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Item 22 - Approve Adjustments & CIP Amendment, & Agreements with Mark Thomas, So Cal Regional Rail Authority (SCRRA), the U.S. Department of Transportation, & Caltrans for the Santa Ana Boulevard Grade Separation Project (No. 26-6718)
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Item 22 - Approve Adjustments & CIP Amendment, & Agreements with Mark Thomas, So Cal Regional Rail Authority (SCRRA), the U.S. Department of Transportation, & Caltrans for the Santa Ana Boulevard Grade Separation Project (No. 26-6718)
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4/30/2026 1:39:30 PM
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Public Works
Item #
22
Date
5/5/2026
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EXHIBIT 2 <br /> A=COM <br /> However, this location would operate at LOS F without the project; as such, the additional <br /> delay (less than the 1% threshold of significance) with the project would not constitute a <br /> significant impact. <br /> As previously discussed, this location does not meet the signal warrant criteria under <br /> Future Year (2035) conditions. Since the project would not add any traffic to the minor <br /> street approach (Fuller Street), a traffic signal would still not be warranted under Future <br /> Year (2035) plus Project conditions. <br /> At all other locations, the project would result in minimal changes to the ICU values (none <br /> greater than the 0.010 ICU threshold) or the average delays (less than 1%) per vehicle. <br /> Overall, the project would not result in any significant traffic impacts under Future Year <br /> (2035) plus Project conditions. <br /> Access to the new SARTC and the Fuller-Fruit/Santa Ana Boulevard intersection would <br /> not be affected by the addition of the project to Future Year (2035) conditions. <br /> 10.0 CONSTRUCTION ANALYSIS <br /> This section analyzes the potential impacts during construction of the proposed project. <br /> Construction of the proposed project could temporarily reduce the through capacity of <br /> Santa Ana Boulevard from a six-lane cross-section to a four-lane cross-section (reduction <br /> of two lanes of capacity, one lane in each direction). To determine the effect of this <br /> temporary reduction in capacity, a roadway segment analysis was conducted for Santa <br /> Ana Boulevard. <br /> 10.1 Santa Ana Boulevard Capacity Analysis <br /> A daily roadway capacity level of service analysis was conducted utilizing average daily <br /> traffic (ADT) during Opening Year (2016) conditions. For purposes of this analysis, the <br /> segment along Santa Ana Boulevard (from Santiago Street to west of the 1-5 freeway) was <br /> selected to identify potential impacts due to a reduction in capacity during construction. <br /> The first phase of construction involves shifting Santa Ana Boulevard south of its current <br /> alignment between Santiago Street and Fuller Street-Fruit Street. During this phase, four <br /> travel lanes (two in each direction) would be provided, thereby reducing the existing <br /> capacity by two lanes (currently a six-lane cross-section), for a duration of approximately <br /> 12 months. <br /> The second and final phase of construction would require complete closure of the <br /> eastbound direction of Santa Ana Boulevard. Eastbound traffic would be detoured south <br /> of the existing Santa Ana Boulevard alignment and connect to Fruit Street via a temporary <br /> two-lane roadway between Santiago Street and Fruit Street. Two westbound travel lanes <br /> will also be maintained. This second phase would occur over a short three-month span. <br /> Traffic/Circulation Study—Final May 18,2012 <br />
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