Asphalt Concrete Smoothness Incentive Results by Highway Type and Design Strategy

Asphalt Concrete Smoothness Incentive Results by Highway Type and Design Strategy
Author: Y. Li
Publisher:
Total Pages: 16
Release: 2003
Genre: Cost and benefit
ISBN:

The Arizona Department of Transportation (ADOT) implemented an incentive/disincentive asphalt concrete (AC) smoothness specification in 1990. Since then hundreds of projects have been tested for smoothness. These projects have included a wide variety of layer combinations of one or more of the following: overlay, remove, replace, and finishing course. The number of projects and variation in design allows comparisons of the smoothness results for different design strategies as well as trends in smoothness results over time. In addition to the tests on the final surface, many projects were also tested on intermediate lift surfaces.

Constructing Smooth Hot Mix Asphalt (HMA) Pavements

Constructing Smooth Hot Mix Asphalt (HMA) Pavements
Author: Mary Stroup-Gardiner
Publisher: ASTM International
Total Pages: 156
Release: 2003
Genre: Pavements, Asphalt
ISBN: 0803134606

This publication contains papers presented at a December 2001 symposium, focusing on hot mix asphalt (HMA) smoothness measurements, specifications, and equipment. Five papers provide insight into the development and implementation of roughness specifications for pavements, and two papers offer natio

Impact of a Smoothness Incentive/disincentive on Hot-mix Asphalt Maintenance-resurfacing Costs

Impact of a Smoothness Incentive/disincentive on Hot-mix Asphalt Maintenance-resurfacing Costs
Author: Kevin K. McGhee
Publisher:
Total Pages: 40
Release: 2006
Genre: Pavements, Asphalt
ISBN:

Smoothness, the absence of bumps and dips in the riding surface of a pavement, improves the quality of the ride and is believed to prolong the life of the pavement. This research addressed the impact of potential pay adjustments for smoothness on maintenance contract prices for hot-mix asphalt. In addition to the construction costs associated with potential incentives/disincentives for smoothness, the research examined the financial value of the resulting product (presumably smoother pavements). The analysis included maintenance cost savings for the owner/agency, as well as any reduction in delay and operating costs for the motoring public. A detailed statistical analysis of 5 years of Virginia's plant mix resurfacing schedules found no statistically definitive impact on bid price as a result of the Virginia Department of Transportation's (VDOT) special provision for rideability for asphalt pavements. A similar analysis on a more focused data set, however, did document a lifetime reduction in the International Roughness Index (IRI) of almost 9 in/mi. This reduction in roughness (increase in smoothness) implies an increase in pavement service life, which translates into reduced annual maintenance costs. Although the analysis supports as much as 7 years in additional functional life, an example calculation demonstrates that just a 2-year life extension will supply approximately $1,295 (about 6% of material costs) in owner/agency savings for every lane-mile of highway that is resurfaced under the special provision for rideability. If VDOT continues to employ the special provision with the frequency it has averaged over the past 4 years (1,033 lane-miles per year), using the special provision will save on the order of $1.3 million per year. The lifetime decrease in roughness can lead to even more dramatic user cost savings. One real example provided in the report demonstrates a fuel cost savings (for trucks alone) of $160,000 over a 10-year period for each lane mile of highway that is resurfaced under the special provision for rideability.

Constructing Smooth Hot Mix Asphalt (HMA) Pavements

Constructing Smooth Hot Mix Asphalt (HMA) Pavements
Author: Mary Stroup-Gardiner
Publisher: Astm International
Total Pages: 153
Release: 2003
Genre: Pavements, Aspha
ISBN: 9780803134614

"Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading. The test is intended to simulate the stress conditions that occur in the base and subgrade of a pavement system. Resilient modulus has been adopted by the U.S. federal highway administration as the primary performance parameter for pavement design. We thank those who prepared these papers, the reviewers who provided anonymous peer reviews, and those who participated in the symposium. We hope this STP encourages more work to improve the testing standard and the value of the Resilient Modulus test."

AASHTO Guide for Design of Pavement Structures, 1993

AASHTO Guide for Design of Pavement Structures, 1993
Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
Total Pages: 622
Release: 1993
Genre: Pavements
ISBN: 1560510552

Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.

Guide for Pavement Friction

Guide for Pavement Friction
Author:
Publisher: AASHTO
Total Pages: 87
Release: 2008
Genre: Pavements
ISBN: 1560514280

This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.