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Publication Number: FHWA-HRT-12-035
Date: November 2012

 

Relating Ride Quality and Structural Adequacy for Pavement Rehabilitation/Design Decisions

APPENDIX C. TIME SEQUENCE IRI PLOTS

C.1 GROUP 1 SECTIONS

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 050119 in Arkansas. IRI is on the y-axis ranging from 0 to 120 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (March 15, 1994). IRI steadily increases from around 47 inches/mi 1 year after construction to 99 inches/mi 10 years after construction.

Figure 113. Graph. Time sequence IRI values, section 050119 (Arkansas).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 480114 in Texas. IRI is on the y-axis ranging from 0 to 70 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (June 1, 1997). IRI increases from around 45 inches/mi shortly after construction to 66 inches/mi 10 years after construction.

Figure 114. Graph. Time sequence IRI values, section 480114 (Texas).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 310113 in Nebraska. IRI is on the y-axis ranging from 0 to 140 inches/mi, and time is on the x-axis ranging from 0 to 5 years from the date of construction (August 1, 1995). IRI increases from around 95 inches/mi shortly after construction to 125 inches/mi about 5 years after construction.

Figure 115. Graph. Time sequence IRI values, section 310113 (Nebraska).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 010102 in Alabama. IRI is on the y-axis ranging from 0 to 250 inches/mi, and time is on the x-axis ranging from 0 to 14 years from the date of construction (March 1, 1993). IRI increases from around 55 inches/mi 1 year after construction to 205 inches/mi about 12 years after construction.

Figure 116. Graph. Time sequence IRI values, section 010102 (Alabama).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 390112 in Ohio. IRI is on the y-axis ranging from 0 to 
120 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (September 1, 1995). IRI increases from around 57 inches/mi 1 year after construction to around 100 inches/mi 10 years after construction.

Figure 117. Graph. Time sequence IRI values, section 390112 (Ohio).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 040123 in Arizona. IRI is on the y-axis ranging from 0 to 
120 inches/mi, and time is on the x-axis ranging from 0 to 14 years from the date of construction (August 1, 1993). IRI increases from around 50 inches/mi shortly after construction to around 115 inches/mi 13 years after construction.

Figure 118. Graph. Time sequence IRI values, section 040123 (Arizona).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 190108 in Iowa. IRI is on the y-axis ranging from 0 to 
160 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (May 18, 1993). IRI increases from around 50 inches/mi shortly after construction to around 140 inches/mi close to 12 years after construction.

Figure 119. Graph. Time sequence IRI values, section 190108 (Iowa).

C.2 GROUP 2 SECTIONS

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 320101 in Nevada. IRI is on the y-axis ranging from 50 to 
62 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (September 1, 1995). IRI remains fairly constant between 55 and 59 inches/mi throughout the 12 years, with a slight decrease over time.

Figure 120. Graph. Time sequence IRI values, section 320101 (Nevada).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 390106 in Ohio. IRI is on the y-axis ranging from 0 to 
140 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (September 1, 1995). IRI increases from around 70 inches/mi 1 year after construction to around 120 inches/mi 11 years after construction.

Figure 121. Graph. Time sequence IRI values, section 390106 (Ohio).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 310117 in Nebraska. IRI is on the y-axis ranging from 0 to 90 inches/mi, and time is on the x-axis ranging from 0 to 8 years from the date of construction (January 1, 1995). IRI remains around 63 to 67 inches/mi for most of the 8 years, but there is a high IRI value of 80 inches/mi around 1 year after construction and a low IRI value of 54 inches/mi around 7 years after construction.

Figure 122. Graph. Time sequence IRI values, section 310117 (Nebraska).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 310118 in Nebraska. IRI is on the y-axis ranging from 0 to 100 inches/mi, and time is on the x-axis ranging from 0 to 8 years from the date of construction (January 1, 1995). IRI remains around 73 to 81 inches/mi for the first 5 years after construction but drops to 63 and 55 inches/mi at 6 and 7 years after construction, respectively.

Figure 123. Graph. Time sequence IRI values, section 310118 (Nebraska).

C.3 GROUP 3 SECTIONS

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 190101 in Iowa. IRI is on the y-axis ranging from 0 to 
180 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (May 19, 1993). IRI increases from around 83 inches/mi shortly after construction to around 160 inches/mi 11 years after construction.

Figure 124. Graph. Time sequence IRI values, section 190101 (Iowa).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 190103 in Iowa. IRI is on the y-axis ranging from 0 to 
100 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (May 19, 1993). IRI increases from around 45 inches/mi shortly after construction to around 92 inches/mi 11 years after construction.

Figure 125. Graph. Time sequence IRI values, section 190103 (Iowa).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 050114 in Arkansas. IRI is on the y-axis ranging from 0 to 80 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (March 16, 1994). IRI increases from 50 inches/mi 1 year after construction to around 72 inches/mi 11 years after construction.

Figure 126. Graph. Time sequence IRI values, section 050114 (Arkansas).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 1 section 050116 in Arkansas. IRI is on the y-axis ranging from 50 to 70 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (March 16, 1994). IRI remains fairly constant between 59 and 67 inches/mi for the 11 years after construction.

Figure 127. Graph. Time sequence IRI values, section 050116 (Arkansas).

C.4 GROUP 4 SECTIONS

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 5 section 040502 in Arizona. IRI is on the y-axis ranging from 0 to 300 inches/mi, and time is on the x-axis ranging from 0 to 18 years from the date of construction (April 20, 1990). IRI increases from around 55 inches/mi shortly after construction to around 245 inches/mi 16 years after construction.

Figure 128. Graph. Time sequence IRI values, section 040502 (Arizona).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 5 section 240505 in Maryland. IRI is on the y-axis ranging from 0 to 250 inches/mi, and time is on the x-axis ranging from 0 to 16 years from the date of construction (March 31, 1992). IRI increases from around 60 inches/mi shortly after construction to around 205 inches/mi 15 years after construction.

Figure 129. Graph. Time sequence IRI values, section 240505 (Maryland).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 5 section 270509 in Minnesota. IRI is on the y-axis ranging from 0 to 140 inches/mi, and time is on the x-axis ranging from 0 to 16 years from the date of construction (September 15, 1990). IRI increases from around 55 inches/mi 1 year after construction to around 125 inches/mi 10 years after construction. Eleven years after construction, IRI decreases to 100 inches/mi and again steadily increases to around 118 inches/mi 15 years after construction.

Figure 130. Graph. Time sequence IRI values, section 270509 (Minnesota).

C.5 GROUP 5 SECTIONS

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 2 section 040213 in Arizona. IRI is on the y-axis ranging from 0 to 180 inches/mi, and time is on the x-axis ranging from 0 to 14 years from the date of construction (October 1, 1993). IRI increases from around 90 inches/mi shortly after construction to around 165 inches/mi 13 years after construction.

Figure 131. Graph. Time sequence IRI values, section 040213 (Arizona).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 2 section 050217 in Arkansas. IRI is on the y-axis ranging from 0 to 160 inches/mi, and time is on the x-axis ranging from 0 to 10 years from the date of construction (October 1, 1993). IRI increases from around 85 inches/mi 1 year after construction to around 135 inches/mi more than 9 years after construction.

Figure 132. Graph. Time sequence IRI values, section 050217 (Arkansas).

This graph shows the trend of International Roughness Index (IRI) with time for Long-Term Pavement Performance Specific Pavement Study 2 section 390205 in Ohio. IRI is on the y-axis ranging from 0 to 180 inches/mi, and time is on the x-axis ranging from 0 to 12 years from the date of construction (August 14, 1996). IRI remains steady at around 80–90 inches/mi shortly after construction until 8 years after construction and increases to around 165 inches/mi over the next 2 years (until 10 years after construction).

Figure 133. Graph. Time sequence IRI values, section 390205 (Ohio).