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© 2014 HDR, all rights reserved. 2016 OTEC Adam Lynch Boosting CRAVE TM with the Power of VISSIM October 26, 2016
© 2014 HDR, all rights reserved.
2016 OTECAdam Lynch
Boosting CRAVETM
with the Power of VISSIM
October 26, 2016
Value Engineering (VE)
Cost Risk Assessment
(CRA)
HDR’s CRAVETM
Importance of Vissim
Topics Covered
Improves the Value
Solution based
More than Cutting
Corners
The TraditionalValue Engineering (VE)
Value = Increase in
Benefits-to-Cost Ratio
Is that enough?
The TraditionalValue Engineering (VE)
What could go wrong?
How much could it cost
What if this risk could be mitigated?
Traditional Cost-Risk Analysis (CRA)
CRA – Loosing great
ideas
VE – Add more risk?
Shortfalls of Independent CRA and VE studies
CRAVE™ combines Cost
Risk Analysis + Value
Engineering in one
coordinated workshop.
Benefits:
o Improves delivery;
o Optimizes solutions
o Mitigates quantified risks
Introducing HDR’s CRAVETM
Proven process
Proven results on a wide range of projects, including:
o Bridges
o Highways
o Heavy and light rail alignments
o Ports
o Airports
o Tunnels
o Water treatment facilities
o Pipelines
Won national awards for process
Proven process(2 to 5 Days)
1. Get up to speed
2. ID Baseline Risk & Performance weights
3. Brainstorm Alts
4. Rank (Fatal Flaws)
5. Preferred VE Alt
6. Analyze
7. Final Score / Report
Risk BaselineContingency: Traditional vs. Risk-Based Approach
Environmental
Requirements
30%
Project Base
Cost
Geotech
20%
Materials
40%
Design
5%
Project Base
Cost
Fixed Contingency %
Hone in Actual Risk-Based Contingency
Threat – Something that
increases Risk
Opportunity –Something that decreases Risk
Risk AssessmentThreat vs. Opportunity
Risk Severity and
Occurrence
“How much would cost
impact if ____ happens?”
Risk Assessment
Brainstorming & Ranking
Analysis depends heavily
on traffic!
CRAVETM onTransportation Projects
Mainline Operations
Local Operations
Maintainability
Construction Impacts
Environmental Impacts
Compatibility
Major urban projects
DDI’s, roundabouts, SPUI’s,
Managed Lanes
Lots of weaving
Highly congested corridors with
strange lane utilization
Complex intersections
Long queuing
Possible Transportation Projects Challenges
Versatile “Fast” Perform
System-wide
Evaluations
Balance of
Presentation &
Results
Using VISSIM with CRAVETM
Case Study: US 18 ( Verona Rd), Madison, WIExisting
Case Study: US 18 ( Verona Rd), Madison, WIBaseline Alternative
Grade Separated Interchange
(10-Lane Structure)
Grade Separated Interchange
(4-Lane Structure)
Traditional
At-Grade Separated
Case Study: US 18 ( Verona Rd), Madison, WIBaseline Alternative
10-lanes!
Case Study: US 18 ( Verona Rd), Madison, WIBrainstorming
Typical “Texas-Style” Frontage Rd Ramp Concept
Mainlines
Frontage Rd
Frontage Rd
Cro
ss S
t
Case Study: US 18 ( Verona Rd), Madison, WIBrainstorming
Modified “Texas-Style” Ramp Concept
a.k.a “X-Ramp”Mainlines
Cross Street
Ramps
Frontage Rd
DDI DDI
Case Study: US 18 ( Verona Rd), Madison, WIPreferred Alternative
At-Grade T Intersection
DDI # 1
DDI # 2
Synchro Import
o Basic geometry
o Signals
Calculated Routing decisions for whole
corridor
MOEs for Baseline alt in VISSIM
Coded CRAVE Preferred Alt
o DDI Interchanges
o Frontage Rd
o Raymond Rd
Apples to Apples Comparison
o Still Conceptual Study
o Minimal Calibration needed
Case Study: US 18 ( Verona Rd), Madison, WIModeling Process
Synchro
Vissim
Increased Benefit-Cost
Ratio
Reduced project Cost!
o$14 million dollars
Success!
Case Study: US 18 ( Verona Rd), Madison, WIResults
Synchro
Vissim
Case Study: US 18 ( Verona Rd), Madison, WI
Vissim Model
QUESTIONS?
