Hunter Mill Road and Sunset Hills Road Study, Community Meeting #6: Nov. 17, 2016

1. Hunter Mill Road and Sunset Hills
Road Study
Community Meeting #6
Preferred Alternative Presentation
November 17, 2016
Kristin Calkins
Fairfax County Department of Transportation

2. Presentation Agenda
• Project Objectives
• Summary of Prior Community Involvement
• Review of Alternatives Considered
• Alternative Evaluation Matrix
• Staff Preferred Alternative
• Next Steps
• Questions and Answers
2

3. 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
3

4. Project Study Area
4
Intersection ID Intersection
Current
Intersection
Control Type
1
Hunter Mill Road at
Sunrise Valley Drive
Signalized
2
Hunter Mill Road at
DTR EB Ramps
Signalized
3
Hunter Mill Road at
DTR WB Ramps
Signalized
4
Hunter Mill Road at
Sunset Hills Road
Signalized
5
Hunter Mill Road at
Crowell Road
Unsignalized
(All-Way Stop)
6
Hunter Mill Road at
Hunting Crest Lane
Unsignalized
(Two-Way Stop)
7
Hunter Mill Road at
Lake Fairfax Park
Unsignalized
(Two-Way Stop)
7
6
5
43
2
1

5. 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
5

6. Project Process
24 MONTHS
6
We are Here

7. 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
7

8. 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
8

9. Alternatives Considered
9
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
No-Build
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 1A
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 1B
Roundabout
Signal Proffered

10. Alternatives Considered (Cont.)
10
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
No-Build
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 2
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 3
Signal Proffered

11. Alternatives Considered (Cont.)
11
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
No-Build
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 4A
Crowell Road
Sunset Hills Road
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Alt. 4B
Signal Proffered
Roundabout

12. Traffic Analysis Results
Traffic 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)
12

13. 2030 Traffic Analysis Summary
13
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. 4B
OVERALL 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)

14. 2050 Traffic Analysis Summary
14
Intersection
Roundabouts Signals Mix & Match
No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4B
OVERALL 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

15. Alternative Comparison Matrix
15
* 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 * ** *** *** ** **

16. Alternative Comparison Summary
16
• No one alternative outshines the rest
• Operations for the alternatives vary
• Community input is a important consideration
• The “Mix-and-Match” alternatives show promise

17. Staff Preferred Alternative
17
• 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

18. Staff Preferred Alternative (Cont.)
18
Sunset Hills Road
Realignment would be
further designed at
implementation

19. Staff Preferred Alternative (Cont.)
19
• 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

20. Preferred Alternative Traffic Analysis
20
Sunrise Valley Drive
HunterMillRoad
WB DTR
EB DTR
Crowell RoadSunset Hills Road Crowell Road
WB DTR
EB DTR
C C
C B
D D
Sunset Hills Road
HunterMillRoad
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
HunterMillRoad
104 sec./14 sec.
41 sec./32 sec.
67 sec./22 sec.
58 sec./48 sec.
D C
2050
Roundabout

21. 2030 Traffic Analysis Summary
21
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. 4B
Staff
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)

22. 2050 Traffic Analysis Summary
22
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

23. 23
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

24. 24
Question & Answers
30 Minutes
Please limit yourself to one question so others
have an opportunity to ask
Kristin.Calkins@Fairfaxcounty.gov
http://www.fairfaxcounty.gov/fcdot/huntermillstudy.htm