Asphalt Pavement Magazine - September/October 2017 - 40

PerRoad Version 4.3:
Perpetual Pavement
Design Software

Redesigned and updated to accommodate recent research findings
By David Timm, Ph.D., P.E.; Nam Tran, Ph.D., P.E.; and Carolina Rodezno, Ph.D.

Editor's Note: The following
article is an excerpt from the research
synopsis, "Redesign & Updates of the
Perpetual Pavement Design Software:
PerRoad Version 4.3," published
by the National Center for Asphalt
Technology as part of the NAPA/
SAPA-sponsored research project
Optimizing Flexible Pavement Design
and Material Selection.

Background

Figure 1: Strain Distribution Design Criteria

40 * View past issues online at www.naylornetwork.com/nap-nxt

Perpetual or long-life asphalt
pavements are designed to perform
longer than 50 years, requiring
only periodic mill and inlay of the
top layer to maintain an excellent
riding surface. Many Perpetual
Pavements have been built over
the years, 118 of which have been
recognized through the Asphalt
Pavement Alliance Perpetual
Pavement Awards program since
2001, clearly demonstrating longlife pavements as a viable flexible
pavement structure.
Perpetual Pavement structural
design relies on controlling the
bending strain at the bottom of the
asphalt concrete (AC) to prevent
bottom-up fatigue cracking and


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Table of Contents for the Digital Edition of Asphalt Pavement Magazine - September/October 2017

Chairman’s Commentary
Industry News
Back to Basics: Designed to Perform
NAPA President Mike Acott Talks About Thinlays
Asphalt Pavement Alliance 2016 Perpetual Pavement Awards
PerRoad Version 4.3: Perpetual Pavement Design Software
Tools for the Trade
Industry Calendar
Index of Advertisers/Advertisers.com
Asphalt Pavement Magazine - September/October 2017 - Intro
Asphalt Pavement Magazine - September/October 2017 - cover1
Asphalt Pavement Magazine - September/October 2017 - cover2
Asphalt Pavement Magazine - September/October 2017 - 3
Asphalt Pavement Magazine - September/October 2017 - 4
Asphalt Pavement Magazine - September/October 2017 - 5
Asphalt Pavement Magazine - September/October 2017 - 6
Asphalt Pavement Magazine - September/October 2017 - 7
Asphalt Pavement Magazine - September/October 2017 - 8
Asphalt Pavement Magazine - September/October 2017 - Chairman’s Commentary
Asphalt Pavement Magazine - September/October 2017 - 10
Asphalt Pavement Magazine - September/October 2017 - Industry News
Asphalt Pavement Magazine - September/October 2017 - 12
Asphalt Pavement Magazine - September/October 2017 - 13
Asphalt Pavement Magazine - September/October 2017 - 14
Asphalt Pavement Magazine - September/October 2017 - 15
Asphalt Pavement Magazine - September/October 2017 - 16
Asphalt Pavement Magazine - September/October 2017 - 17
Asphalt Pavement Magazine - September/October 2017 - 18
Asphalt Pavement Magazine - September/October 2017 - Back to Basics: Designed to Perform
Asphalt Pavement Magazine - September/October 2017 - 20
Asphalt Pavement Magazine - September/October 2017 - 21
Asphalt Pavement Magazine - September/October 2017 - NAPA President Mike Acott Talks About Thinlays
Asphalt Pavement Magazine - September/October 2017 - 23
Asphalt Pavement Magazine - September/October 2017 - 24
Asphalt Pavement Magazine - September/October 2017 - 25
Asphalt Pavement Magazine - September/October 2017 - 26
Asphalt Pavement Magazine - September/October 2017 - 27
Asphalt Pavement Magazine - September/October 2017 - 28
Asphalt Pavement Magazine - September/October 2017 - 29
Asphalt Pavement Magazine - September/October 2017 - 30
Asphalt Pavement Magazine - September/October 2017 - 31
Asphalt Pavement Magazine - September/October 2017 - Asphalt Pavement Alliance 2016 Perpetual Pavement Awards
Asphalt Pavement Magazine - September/October 2017 - 33
Asphalt Pavement Magazine - September/October 2017 - 34
Asphalt Pavement Magazine - September/October 2017 - 35
Asphalt Pavement Magazine - September/October 2017 - 36
Asphalt Pavement Magazine - September/October 2017 - 37
Asphalt Pavement Magazine - September/October 2017 - 38
Asphalt Pavement Magazine - September/October 2017 - 39
Asphalt Pavement Magazine - September/October 2017 - PerRoad Version 4.3: Perpetual Pavement Design Software
Asphalt Pavement Magazine - September/October 2017 - 41
Asphalt Pavement Magazine - September/October 2017 - 42
Asphalt Pavement Magazine - September/October 2017 - 43
Asphalt Pavement Magazine - September/October 2017 - 44
Asphalt Pavement Magazine - September/October 2017 - Tools for the Trade
Asphalt Pavement Magazine - September/October 2017 - 46
Asphalt Pavement Magazine - September/October 2017 - 47
Asphalt Pavement Magazine - September/October 2017 - 48
Asphalt Pavement Magazine - September/October 2017 - 49
Asphalt Pavement Magazine - September/October 2017 - 50
Asphalt Pavement Magazine - September/October 2017 - 51
Asphalt Pavement Magazine - September/October 2017 - 52
Asphalt Pavement Magazine - September/October 2017 - Industry Calendar
Asphalt Pavement Magazine - September/October 2017 - 54
Asphalt Pavement Magazine - September/October 2017 - Index of Advertisers/Advertisers.com
Asphalt Pavement Magazine - September/October 2017 - 56
Asphalt Pavement Magazine - September/October 2017 - 57
Asphalt Pavement Magazine - September/October 2017 - 58
Asphalt Pavement Magazine - September/October 2017 - cover3
Asphalt Pavement Magazine - September/October 2017 - cover4
Asphalt Pavement Magazine - September/October 2017 - outsert1
Asphalt Pavement Magazine - September/October 2017 - outsert2
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