diverging diamond interchange: i-66 and route 15
TRANSCRIPT
Opening of the Diverging Diamond InterchangeInterstate 66/Route 15 in Prince William County
Public Information Meeting
Christiana Briganti-Dunn, PE, CCMDesign-Build Program ManagerVirginia Department of Transportation
Jan A. ShermanDesign-Build Project Manager The Lane Construction Corporation
December 7 and 13, 2016
Tonight’s Meeting
• Project Status• Opening the Diverging Diamond Interchange• Detour for One Night• How to Navigate through the New DDI• Project Schedule and Cost Updates• Stations Around the Room:
• Simulation Videos• FHWA Alternative Intersections Video• Interactive Exhibit
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Project Status(Items in Orange are Complete, Blue are Ongoing)
• Reconstruct I-66/Route 15 interchange as a Diverging Diamond Interchange (DDI)
• Replace Route 15 bridges over I-66• Retaining walls, shared-use path, partial interchange
lighting, fencing, and architectural treatments• Geometric and access management improvements to
ramps, intersections, Route 55, and frontage road• Provide drainage and stormwater management facilities • Replace/modify traffic signals, signs and sign structures,
and guardrail/barrier• Construct a sound barrier Wall• Landscaping (will be completed under separate contract)
Opening the DDI Configuration
• Close interchange and detour traffic starting 8 p.m. Friday, Jan. 6 (or Jan. 13, weather depending), to place final pavement markings• Route 15 closed from south of Heathcote Blvd to north
of Route 55/Washington St• Ramps to and from I-66 will also be closed• Local traffic will be detoured to Old Carolina Rd/
Jefferson St• Interstate traffic use Route 29 in Gainesville
• Open DDI to traffic by 9 a.m. Saturday, Jan. 7 (or Jan. 14)• All ramps to and from the Interstate 66• Two lanes in each direction on Route 15
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Detour – Night of Jan. 6 (or Jan. 13)
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Diverging Diamond InterchangeTraffic Flow
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Diverging Diamond InterchangeTraffic Flow
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Project Schedule
Contract awarded May 2014
Public information meeting October 2014
Began right-of-way acquisition Winter 2014
Began construction Spring Fall 2015*
Open DDI configuration January 2017
Project completion Fall Summer 2017
* Project construction is approximately 70% complete.
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Project Costs
Preliminary engineering: $3 Million
Right-of-way acquisition andrelocation assistance: $8 Million
Design/Build contract (final design,utility relocation, and construction),Contingency and VDOT oversight: $48 Million
Total cost: $59 Million
The above estimate has remain unchanged since October 2014.The project is fully funded by state and federal funds.
Stations Around the Room• VISSIM simulation videos
• Based on actual design for DDI in Haymarket• Shows future 2036 traffic volumes, AM and PM peaks
• FHWA Alternative Intersections Video – “As easy as 1-2-3”: • To Turn Left – Stay to the Left • To Turn Right – Stay to the Right• No Turns at Crossover Intersections – Go “Straight”
• Interactive exhibit• Attendees are invited to “walk” through the DDI exhibit
the way they would drive through one
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For More Information…http://www.virginiadot.org/projects/northernvirginia/i-66_and_route_15_interchange.asp
OR:• Visit www.virginiadot.org
• Click on “Projects and Studies” in the orange bar• Click on the “Northern Virginia” portion of the map• Scroll to “Under Construction” and look for “I-66 and
Route 15 Interchange Reconstruction” link
Project Manager: Christiana Briganti-Dunn, P.E., CCMPhone: 703-259-2960E-mail: [email protected]
Traffic Comparison to VDOT’s 1st DDI
180 270 1200
120
450 310
300 90
700 180
600
160
Zion Crossroads DDI
1500670
1110720
I-64 WBOff-Ramp
I-64 WBOn-Ramp
I-64 EBOn-Ramp
I-64 EBOff-Ramp
US Route 15
I-64
2010 AM Peak
40 1160 3200
200
40 600
580 780
510 810
1300
100
Haymarket DDI
5701520
1010
2880
I-66 WBOff-Ramp
I-66 WBOn-Ramp
I-66 EBOn-Ramp
I-66 EBOff-Ramp
US Route 15
I-66
2011 AM Peak
80 530 1400
140
150 480
550 120
440 150
1900
350
Zion Crossroads DDI
10701720
11201450
I-64 WBOff-Ramp
I-64 WBOn-Ramp
I-64 EBOn-Ramp
I-64 EBOff-Ramp
US Route 15
I-64
2010 PM Peak
110 1010 7400
880
140 580
1510 380
680 310
400
50
Haymarket DDI
1130740
25001340
I-66 WBOff-Ramp
I-66 WBOn-Ramp
I-66 EBOn-Ramp
I-66 EBOff-Ramp
US Route 15
I-66
2011 PM Peak
Traffic Comparison to VDOT’s 1st DDI
How Haymarket DDI differs from Zion Crossroads DDI
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Triple Left
Dual Left
3 Lanes NB/SB
SingleRight
Spur Ramp to H