Pavement Preservation Journal - Spring 2018 - 13

emulsions or polymer-modified asphalt
emulsions as compared to conventional
or modified asphalt binders used in
pavement construction.
* The construction processes used for preservation treatments differ from those for
traditional pavement construction. For
example, an important measure for chip
seal success is the embedment depth of
the aggregate, whereas compaction density is a measure of quality for flexible
pavement construction.
Much more information is available in
this 158-page book. NCHRP 857 may be
downloaded at no charge at http://nap.
edu/24945.
DELAYED MAINTENANCE
Also published in 2017, NCHRP 859:
Consequences of Delayed Maintenance
of Highway Assets describes the consequences of delayed maintenance of highway assets in a way that considers asset
preservation policy, maintenance and
budget needs, with analyses of delayed
maintenance scenarios.
Written by Carlos M. Chang, Soheil
Nazarian and Marketa Vavrova, University
of Texas at El Paso; Margot T. Yapp and
Linda M. Pierce, Nichols Consulting
Engineers, Reno; William Robert, Spy
Pond Partners, LLC; and Roger E. Smith,
College Station, Tex., NCHRP 859 will be
of immediate interest to state maintenance engineers and others involved in
the different aspects of asset maintenance
and preservation.
"Analytical tools are currently available
to quantify the effects of the application
of maintenance treatments for highway
pavements, bridges, and other assets,"
writes Amir Hanna. "However, processes
for using these tools to demonstrate
the potential savings and performance
enhancements that result from applying
maintenance treatments at the right time
are not readily available.
"Research was needed to develop such
processes to help highway agencies better
assess the economic benefits of maintenance actions and their role in enhancing
the level of service of the highway system,"
Hanna adds. "In addition, incorporating
these processes in asset management systems would provide a means for optimizing
the allocation of resources."

The report defines delayed maintenance as work needed to preserve
the highway system, but postponed in
the agency's maintenance program. It's
applied to all the highway asset groups
examined: pavements, bridges, culverts,
guardrails, lighting, pavement markings,
and signs, although it is understood that
each asset group has unique maintenance
policies, condition assessment, deterioration rates, service life, and lifecycle costs,
NCHRP 859 says.
The report quantifies the consequences
of delayed maintenance by comparing the
outcomes of a preferred preservation policy
established by the agency with the outcomes of delayed maintenance scenarios.
"The information used to show the
consequences of delayed maintenance
includes: asset condition, remaining service
life, agency costs in terms of the budget
needs and backlogged costs, and asset
value," the report says.
Examples illustrate the application of
the report framework to the various asset
groups. The scenario analysis results show
decreases of asset group condition over
time; decreases of asset groups' remaining
life; increases in agency costs in future
years to recover the desired level of service;
increases in backlogged costs over time;
and decreases in asset value over time.
Download NCHRP 859 at http://nap.
edu/24933.
IN THE OFFING
In the offing and in production, but not
yet published at press time, is NCHRP 858:

Quantifying the Effects of Preservation
Treatments on Pavement Performance.
Data exist for moving away from anecdotal evidence for demonstrating preservation effects, and this report will quantify
preservation effects using that data.
Many agencies collect and store data
required to assess effectiveness of preservation. Other sources of data-FHWA's
Long Term Pavement Performance (LTPP)
program, for example-can be used to supplement agency data. This report will apply
robust analytical tools to quantify the effects
of preservation on pavement performance.
"Pavement preservation provides a
means for maintaining and improving the
functional condition of an existing highway system and slowing deterioration,"
says a report on NCHRP 14-33, the project
culminating in the final report. "It can lead
to improved pavement performance, longer
service life, and reduced lifecycle costs.
"However, currently used measures for
quantifying pavement performance do not
appropriately account for the potential performance enhancement, life extension, and
cost savings resulting from applying preservation treatments at the right time," NCHRP
says. "For example, pavement smoothness
(or roughness), which is measured by the
International Roughness Index (IRI) and
widely used by highway agencies, is not
a good measure of the effect of many preservation treatments."
There is a need to identify or develop
pavement performance measures that consider the contributions of preservation to
performance, service life, and life-cycle
costs, NCHRP observes. Also, it adds, there
is a need to prepare a guide document
for AASHTO consideration and adoption
to facilitate the implementation of these
measures by state highway agencies.
The objectives of this research were to
identify and/or develop pavement performance measures that consider the contributions of preservation to performance,
service life, and lifecycle costs, and prepare a guide document to facilitate implementation of these measures by state
highway agencies.
In early 2018 research is complete. The
final report will be published as NCHRP
Report 858. We will advise readers when
it's published so they may take advantage
of the material.
Spring 2018 | PAVEMENT PRESERVATION JOURNAL

13



Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2018

President’s Message
New NCHRP Guidance Targets Pavement Preservation Performance
Florida Tackles Premature Failures of High Friction Surface Treatments
Oklahoma: High-Friction Surface Treatments Perform on Interstates
NCAT Track Conference Will Provide Look at Pavement Preservation Sections
FP2@TRB 2018
Bi-Partisan ‘problem Solvers Caucus’ Works to Move Infrastructure Reform
Research: Longitudinally Textured PCC Pavement Most Energy-Efficient Surface
Not Just Pavements: Micro Surfacing Right for New York’s Brooklyn Bridge
Profiles in Preservation: Crack Sealants
Index of Advertisers
Pavement Preservation Journal - Spring 2018 - Intro
Pavement Preservation Journal - Spring 2018 - cover1
Pavement Preservation Journal - Spring 2018 - cover2
Pavement Preservation Journal - Spring 2018 - 3
Pavement Preservation Journal - Spring 2018 - 4
Pavement Preservation Journal - Spring 2018 - 5
Pavement Preservation Journal - Spring 2018 - 6
Pavement Preservation Journal - Spring 2018 - 7
Pavement Preservation Journal - Spring 2018 - 8
Pavement Preservation Journal - Spring 2018 - President’s Message
Pavement Preservation Journal - Spring 2018 - 10
Pavement Preservation Journal - Spring 2018 - New NCHRP Guidance Targets Pavement Preservation Performance
Pavement Preservation Journal - Spring 2018 - 12
Pavement Preservation Journal - Spring 2018 - 13
Pavement Preservation Journal - Spring 2018 - 14
Pavement Preservation Journal - Spring 2018 - Florida Tackles Premature Failures of High Friction Surface Treatments
Pavement Preservation Journal - Spring 2018 - 16
Pavement Preservation Journal - Spring 2018 - 17
Pavement Preservation Journal - Spring 2018 - 18
Pavement Preservation Journal - Spring 2018 - 19
Pavement Preservation Journal - Spring 2018 - 20
Pavement Preservation Journal - Spring 2018 - Oklahoma: High-Friction Surface Treatments Perform on Interstates
Pavement Preservation Journal - Spring 2018 - 22
Pavement Preservation Journal - Spring 2018 - 23
Pavement Preservation Journal - Spring 2018 - 24
Pavement Preservation Journal - Spring 2018 - NCAT Track Conference Will Provide Look at Pavement Preservation Sections
Pavement Preservation Journal - Spring 2018 - FP2@TRB 2018
Pavement Preservation Journal - Spring 2018 - 27
Pavement Preservation Journal - Spring 2018 - 28
Pavement Preservation Journal - Spring 2018 - Bi-Partisan ‘problem Solvers Caucus’ Works to Move Infrastructure Reform
Pavement Preservation Journal - Spring 2018 - 30
Pavement Preservation Journal - Spring 2018 - Research: Longitudinally Textured PCC Pavement Most Energy-Efficient Surface
Pavement Preservation Journal - Spring 2018 - 32
Pavement Preservation Journal - Spring 2018 - 33
Pavement Preservation Journal - Spring 2018 - 34
Pavement Preservation Journal - Spring 2018 - 35
Pavement Preservation Journal - Spring 2018 - Not Just Pavements: Micro Surfacing Right for New York’s Brooklyn Bridge
Pavement Preservation Journal - Spring 2018 - 37
Pavement Preservation Journal - Spring 2018 - 38
Pavement Preservation Journal - Spring 2018 - Profiles in Preservation: Crack Sealants
Pavement Preservation Journal - Spring 2018 - 40
Pavement Preservation Journal - Spring 2018 - Index of Advertisers
Pavement Preservation Journal - Spring 2018 - 42
Pavement Preservation Journal - Spring 2018 - cover3
Pavement Preservation Journal - Spring 2018 - cover4
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