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Hunter Mill Road and Sunset Hills Road Study
Community Meeting #6Preferred Alternative Presentation
November 17, 2016
Kristin CalkinsFairfax County Department of Transportation
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Presentation Agenda• Project Objectives• Summary of Prior Community Involvement• Review of Alternatives Considered • Alternative Evaluation Matrix• Staff Preferred Alternative• Next Steps• Questions and Answers
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Project Objectives• Address existing congestion• Plan for future traffic• Address queuing along Hunter Mill Road and
Sunset Hills Road• Improve access to the Dulles Toll Road by
minimizing congestion• Maintain Hunter Mill Road’s character by
applying context sensitive solutions
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Project Study AreaIntersection ID Intersection
CurrentIntersection Control Type
1Hunter Mill Road at Sunrise Valley Drive
Signalized
2Hunter Mill Road at
DTR EB RampsSignalized
3Hunter Mill Road at
DTR WB RampsSignalized
4Hunter Mill Road at
Sunset Hills RoadSignalized
5Hunter Mill Road at
Crowell RoadUnsignalized
(All-Way Stop)
6Hunter Mill Road at Hunting Crest Lane
Unsignalized(Two-Way Stop)
7Hunter Mill Road at
Lake Fairfax ParkUnsignalized
(Two-Way Stop)
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6
5
4 32
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Project Background• Board of Supervisors authorized study as a follow-on study to
the Reston Phase I Plan Amendment (February 11, 2014)• Meetings held on:
• December 8, 2014: Kick-Off • February 24, 2015: Existing & No-Build conditions and community
input on alternatives• May 20, 2015: Analysis Findings
• Project put on hold in July 2015 at request of community to allow for new capacity analysis methodologies for roundabouts to be adopted by the Transportation Research Board in January 2016
• June 30, 2016: Roundabout capacity results• September 15, 2016: Alternatives developed and results presented
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Project Process
Kick
Off
Mee
ting
Existi
ng
Cond
ition
sFu
ture
Con
ditio
ns
Com
mun
ity
Mee
ting
#2
Deve
lopm
ent o
f Al
tern
ative
s
Com
mun
ity
Mee
ting #
3
Proj
ect p
ut
on H
old
Com
mun
ity
Mee
ting
#4
Anal
ysis
of
Alte
rnati
ves
Com
mun
ity
Mee
ting #
5
Sele
ction
of
Pref
erre
d Al
tern
ative
Com
mun
ity
Mee
ting
#6Fin
al R
epor
tIn
corp
orati
on in
to
Com
p Pl
an
PC/B
OS P
ublic
He
arin
gs
24 MONTHS
6
We are Here
Summary of Community Comments• Concern that traffic from Wiehle Avenue may be
diverted to Hunter Mill Road• Concern that the signal at Crowell Road may
increase delays in the off-peak• Maintain the character of Hunter Mill Road• Improve Level of Service (LOS) on Hunter Mill
Road• Roundabouts preferred at Dulles Toll Road ramps
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Summary of Community Comments (Cont.)• Consider widening Hunter Mill Road from eastbound
Dulles Toll Road to Sunrise Valley Drive• Concern that improvements may attract more
development• Community wants an in-depth review of
roundabouts• There should be a mix and match of alternatives• Limit impact to Reston Presbyterian Church• Realign Sunset Hills to limit parcel impacts
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Alternatives Considered
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Crowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
No-BuildCrowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 1ACrowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 1B
Roundabout
Signal Proffered
Alternatives Considered (Cont.)
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Crowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
No-BuildCrowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 2Crowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 3
Signal Proffered
Alternatives Considered (Cont.)
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Crowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
No-BuildCrowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 4ACrowell Road
Sunset Hills Road
Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Alt. 4B
Signal Proffered
Roundabout
Traffic Analysis ResultsTraffic Analysis:
• Performed for both 2030 and 2050• Consistent with VDOT Policies and Procedures • Used new Roundabout Methodology• 2030 – Volumes from Reston Phase I Plan
Amendment• 2050 – Volumes from Reston Network
Analysis (includes new DTR crossings)
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2030 Traffic Analysis Summary
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LOS Standard = LOS D* Alt 2 in new location ** No Build includes the proffered signal at Crowell Road
IntersectionRoundabouts Signals Mix & Match
No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4BOVERALL LOS AM (PM)
Hunter Mill Rd. @Crowell Rd. / Sunset Hills Rd. - - C (B) - D (C) - C (B)
Hunter Mill Rd. @Crowell Rd.** C (C) E (C) - C (C) - C (C) -
Hunter Mill Rd. @Sunset Hills Rd.* D (D) - - D (D) - - -
Hunter Mill Rd. @DTR WB Ramps & Sunset Hills Rd. - D (D) - - - D (D) -
Hunter Mill Rd. @DTR WB Ramps C (E) - B (D) C (D) B (D) - D (C)
Hunter Mill Rd. @DTR EB Ramps C (C) B (B) B (B) C (C) D (C) B (B) E (C)
Hunter Mill Rd. @Sunrise Valley Dr. D (D) C (D) C (D) D (D) C (D) F (F) C (D)
2050 Traffic Analysis Summary
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IntersectionRoundabouts Signals Mix & Match
No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4BOVERALL LOS AM (PM)
Hunter Mill Rd. @Crowell Rd. / Sunset Hills Rd. - - F (B) - F (C) - F (B)
Hunter Mill Rd. @Crowell Rd.** B (C) F (F) - C (B) - C (B) -
Hunter Mill Rd. @Sunset Hills Rd.* C (B) - - E (D) - - -
Hunter Mill Rd. @DTR WB Ramps & Sunset Hills Rd. - F (F) - - - F (F) -
Hunter Mill Rd. @DTR WB Ramps D (C) - C (C) D (C) C (C) - D (C)
Hunter Mill Rd. @DTR EB Ramps E (C) D (B) D (B) E (C) E (C) D (B) E (C)
Hunter Mill Rd. @Sunrise Valley Dr. E (D) D (B) D (B) E (D) E (D) F (E) D (B)
LOS Standard = LOS D* Alt 2 in new location ** No Build includes the proffered signal at Crowell Road
Alternative Comparison Matrix
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* Poor ** Average*** Best
Comparative Metric
Roundabouts Signals Mix & Match
Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4B
Level-of-Service ** ** *** ** * **
Right-of-Way ** * ** ** ** *
Cost ** * *** *** ** **
Community Input *** *** * ** ** **
Constructability * ** *** *** ** **
Alternative Comparison Summary
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• No one alternative outshines the rest• Operations for the alternatives vary• Community input is a important consideration• The “Mix-and-Match” alternatives show promise
Staff Preferred Alternative
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• Roundabout at Crowell Road/Realigned Sunset Hills Road
• Sunset Hills Road realignment adjusted based on community input
• Signals remain at Dulles Toll Road Ramps and Sunrise Valley Drive
Staff Preferred Alternative (Cont.)
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Sunset Hills Road Realignment would be
further designed at implementation
Staff Preferred Alternative (Cont.)
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• Provides for the future travel demand in the corridor• Separates the closely spaced intersections of Sunset
Hills Road and the Westbound Dulles Toll Road Ramps• Roundabout at Crowell Road and Realigned Sunset
Hills Road serves as a transition between northern segment of Hunter Mill Road and the Dulles Toll Road
• Incorporates community desire to see roundabouts in the corridor
Preferred Alternative Traffic Analysis
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Sunrise Valley Drive
Hunt
er M
ill R
oad
WB DTR
EB DTR
Crowell RoadSunset Hills Road Crowell Road
WB DTR
EB DTR
C C
C B
D D
Sunset Hills Road
Hunt
er M
ill R
oad
21 sec./12 sec.
21 sec./44 sec.
34 sec./31 sec.
37 sec./44 sec.
C D
LOS: A, B, C
LOS: D
LOS: E
LOS: F
AM/PM LOS
Key for Levels of Service
Sunrise Valley Drive
2030
Crowell Road
WB DTR
EB DTR
D C
F B
E D
Sunset Hills Road
Hunt
er M
ill R
oad
104 sec./14 sec.
41 sec./32 sec.
67 sec./22 sec.
58 sec./48 sec.
D C
2050
Roundabout
2030 Traffic Analysis Summary
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LOS Standard = LOS D* Alt 2 in new location ** No Build includes the proffered signal at Crowell Road
Intersection
Roundabouts Signals Mix & Match
No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4BStaff Pref. Alt.
OVERALL LOS AM (PM)Hunter Mill Rd. @
Crowell Rd. / Sunset Hills Rd. - - C (B) - D (C) - C (B) C (B)
Hunter Mill Rd. @Crowell Rd.** C (C) E (C) - C (C) - C (C) - -
Hunter Mill Rd. @Sunset Hills Rd.* D (D) - - D (D) - - - -
Hunter Mill Rd. @DTR WB Ramps & Sunset Hills Rd. - D (D) - - - D (D) - -
Hunter Mill Rd. @DTR WB Ramps C (E) - B (D) C (D) B (D) - D (C) C (D)
Hunter Mill Rd. @DTR EB Ramps C (C) B (B) B (B) C (C) D (C) B (B) E (C) C (C)
Hunter Mill Rd. @Sunrise Valley Dr. D (D) C (D) C (D) D (D) C (D) F (F) C (D) D (D)
2050 Traffic Analysis Summary
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Intersection
Roundabouts Signals Mix & Match
No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4B
Staff Pref. Alt.
OVERALL LOS AM (PM)Hunter Mill Rd. @
Crowell Rd. / Sunset Hills Rd. - - F (B) - F (C) - F (B) F (B)Hunter Mill Rd. @
Crowell Rd.** B (C) F (F) - C (B) - C (B) - -Hunter Mill Rd. @Sunset Hills Rd.* C (B) - - E (D) - - - -
Hunter Mill Rd. @DTR WB Ramps & Sunset Hills
Rd.- F (F) - - - F (F) - -
Hunter Mill Rd. @DTR WB Ramps D (C) - C (C) D (C) C (C) - D (C) D (C)
Hunter Mill Rd. @DTR EB Ramps E (C) D (B) D (B) E (C) E (C) D (B) E (C) D (C)
Hunter Mill Rd. @Sunrise Valley Dr. E (D) D (B) D (B) E (D) E (D) F (E) D (B) E (D)
LOS Standard = LOS D* Alt 2 in new location ** No Build includes the proffered signal at Crowell Road
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Next Steps • Evaluate Community Feedback
• Please send comments by December 9, 2016• Finalize Preferred Alternative and complete Final
Report• Incorporate Preferred Alternative into the
Comprehensive Plan• Planning Commission and Board Public Hearings
• Identify funding for implementation• Incorporate in Transportation Priorities Plan
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Question & Answers
30 MinutesPlease limit yourself to one question so others
have an opportunity to ask
http://www.fairfaxcounty.gov/fcdot/huntermillstudy.htm
