Pavement Preservation Journal - Winter 2017 - 16
FHWA's Every Day Counts Examines
When, Where, How of Preservation
pplying a pavement preservation treatment at the right
time (when), on the right project (where), with quality materials and construction (how) is a critical
investment strategy for optimizing infrastructure
performance, according to the Federal Highway Administration.
The When and Where component of this innovation, as part of
the fourth round of FHWA's Every Day Counts (EDC-4) program,
supports preserving highway investments by managing transportation pavements proactively. The How component promotes
quality construction and materials practices, including treatment
options that apply to both flexible and rigid pavements.
Whether a highway pavement is constructed using asphalt,
concrete or a composite system, traffic loads and environmental
elements will contribute to its deterioration over time. Pavement
preservation treatments can slow this structural decline. When
the right treatment is applied at the right time with quality materials and construction, these practices offer a proven, cost-effective
approach to extending the overall service life of pavements and
achieving smoother, safer roads with fewer costly repairs.
Preservation includes work that is planned and performed to
improve or sustain the condition of the transportation facility in a
IMAGE CREDIT: FHWA
Source: Utah DOT
Pavement Management with "Good Roads Cost Less"
IMAGE CREDIT: FHWA
We will seek to identify a number
of strategies for each asset group
and determine which provides best
value for money while delivering
the required service.
Do-minimum Strategy infrequent but major
Preventative Strategy regular and frequent
Programmed Strategy regular and frequent
Comparison of lifecycle cost for three alternative maintenance strategies
state of good repair. Preservation activities generally do not add
capacity or structural value, but they do restore the transportation facility's overall condition.
Just as pavements differ, so do pavement preservation treatments. There is an array of different analyses, treatments, and
construction methods that can help infrastructure owners achieve
and sustain a desired state of good repair for their transportation
facilities-despite tight budgets.
WHOLE LIFE INVESTMENT
Historically, pavement preservation programs have focused on
applying specific project treatments at specific locations. These
projects demonstrated that the proper application of a treatment
could extend the life of a pavement at a relatively low cost.
However, not all projects were successful due to poor timing,
inappropriate treatments, substandard materials, and inexperienced construction crews. As a result, the policy in many agencies
today is to allow pavements to deteriorate until reconstruction is
the only option, resulting in higher costs and more pavements
in poor condition.
The Right Road, Right Treatment, at the Right Time mantra
was promoted to address these issues. Extensive training by
the asphalt and concrete pavement industries and by FHWA at
the time helped eliminate many of the construction issues and the
improper uses for temporary fixes. While these practices were
valuable to demonstrate the viability of preservation projects,
they were project-based and did not link to pavement management or other strategic processes.
Today's EDC-4 effort supports moving the preservation concept
significantly forward. The focus today in transportation is on
sustaining infrastructure through "whole-life" investments and
quantifying the risks. Pavement preservation has a key role in
managing pavements in these whole-life programs.
For example, a class of pavements with an expected life of
30 years will have several construct/operate/preserve/repair/
restore alternatives and schedules over the expected lifecycle.
Selection of a comprehensive strategy that includes preservation
programs not only meets the performance expectations of the
owners and users, but does so at a cost that is predictable and
affordable. Making this evaluation a key part of pavement policy
is an innovative approach to sustaining pavements in the future.
Under current federal statute on asset management (23
USC 119) and on performance management (23 USC 150), states
are required to include consideration of pavement preservation
as part of their long-term business practices that support federal
funding. This consideration extends to evaluating the benefits
and costs related to the lifecycle analysis for pavements. The
EDC-4 pavement preservation team is focused on assisting state
departments of transportation in this effort.
View past issues of the PAVEMENT PRESERVATION JOURNAL online at www.naylornetwork.com/fpp-nxt