AASHTO Guidelines for Traffic Data Programs - Table of Contents
AASHTO Guidelines for Traffic Data Programs - Table of Contents
AASHTO Guidelines for Traffic Data Programs - Table of Contents
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<strong>Table</strong> <strong>of</strong> <strong>Contents</strong><br />
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1<br />
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1<br />
1.2 Principles, Th emes, and Emerging Issues <strong>for</strong> <strong>Guidelines</strong> . . . . . . . . . . . . . . . . . . . . . . .1-2<br />
1.3 Summary <strong>of</strong> Traffi c <strong>Data</strong> <strong>Programs</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3<br />
1.4 Structure <strong>of</strong> the Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8<br />
Chapter 2 <strong>Traffic</strong> <strong>Data</strong> Collection Needs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1<br />
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1<br />
2.2 Traffi c Count Types and Needs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2<br />
2.3 Estimating Traffi c <strong>Data</strong> Collection Needs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11<br />
2.4 Reducing Traffi c <strong>Data</strong> Collection Needs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24<br />
2.5 Estimating Staff and Resource Requirements <strong>for</strong> Traffi c <strong>Data</strong> Collection . . . . . . .2-24<br />
2.6 Conclusion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-32<br />
2.7 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-33<br />
Chapter 3 <strong>Traffic</strong> Monitoring Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1<br />
3.1 Introduction to <strong>Data</strong> Collection Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1<br />
3.2 Equipment Technologies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3<br />
3.3 <strong>Data</strong> Collection Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23<br />
3.4 Equipment Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-45<br />
3.5 Equipment Installation and Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-49<br />
3.6 Traffi c Counting on Congested Roadways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59<br />
3.7 Th e <strong>Data</strong> Implications <strong>of</strong> the Growing Emphasis on Roadway Operations . . . . . .3-61<br />
3.8 Conclusion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62<br />
3.9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62<br />
Chapter 4 Quality Assurance <strong>for</strong> <strong>Traffic</strong> <strong>Data</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1<br />
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1<br />
4.2 Integrating Quality Assurance into Traffi c Monitoring <strong>Programs</strong> . . . . . . . . . . . . . . .4-3<br />
4.3 What Is <strong>Data</strong> Quality? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10<br />
4.4 Assessing <strong>Data</strong> Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12<br />
GUIDELINES FOR TRAFFIC DATA PROGRAMS ix<br />
© 2009 by the American Association <strong>of</strong> State Highway and Transportation Officials.<br />
All rights reserved. Duplication is a violation <strong>of</strong> applicable law.