Ghahari, S A

Labi, S

Qiao, Y

English

Purdue E-Pubs

How well are we doing relative to other States?  Interstate Highway Bridge Spending and Performance Comparisons across the States of the Union S.A. Ghahari, Y. Qiao, S. Labi Lyles School of Civil Engineering, Purdue University U.S. Department of Transportation and the General Accountability Office are engaged in oversight and accountability of state highway agencies. There is a need for regular systemwide monitoring of transportation infrastructure condition in response to highway expenditures.  INTRODUCTION STATISTICAL DATA DISCUSSION SUMMARY & FUTURE WORK OBJECTIVES Need to identify high performance and low performing agencies Poor performance of agency could be due to:  Work culture  Poor design/construction  Poor materials  Corruption  Etc.  Provide basis for recommendations for agency performance enhancement  VARIABLES Strength factors:  Total expenditure per ft2 of deck Stress factors:  Traffic (truck) loads  Climate severity (Freeze-thaw index in deg-days) The framework and results shows how oversight agencies can increase the overall accountability of individual highway agencies  Offer plausible explanations of the observed differences in the resulting overall bridge condition across the states. Using lagged panel model specifications Considering site-specific design variables  Identifying the stability of ranking Relaxing the assumptions Extend the work to superstructure and substructure Expenditure, area of the bridge, deck condition vs. freezing index and ADTT  (Average values for 2000-2012) Email: sghahari@purdue.edu; 201-887-9831  Key assumptions: (a) NBI data with the data spanning of 2000-2012  (b) 1 degree-day of FI and 1 truck have equivalent effects on deck damage  (c) Zero scale economies of expenditure effects on damage remediation. (Therefore, 1 $/ft2 in small state has same repair effect as 1$/ft2 in large state) Highest performers (Little spending per ft2, high deck condition, high truck traffic, severe climate) Colorado, Minnesota, Indiana, Ohio, Wisconsin, Wyoming, California  Lowest performers (High spending per ft2, low deck condition, low truck traffic, mild climate) New York, Idaho, Connecticut, Illinois, Massachusetts, Utah, Michigan , Pennsylvania RESULTS 3rd Quadrant (Highest Performers) 1st Quadrant (Lowest Performers) 4th Quadrant 2nd Quadrant U.S. average U.S. average 

How well are we doing relative to other States? Interstate Highway Bridge Spending and Performance Comparisons across the States of the Union

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=4161&amp;context=roadschool

How well are we doing relative to other States? Interstate Highway Bridge Spending and Performance Comparisons across the States of the Union

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