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AcCOM Data and Sources Pavement Loadings Pavement Management Loading Study City of Santa Ana, California Street classifications, pavement types, and street areas were obtained from the Santa Ana Pavement Management Program report, June 2014 and PAVER Data spreadsheets, August 24, 2015. Secondary and collector arterials were combined for analysis due to their similarities in structure and traffic loadings. Typical street pavement sections are as shown in the full depth reconstruction lines of the Santa Ana Design Standards for Arterials and Locals. These were used to determine the asphaltic concrete pavement structural number (SN) and concrete pavement thickness for the ESAL calculations. Total traffic volumes for arterials were obtained from the Santa Ana Traffic Census for 2013- 2014. Traffic volumes for representative street segments within each street class were identified to calculate an average daily traffic volume (ADT) for each street class. ADT traffic volumes for local streets were estimated based on generalized land use trip generation, experience, and engineering judgment. Total truck volumes and classes on major and primary arterials were obtained from CalTrans June -July, 2015 truck classification counts supplied by the City. Truck counts were not available for other arterials and local streets. For those streets the total truck volumes and classes for those streets were estimated using the 2015 counts as starting points and applying engineering judgment. Waste collection truck types, axle weights, and volumes for each street class were provided by Waste Management of Orange County. Orange County Transit Authority (OCTA) Transit bus volumes were obtained from the route schedules for the Orange County Transit Authority. Representative routes were reviewed for each street class for weekdays, Saturdays, and Sundays, and average bus volumes were calculated. OCTA bus weights were obtained from technical information provided by the agency. Santa Ana Unified School District ( SAUSD) school bus volumes and trip locations were estimated by engineering judgment. SAUSD bus weights were based on representative weights for typical school buses. Street sweeping locations, sweeping frequency, and sweeper weights were provided by Santa Ana Public Works Maintenance. Axle load equivalency factors for calculating ESALs from axle weights were obtained from the American Association of State Highway and Transportation Officials (AASHTO) Guide for Design of Pavement Structures, 1993. (1993 Pavement Design Guide) ESAL constants for calculating ESALs based on vehicle type were obtained from the CalTrans Highway Design Manual, Table 613.3A. The 10 -year ESAL constant was adjusted down to a one week ESAL constant. AECOM Project No. 60477125 om � ', June 21, 2016 Page 2 of 11