Deighton Associates Limited
Marcel Lavigne, Vice President Business Development
November 22nd, 2013
Perth, Australia
The benefits of good pavement
management
Agenda
•
Recent history of Pavement Management
•
Evolution in recent years
•
Impact on PMS
•
Why use a PMS?
•
Prioritization vs Optimization
•
Why not use optimization?
•
Tools available
•
Conclusion
A quick peek at history
Milestones: Pavement Management
Source: Ralph Haas, 2001
Processing power: X 1000
Source: Wikipedia,
Author WGSimon
Processing speed X 500
Impact on Pavement Management
•
•
•
•
•
•
•
•
Automated data collection
Development of high-performance PMS
Increased complexity of analysis scenarios
More powerful algorithms and models
Faster processing of metadata
Quicker analysis
Faster outputs
Optimization of analysis
Why use a PMS?
•
•
•
•
Ability to manage large networks
Share and exchange information
More objective look at alternatives
Access to historical and actual data as
well as projections
• Capability of managing assets through
their life cycle
• Ease to produce “what ifs”
• Easily produce reports
Why use a PMS?
Life Cycle Cost Analysis
Optimization
• Definition:
– Optimization chooses the strategies that maximise
the outcome, defined by the user, while adhering
to a set of constraints such as budget or minimum
level of service. It can be defined as a tool within
a good Pavement Management System that
provides you with quantitative feedback and
suggestions, ultimately allowing you to knowingly
revise a program by using your judgment to weigh
political, engineering and economic factors.
Optimization vs Prioritization
• Prioritization = Ranking
• Limitations of ranking:
– What is vs What will be
– Insufficient focus on impact to overall network
– Does not deal with time scale
– May result from subjective selection rules
– Does not address capacity vs demand issues
• Ranking = Worst first
Prioritisation: Ranking vs dTIMS Optimisation
Capability
Engineering judgement
Decision tree
Performance modelling
Alternative options
Life cycle costing
Economics (BCR)
Network level performance
Simplicity
Tactical analysis
Strategic analysis
Source: P. Kadar, ARRB
Ranking
Optimisation
Optimization vs Prioritization
Optimization vs Prioritization
COSTS OVER 20 YEARS: OPTIMIZED= 80% OF RANKING COSTS
Source: T. Henning, NZTA, 2013
dTIMS: A strategic planning
tool
Your chance to shape the future
• dTIMS is a Strategic Level tool
• It models the performance of
your assets
• It provides clarity WRT your
options
• Over a long time/traffic
• In respect of your constraints
(budget, LOS, risk levels, etc.)
• Evaluates thousands of potential
maintenance strategies
• Recommends the strategies with
the highest ROI (meeting your
constraints)
Conclusion
• "There should be a desire for change by skillful
professionals who can make a difference in the
way decisions are made and which will result in
reduced costs and improved performance," said
Dr. Tom Larson, a former FHWA administrator, as
part of his remarks at the 1985 International
Conference on Pavement Management. He
pointed out that "without dollars there will be no
need for pavement management and without
good management there will not be enough
dollars to go around."