Post on 19-Jul-2020
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