADVISORY COMMITTEEBRAC ADVISORY COMMITTEE

October 20, 2010

Alexandria, VA

Study ContextStudy Context• Short / Mid‐term Improvements

– Lower cost– Can be implemented relatively quickly– Require little (mid‐term) or no (short‐term) right‐of‐way

• Study funded jointly between the City & Department of Defense

• Preliminary results being shown tonight, not recommendations

• Seeking feedback from the BRAC Advisory Committee

Study Area MapStudy Area Map

Seminary Rd

Mar

k C

ente

r Dr

Bea

ureg

ard

St

Beau

rega

rd S

t

Mark Center Dr

Seminary Rd

IMPROVEMENT OPTIONSIMPROVEMENT OPTIONS

Improvement Improvement at Location 1at Location 1

Improvements Improvements at Locations 1 & 2at Locations 1 & 2

Improvements Improvements at Locations 1, 2, 5 & 7at Locations 1, 2, 5 & 7

Improvements Improvements at Locations 1, 2, 3, 5 & 7at Locations 1, 2, 3, 5 & 7

Improvements Improvements at Locations 1, 2, 3, 5, 6 & 7at Locations 1, 2, 3, 5, 6 & 7

Improvements at Locations 1, 2, 3, 5, 6 & 7 Improvements at Locations 1, 2, 3, 5, 6 & 7 with Pedestrian Bridgewith Pedestrian Bridge

Short/MidShort/Mid--Term ImprovementsTerm Improvements

Short‐Term Improvements

• No right‐of‐way acquisition anticipated – Option 1

– Option 2 (partial)

– Option 5 (partial)

– Option 6

Mid‐Term Improvements

• Require right‐of‐way acquisition– Option 2 (full)

– Option 5 (full) 

– Option 7

ALTERNATIVE DEVELOPMENTALTERNATIVE DEVELOPMENT

Alternative AAlternative A

Alternative BAlternative B

Alternative CAlternative C

Alternative DAlternative D

Alternative EAlternative E

AM PEAK HOUR AM PEAK HOUR TRAFFIC OPERATIONAL CONDITIONSTRAFFIC OPERATIONAL CONDITIONS

Seminary R

d

Mark Center Dr

Beauregard St

2009 Condition

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

D A

CB

C

D

A

2015 Baseline Conditions2015 Baseline Conditions

• 6400  new employees

• Employee distribution from latest Army TMP (published in July 2010)

• Regional Constrained Long Range Plans (CLRP)– HOT w/o Bus‐Only Ramp and Rotary Improvements

• Proffered improvements under construction

• Pedestrian signal phases included at all local intersections

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

F D

EF

E

F

D

Mark Center Dr

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Avs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

C/F C/D

C/E B/F

D/E

E/F

D/D

Seminary R

d

Beauregard St

Mark Center Dr

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative B vs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

Beauregard St

Seminary R

d

C/F C/D

C/E B/F

D/E

E/F

D/D

Mark Center Dr

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Cvs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

Beauregard St

Seminary R

d

C/F C/D

C/E B/F

D/E

F/F

D/D

Mark Center Dr

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Dvs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

C/F C/D

C/E B/F

D/E

E/F

D/DBeauregard St

Seminary R

d

Mark Center Dr

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Evs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

AM Peak Hour

Beauregard St

Seminary R

d

C/F C/D

C/E B/F

C/E

E/F

D/D

Local Intersection Overall Performance Local Intersection Overall Performance –– AM Peak AM Peak

10000

11000

12000

13000

14000

15000

0

50

100

150

200

250

Baseline  Alt A Alt B Alt C Alt D Alt E

Total Throu

ghpu

t (veh/hr)

Total Delay (sec)

Local Intersection Overall Performance ‐ AM Peak

Total Delay Total Throughput

Rotary Intersection Overall Performance Rotary Intersection Overall Performance –– AM Peak AM Peak

5000

6000

7000

8000

9000

10000

0

50

100

150

200

250

300

350

Baseline  Alt A Alt B Alt C Alt D Alt E

Total Throu

ghpu

t (veh/hr)

Total Delay (sec)

Rotary Intersection Performance ‐ AM Peak

Total Delay Total Throughput

PM PEAK HOUR PM PEAK HOUR TRAFFIC OPERATIONAL CONDITIONSTRAFFIC OPERATIONAL CONDITIONS

Seminary R

d

Mark Center Dr

Beauregard St

2009 Condition

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

C B

CD

D

D

C

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

E D

FE

F

F

F

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Avs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

C/E C/D

F/FE/E

F/F

D/F

C/F

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative B vs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

C/E C/D

F/FE/E

F/F

D/F

D/F

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Cvs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

B/E C/D

F/FE/E

F/F

D/F

C/F

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Dvs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

B/E C/D

F/FE/E

F/F

D/F

C/F

Seminary R

d

Mark Center Dr

Beauregard St

BRAC 133Mark CenterBRAC 133

Mark Center

2015 Alternative Evs. 2015 Baseline

Average QueuesAverage Queuesand Level of Serviceand Level of Service

PM Peak Hour

C/E C/D

F/FD/E

F/F

D/F

C/F

Local Intersection Overall Performance Local Intersection Overall Performance –– PM Peak PM Peak

8000

9000

10000

11000

12000

13000

14000

15000

16000

0

100

200

300

400

500

600

Baseline  Alt A Alt B Alt C Alt D Alt E

Total Throu

ghpu

t (veh/hr)

Total Delay (sec)

Local Intersection Overall Performance ‐ PM Peak

Total Delay Total Throughput

Rotary Intersection Overall Performance Rotary Intersection Overall Performance –– PM Peak PM Peak

6000

7000

8000

9000

10000

11000

0

50

100

150

200

250

Baseline  Alt A Alt B Alt C Alt D Alt E

Total Throu

ghpu

t (veh/hr)

Total Delay (sec)

Rotary Intersection Overall Performance ‐ PM Peak

Total Delay Total Throughput

SUMMARYSUMMARY OFOF ALTERNATIVESALTERNATIVES

39

AlternativeAlternative AAPros

• The second best overall improvements in traffic operations next to Alternative E

• Significantly reduces queue lengths and improves LOS at most intersections 

Cons

• Requires right‐of‐way acquisition

• Intersection of Seminary Rd. / Mark Center Dr. still LOS F in PM 

• Doesn’t resolve the queuing issue out of the Mark Center in PM

AlternativeAlternative BBPros

• The third best overall improvements in traffic operations following E and A

• Significantly reduces queue lengths at most intersections 

Cons

• Requires right‐of‐way acquisition

• In AM, improvements on Seminary Rd WB queues are limited

• Intersection of Seminary Rd. / Mark Center Dr. still LOS F in PM 

• Doesn’t resolve the queuing issue out of the Mark Center in PM

AlternativeAlternative CCPros

• Significantly reduces queue lengths and improves LOS in the study area in AM

• No right‐of‐way acquisition anticipated 

Cons

• No significant improvements in the study area in PM

• Severe queue spilled back from I‐395 SB on‐ramp in PM

• Significant queues and delays on Seminary Rd EB in PM

• Doesn’t resolve the queuing issue out of the Mark Center in PM

AlternativeAlternative DDPros

• Good overall improvements in traffic operations through the study area (similar to Alt B)

• Significantly reduces queue lengths at most intersections

• No right‐of‐way acquisition anticipated 

Cons• In AM, limited improvements on 

Seminary Rd WB at Beauregard St intersection

• In PM, intersection of Seminary Rd/Mark Center Dr still at LOS F

• The dual right turn lanes on Mark Center Dr. significantly reduce the throughput to I‐395 

• Doesn’t resolve the queuing issue out of the Mark Center in PM

AlternativeAlternative EEPros• Best overall traffic operational 

performance

• Significantly reduces queue lengths at most intersections 

• Provides safer accommodation of pedestrians crossing Seminary Rd

Cons• Requires right‐of‐way acquisition

• Would require the construction of pedestrian overpass

• Intersection of Seminary Rd/Mark Center Dr still LOS F in PM 

• Doesn’t resolve the queuing issue out of the Mark Center in PM

Evaluation FactorsEvaluation Factors

• Travel Delay• Traffic Levels of Service (LOS)• Traffic throughputs• Transit and pedestrian movements• Right‐of‐way requirements• Anticipated cost• Utility impacts• Implementation Schedule• Input from the BRAC Advisory Committee and others• VDOT and FHWA approvals

Next StepsNext Steps

• Consider comments received tonight• Evaluation of alternatives• More detailed documentation of alternatives• Further discussions with City of Alexandria, VDOT, FHWA, and DoD

• Final recommendation will be presented to the BRAC Advisory Committee

• Study results documented in report format• Develop engineering design plans• Implement recommendations

Q & AQ & A