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i' Y \ 1''. ~ - ~',1`~~t - 3 ~ y ~ ~ . ~ 1. . /2t • , 'r ~ 7~ rid.. ~~casta~ I _ ~ - -:'~...C - - _.9.. ~ _~~S ~ -t t for some of our clients have come in 40°~b below the cost of similar projects a year ago so we wUl base our cost estimates on recent experience with projects that fait into an expected cost range for when the projects wilt be constructed. The City of Santa Ana will be providing cost estimates ~ for the projects on its list. To achieve consistency, we propose to first have our roadway design engineers consult with Santa Ana staff and recommend appropriate unit cost factors based on ~ both our recent experience and the City's data. We will meet with staff from both Cities to agree on consensus cost factors that will be consistently applied to the improvements in the study. ! The cost estimates will include factors for planning, engineering, and environmental studies, as well as an appropriate contingency factor. The unit cost for right-of--way (which will fikefy involve different unit costs for different land use types) will be determined in consultation with both R Cities' staff. Schematic design drawings of roadway segment and intersection projects (including ~ anticipated turn pocket lengths and other appropriate design components) will be developed on the most current readily available aerial mapping. This and cursory filed reviews will be used to assist in identifying critical constraints and estimating both construction quantities and right-of-way acquisition costs. 4 Subtask B.1: identify Improvements Needed for Existing Conditions f? ~ 1. tdentify improvements needed to mitigate existing congestion. (These will be excluded from the nexus analysis.) Calculate LOS with improvements. 9 Subtask B.2: identify Future Improvements 4 1. Identify additional improvements needed to mitigate 2019 congestion. Calculate LOS with (mprovements. 2. Identify additional improvements needed to mitigate 2035 congestion. Calculate LOS with ~ improvements. 3. Submit improvement fists to Cities for review/comment and concurrence. ~ Subtask B.3: Develop Cost Estimates 1. Prepare aplanning-?evet project improvement cost template. 2. Review Santa Ana cost estimates and unit cost assumptions, along with recent available ~ construction cost information, and recommend appropriate methods and unit cost factors to 1 apply in this study. 3. Meet with Santa Ana and Tustin staff to develop consensus on a consistent costing methodology and unit cost factors. 4. Prepare schematic design drawings of roadway and intersection widening Improvements on aerial photographs. Drawings will be prepared for improvements in the Tustin portion of the study area, and for improvements in the Sonia Ana portion identified in Subtask B.2 but not on the City's initial list of improvement projects (Santa Ana staff will provide the cost estimates for those). For budgeting purposes, we have assumed two miles of roadway widening/ construction, two railroad overcrossings, and tour intersection widening projects. 1 1 171770153.09 Klmley-Hom ~ and Associates, inc. 25C-21