Details:

Creators:
Darter, Michael I. ; Titus-Glover, Leslie ; Wolf, Dean J.
Darter, Michael I. ; Titus-Glover, Leslie ; Wolf, Dean J. Less -
Corporate Creators:
Applied Research Associates, Inc.
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Data Collection Data Processing Mechanistic Design Pavement Design Pavement Management Systems Rehabilitation (Maintenance) Traffic Data Traffic Volume Vehicle Classification Vehicle Weight
Publication/ Report Number:
FHWA-AZ-13-672
Resource Type:
Tech Report
Geographical Coverage:
Arizona
Corporate Publisher:
Arizona. Dept. of Transportation
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Design;NTL-PLANNING AND POLICY-PLANNING AND POLICY;
Abstract:
Accurate traffic data is one of the key data elements required for the cost-effective design of all rehabilitation and reconstruction of

pavement structures. This research study addresses the collection, preparation, and use of traffic data required for pavement design

by the Arizona Department of Transportation (ADOT), focusing on data required as inputs for the American Association of State

Highway and Transportation Officials (AASHTO) Mechanistic-Empirical Pavement Design Guide (MEPDG) design procedures.

ADOT’s current traffic data collection and preparation processes are not adequate to meet the needs of the MEPDG procedure, and

improvements are needed. These improvements include enhanced volume, classification, and weight data collection for vehicles,

processing data and performing quality assurance checks, and the preparation/analysis of the data for use in the MEPDG. Use of the

MEPDG in Arizona will require (1) an annual flow of updated key traffic data and (2) the ability to collect on-site (MEPDG Level

1) data in a timely manner for key projects.

An action plan (Chapter 8) calls for the establishment of an Arizona Traffic Segment Database that includes all state highways (or

the expansion of an existing traffic database). This database would include all traffic inputs required for the AASHTO MEPDG and

AASHTO 1993 design procedures, as well as ADOT pavement management activities. Traffic segments would be identified by

beginning and ending milepost numbers and global positioning system (GPS) coordinates along each highway.

The researchers propose, and have partly developed, a system for traffic data collection for the MEPDG in Arizona. Level 1 data

collection procedures are provided for selected traffic inputs. ADOT’s traffic data collection group will need to develop a process

for collecting Level 1 data in a timely manner for important projects requested from the pavement design group. This report also

discusses recommended Level 2 and Level 3 inputs, which were prepared based on the best historical data available. These data

represent a good initial set of inputs that can be used over the next few years. However, the inputs should be updated annually using

improved data collection methods beginning as soon as possible.


Format:
PDF
Funding:
SPR-PL1(175) 672
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:9d122d3bbb2fbe2b418764f217cb63acfdc5e11da9546b539b2d694a63cb85e4
Download URL:
https://rosap.ntl.bts.gov/view/dot/26476/dot_26476_DS1.pdf
File Type:

Supporting Files

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