Laserfiche WebLink
REQUEST FOR PROPOSAL <br />GAD AND PS&E PREPARATION FOR THE <br />ALTON AVENUE OVERCROSSING AT STATE ROUTE 55 PROJECT <br />INTRODUCTION <br />The City of Santa Ana Public Works Agency desires to enter into an agreement with <br />a qualified consulting engineering firm for the preparation of Geometric Approval <br />Drawings (GAD), Plans and Specifications and Estimate (PS&E) for the Alton <br />Avenue overcrossing at the State Route 55 (SR-55). The design will be based on <br />Phase I of the approved Alton Avenue Overcrossing Project Report (PR) <br />configuration. Major elements of the project are: <br />A 90-foot wide overcrossing structure across SR-55 at Alton Avenue <br />connecting the Cities of Santa Ana and Irvine. This structure design shall <br />accommodate future Northbound and Southbound HOV direct access on- <br />ramp and off-ramp from Alton Avenue to the median HOV lanes of SR-55. <br />Travel paths and curb cuts shall be provided for wheelchair access according <br />to Americans with Disabilities Act (ADA) requirements. <br />Alton Avenue widening to the north between Maple Street and Halladay <br />Street to meet City of Santa Ana secondary arterial standards. <br />The limits of the project are shown in Exhibit A. The proposed improvements are <br />included in Exhibit B. The City of Santa Ana is the lead agency for this project and is <br />securing a cooperative agreement with Caltrans District 12 and the City of Irvine for <br />quality assurance. This project is funded through the City of Santa Ana, City of <br />Irvine, and OCTA. <br />11. PROJECT BACKGROUND <br />SR-55 between State Route 91 in Anaheim and 19th Street in Costa Mesa is a north- <br />south freeway transportation facility that acts as the city boundary between the City <br />of Santa Ana to the west and the City of Irvine to the east with interchanges at <br />MacArthur Boulevard and Dyer Road providing the interconnection between the two <br />cities. Due to the growth trends in both of these cities, the need for additional <br />circulation improvements was developed to ease the current traffic congestion. In <br />2002, Parsons Brinckerhoff Quade & Douglas (PB) prepared a traffic study <br />indicating that 13 of 16 local streets intersections within the project vicinity would <br />operate at an unacceptable Levels of Service (LOS) E or F during the AM peak <br />period, PM peak period, or both in 2025. Alton Avenue, currently not continuous <br />between the two cities having ends at Standard Ave in the City of Santa Ana and <br />Daimler Street in the City of Irvine, is identified as an optimal location to serve as <br />4 <br />25D-30 <br />