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IBI Group 18401 Von Karman Avenue—Suite 110 .Irvine CA 92812 USA tel 949 833 5588 fax 949 833 5511 February 12, 2018 Melanie McCann City of Santa Ana 20 Civic Center Plaza, Ross Annex M-20 Santa Ana, CA 92702 Exhibit A-1; 4th Amendment to Agreement # A-2011-198 AMENDMENT PROPOSAL NO.6 -CIRCULATION ELEMENT UPDATE This letter proposal details IBI Group's request for an amendment under our contract with the City of Santa Ana for the Circulation Element Update project. Work efforts associated with this amendment request involve new work requested by the City of Santa Ana. Specifically, the city has requested that IBI Group update the traffic impact study to include the removal of two proposed MPAH arterial reclassifications: MacArthur Boulevard from Harbor Boulevard to Main Street and McFadden Avenue from the West City Limit to Harbor Boulevard. The task listed below corresponds to the tasks assigned in the original scope of services for this contract. The proposed budget for completing this work is attached to this letter. Task 4 - Evaluation of Master Streets and Highway Plan Under Amendment No. 5, IBI Group completed an update to the draft traffic impact analysis for the updated Circulation Element. This analysis included assessment of a refined roadway network that excluded a proposed arterial roadway along the PE ROW and other refinements to the roadway network, as requested by the city. This analysis was completed during 2017, and the traffic study results were submitted to OCTA for review in October of 2017. Subsequent to this latest traffic analysis effort, the city has identified two proposed street reclassifications that should be removed from the Circulation Element update. The proposed reclassifications to be removed are: • MacArthur Boulevard from Harbor Boulevard to Main Street • McFadden Avenue from West City Limit to Harbor Boulevard The removal of these reclassifications from the future roadway network will require a new model run to be conducted by OCTA, using the updated proposed roadway network. IBI Group will coordinate with OCTA to obtain updated OCTAM model forecasts. Once updated forecasts are available, IBI Group will update the traffic analysis to include these new model forecasts. As part of this task, we will also prepare an updated version of the traffic study report for review by City staff and OCTA staff. IBI Group is a group of firma providing professional services 25J-5