Juniper Lane Connectivity Study: Community Meeting #2 - Sept. 26, 2018

County of Fairfax, Virginia
Juniper Lane
Connectivity Study
Community Meeting #2
September 26, 2018
Fairfax County Department of Transportation

Agenda
•Recap of project purpose
•Assessment of options
–High level-observations
–Background to analysis
–Evaluation of individual options
–Summary overview
•Next steps
Department of Transportation
2

RECAP OF PROJECT PURPOSE

Study Objectives
• Identify strategies to limit cut-through traffic
• Reduce traffic impacts associated with
redevelopment
• Improve neighborhood connectivity
• Maintain adequate access between Juniper Lane
and Patrick Henry Drive
• Enhance traffic operations in the study area
• Consider bicycle and pedestrian conditions
4

Comprehensive Plan - Leesburg Pike Village Concept
5
539,000 SF of mixed-use
development across 3 parcels
Source: Fairfax County Comprehensive Plan, pg. 167

6
539,000 SF of mixed-use
development across 3 parcels
1
2
3
1 – Commercial/Office
2 – Residential/Commercial
3 – Residential (townhomes)
Source: Fairfax County Comprehensive Plan, pg. 167
Comprehensive Plan - Leesburg Pike Village Concept

Roadway Network Study Options
Current Comprehensive Plan
Option 1 Option 2 Option 3 Option 4
Option 5 Option 6 Option 7 Option 8

Modifications to Study Options Prior to Analysis
200’
340’
540’
200’
140’
370’
Previous Assumed
Maintaining existing signal location:
• Limits impacts to adjacent
developments
• Allows for more favorable spacing
from potential signal at future
spine road

Option 6
Option 6
Modifications to Study Options Prior to Analysis
= New road connection
= Existing road removed
= Traffic signal

Site-Generated Trips
• Forecast number of trips generated
by the redeveloped site determined
using standard reference
– (ITE’s Trip Generation Manual, 10th
Edition)
• Site trips distributed to the network
using existing (2018) traffic
patterns
– Trips rerouted within each option
based on available connections
Weekday
Daily
Peak Hour Adjacent Street
Weekday AM
Peak Hour
Weekday PM Peak
Hour
Total In Out Total In Out
New Trips 7,021 260 156 104 497 305 192

ASSESSMENT OF OPTIONS

High-Level Observations
• The overall network is expected to function
acceptably for all options studied
–Impacts to individual vehicular movements discussed subsequently
• Cut-through trips likely in options with
neighborhood connections
• County thresholds for turn-restrictions to/from
Juniper Lane not likely to be met under any
scenario
–This does not preclude the application of other traffic calming
measures (e.g., curb extensions) to help discourage new through
traffic through neighborhoods

Traffic Calming Toolbox

A few quick things before jumping into results:
• Level of Service Concept
• Intersection Legend (for your reference)

Level of Service (LOS) Concept

AM Intersection LOS Summaries*
*Refer to handout throughout subsequent slides
**LOS C for Option 7
Intersection Information
Options
1 2 3 4 5 6 7 8
LOS Delay (seconds)
1
Route 7 (Leesburg Pike) &
Site Driveway/Seven Corners Center
Unsignalized B 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0
2
Seven Corners Center
Signalized B** 16.8 18.4 18.4 16.7 18.7 20.1 19.1 19.9
4 Route 7 (Leesburg Pike) & Patrick Henry Dr Signalized D 46.1 41.2 41.2 43.6 41.5 43.7 53.1 42.6
5 Patrick Henry Dr & Site Parcel #3 Access Unsignalized B** 13.6 12.7 12.7 13.3 13.8 13.0 15.2 13.0
6 Nicholson St & Valley Ln Unsignalized A 9.1 8.8 8.8 8.8 8.8 8.8 8.8 8.8
7 Patrick Henry Dr & Site Driveway Unsignalized B 13.8 - - 13.5 14.2 - - -
8 Juniper Ln & Nicholson St Unsignalized A 9.1 0.0 - - - - - -
9 New Site Collector Rd & Juniper Ln Unsignalized A 9.1 - - 9.0 - - - -
10 New Site Collector Rd & Site Dwy B Unsignalized A 0.0 0.0 0.0 0.0 - - - -
11 Patrick Henry Dr & Service Road Signalized D - - - - - - 47.4 -

PM Intersection LOS Summaries*
**Intersection 1: LOS C for Option 8; Intersection 2: LOS C for Option 1; Intersection 4: LOS D for Options 5,6,8 and
LOS E for Option 7; Intersection 9: LOS B for Option 1
Intersection Information
Options
1 2 3 4 5 6 7 8
LOS Delay (seconds)
1
Site Driveway/Seven Corners Center
Unsignalized B** 14.0 13.0 13.0 13.0 13.0 13.0 13.0 15.0
2
Seven Corners Center
Signalized D** 34.1 36.6 36.6 35.9 38.2 38.2 38.0 39.6
4 Route 7 (Leesburg Pike) & Patrick Henry Dr Signalized C** 34.3 33.4 33.4 34.2 40.1 40.1 56.1 42.6
5 Patrick Henry Dr & Site Parcel #3 Access Unsignalized B 12.2 11.6 11.6 11.5 12.0 12.0 12.8 11.4
6 Nicholson St & Valley Ln Unsignalized A 9.4 8.5 8.5 8.5 8.5 8.5 8.5 8.5
7 Patrick Henry Dr & Site Driveway Unsignalized B 11.8 - - 11.5 12.0 - - -
8 Juniper Ln & Nicholson St Unsignalized A 9.4 0.0 - - - - - -
9 New Site Collector Rd & Juniper Ln Unsignalized A** 10.2 - - 9.3 - - - -
10 New Site Collector Rd & Site Dwy B Unsignalized A 0.0 0.0 0.0 0.0 - - - -
11 Patrick Henry Dr & Service Road Signalized C - - - - - - 28.5 -

Intersection Legend*
1
5
7
96
8
11
4
10
1. Route 7/Northern Site
Dwy A
2. Route 7/Seven Corners
Center/Site Dwy B
4. Route 7/Patrick Henry Dr
5. Patrick Henry Drive/Site
Dwy C
6. Nicholson St/Valley Ln
7. Patrick Henry Drive/New
Site Connector
8. Juniper Ln/Nicholson St
9. Juniper Lane/New Site
Connector
10. Site Dwy B/New Site
Connector
11. Patrick Henry Dr/Leesburg
Pike Service Rd
2

Option 1: Maximum Connections
• Increased connections to and within adjacent
neighborhood
• Allows for better bike and pedestrian connections
to the adjacent neighborhood
• Expected vehicle cut-through traffic from Patrick
Henry Drive/Route 7
• Traffic calming serves as an option for mitigating
cut-through vehicles
• Removes service road which allows for more
standard intersections
• Potential queueing along Patrick Henry from exiting
site vehicles
Level of Service:
– Intersection 2: Shortest AM
and PM delay
2
= Traffic signal

Level of Service:
– No notable change relative
to current Comprehensive
Plan
Option 2: Moderate Connections
• Connects trips from Juniper and Patrick Henry
Drive directly to parcels
• Marginally diminished access to parcels
neighborhood
• Allows for better bike and pedestrian
connections to the adjacent neighborhood
• Potential for neighborhood vehicle cut-through
= Traffic signal

Option 3: Minimal Connections
• Provides direct access to parcels from Juniper
• Three site access points to distribute entering and
exiting vehicles
• Neighborhood connections remain unchanged
• Marginally diminished access to parcels
Level of Service:
– No notable change relative
to current Comprehensive
Plan
= Traffic signal

Level of Service:
– Intersection 2: Shortest AM
and PM delay
Option 4: Site Connections
• Provides direct access to parcels from Juniper
Lane and Patrick Henry Dr
• Direct access to parcels from Patrick Henry and
Juniper Lane relieves traffic along Route 7 and
diminishes intersection delay at intersection 2
• Potential queueing along Patrick Henry from exiting
site vehicles
2
= Traffic signal

Option 5: Moderate Connections
• Doesn’t provide direct access to sites from Juniper
Lane or Patrick Henry Dr
• May encourage redirecting vehicles onto Juniper
Lane
neighborhood
Level of Service:
– Intersection 4: Higher PM
delay, LOS D
4
= Traffic signal

Level of Service:
– Intersection 2: Small increase
in AM delay, LOS C
delay, LOS D
Option 6: Neighborhood Connections
• Limits access to sites from neighborhoods
neighborhood
2
4
= Traffic signal

Option 7: Current Comprehensive Plan
• Minimal change from existing conditions
• Continued poor intersection operations with
service road at intersection 4
• Diminished intersection LOS
Level of Service:
– Intersection 4: Highest AM delay
– Intersection 4: Highest PM
delay, LOS E
– Intersection 5: Highest AM
delay, LOS C
– Only option that keeps
intersection 11: AM LOS D, PM
LOS C
411
5
= Traffic signal

Level of Service:
– Intersection 1: Small increase
in PM delay, LOS C
delay, LOS D
Option 8: Minimal Connections
• Doesn’t provide direct access to parcels from
Juniper Lane or Patrick Henry Dr
• Minimal change from existing conditions
4
1
= Traffic signal

Option 1 Option 2 Option 3 Option 4 Option 5 Option 6 Option 7 Option 8
Nicholson Street
Connection ✓ ✓ X X X ✓ X X
Relieving traffic along
Route 7 by connecting NE
bound travelers from
Juniper directly to Parcels
✓ ✓
Access to Parcels
1 and 2 but not
site 3
✓
Access to site 3
but not 1 and 2
X ✓ X
Relieving traffic along
Route 7 by connecting NE
bound travelers from
Patrick Henry directly to
Parcels
✓ X X ✓ X X X X
Anticipated increased NBL
demand at Patrick Henry /
Route 7 intersection due to
direct access to Sites 1 and
2
✓ X X ✓ ✓ X X X
Potential queuing vehicles
exiting Parcels and turning
LB on Patrick Henry toward
Route 7
✓ X X ✓ ✓ X X X
Increased pressure on
intersection 2 for NBL
vehicles exiting Parcels 1
and 2
X
Vehicles able to
divert through
Nicholson
✓ X ✓ ✓ ✓ ✓
Potential increased use of
Juniper Ln as alternative
route
✓ ✓ ✓ ✓ X X X X
Minimized
bicycle/pedestrian conflict
areas at site access points
X X
4 conflict areas at
intersections 1, 2,
10, and 9
X
Four conflict
areas at
intersections 1, 2,
9 and 7
✓ ✓ ✓

Next Steps
• Identify preferred option(s)
• Preferred option(s) will undergo additional analysis:
–Graphical renderings
–SimTraffic simulation analysis for additional MOEs (e.g., queuing, travel
time)
–Direct comparison between options
–Additional analysis/focus areas of particular community interest

Additional Questions and Discussion
• Contact:
John King
Phone: 703-877-5840
E-mail: john.king2@fairfaxcounty.gov

Juniper Lane Connectivity Study: Community Meeting #2 - Sept. 26, 2018

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Juniper Lane Connectivity Study: Community Meeting #2 - Sept. 26, 2018