4.0 SUMMARY OF ARTERIAL INTERSECTIONS CONGESTION ANALYSIS AND IMPROVEMENT CONCEPTS

Transcription

1 4.0 SUMMARY OF ARTERIAL INTERSECTIONS CONGESTION ANALYSIS AND IMPROVEMENT CONCEPTS 4.1 SUMMARY The Arterial Intersection Congestion Analysis Report, dated May 29, 2012, was approved by the SR-91/I-605/I-405 Technical Advisory Committee (TAC) meeting on May 29, That report summarized the results of the arterial intersection analysis for the SR-91/I-605/I-405 Congestion Hot Spots project, including intersection ranking methodology and corresponding analysis results and suggested arterial intersection improvements. A total of 97 study arterial highway intersections and 118 freeway ramp intersections (total of 215 study intersection locations) were included within the SR-91/I-605/I-405 study area for analysis. From that list of study intersections, 40 locations were designated for further analysis as described in the Arterial Intersection Congestion Analysis Report, including the development of concept improvements to improve existing and future operating deficiencies. The Top 40 intersections selected for initial improvement evaluation are listed in Table 16 and shown graphically in Figure 5. Note that the intersections of I-405 Northbound at Seal Beach Boulevard and I-405 Southbound at Seal Beach Boulevard have already been identified as part of the I-405 West County Connector Project, thus additional improvements were not identified at this time. The proposed improvements have been analyzed and are shown to result in improved LOS conditions. For clarity, the locations are shown with strikethrough on the table, and similarly marked in the graphics. Similarly, as the proposed intersection improvements were reviewed in the sub-tac meetings with city representatives in February and March 2012, another small group of intersections were removed from consideration for improvement. These locations were requested to be removed by the city, GCCOG and Metro representatives for various reasons, and included: I-605 NB Ramps and Valley View/Temple Ave. Carmenita Road and Artesia Boulevard Carmenita Road and Rosecrans Avenue Lakewood Boulevard and Carson Street Bellflower Boulevard and Carson Street This resulted in a total of 33 initial intersections that ultimately moved forward with the development of conceptual improvement plans (see Table 16). Additional intersections improvements will be identified in later phases of work. Page 51

2 TABLE 16: TOP 40 INTERSECTIONS ANALYZED Intersection Number Intersection Jurisdiction 83 Santa Fe Springs Rd and Whittier Blvd (Pickering Ave/Washington Blvd) Whittier 12 Lakewood Blvd and Telegraph Rd Downey/Pico Rivera 92 Painter Rd and Whittier Blvd Whittier 4 Lakewood Blvd and Del Amo Blvd Long Beach/Lakewood R66-R67 I-605 SB Ramps and Washington Boulevard Santa Fe Springs 16 Rosemead Blvd and Beverly Blvd Pico Rivera 25 Studebaker Rd and Rosecrans Ave Norwalk 91 Painter Rd and Mulberry Rd Whittier/LA County (South Whittier) R87 I-405 SB Ramps and Seal Beach Boulevard Seal Beach 42 Colima Rd and Whittier Blvd Whittier 15 Rosemead Blvd and Whittier Blvd Pico Rivera 80 Bloomfield Ave and Imperial Hwy Santa Fe Springs/Norwalk 46 Valley View Ave and Imperial Hwy LA County (South Whittier)/La Mirada 57 Los Alamitos Blvd and Katella Ave Los Alamitos 39 & 110 Orr and Day Rd and Florence Ave (I-5 NB Ramp) Santa Fe Springs 7 Lakewood Blvd and Alondra Blvd Bellflower/Paramount 1 Lakewood Blvd and Spring St Long Beach 9 Lakewood Blvd and Imperial Hwy Downey 71 Norwalk Blvd and Whittier Blvd Whittier/LA County (West Whittier-Los Nietos) 48 Bellflower Blvd and Spring St Long Beach 36 Pioneer Blvd and Imperial Hwy Norwalk 10 Lakewood Blvd and Firestone Blvd Downey R88 I-405 NB Ramps and Seal Beach Boulevard Seal Beach 13 Rosemead Blvd and Slauson Ave Pico Rivera 11 Lakewood Blvd and Florence Ave Downey 45 Valley View Ave and Rosecrans Ave La Mirada/Santa Fe Springs 14 Rosemead Blvd and Washington Blvd Pico Rivera R86 I-605 NB Ramps and Valley Boulevard and Temple Avenue LA County/Industry 70 Norwalk Blvd and Washington Blvd Santa Fe Springs 90 Carmenita Rd and Telegraph Rd Santa Fe Springs/LA County (South Whittier) R61 I-605 NB Ramps and Telegraph Road Santa Fe Springs 44 Valley View Ave and Alondra Blvd Santa Fe Springs/La Mirada R60 I-605 SB Ramps and Telegraph Road Santa Fe Springs 77 Bloomfield Ave and Artesia Blvd Cerritos 85 Carmenita Rd and Artesia Blvd Cerritos 24 Studebaker Rd and Alondra Blvd Norwalk/Cerritos 87 Carmenita Rd and Rosecrans Ave Norwalk/Santa Fe Springs 3 Lakewood Blvd and Carson St Long Beach/Lakewood 50 Bellflower Blvd and Carson St Lakewood/Long Beach 84 Carmenita Rd and South St La Palma/Cerritos Page 52

3 FIGURE 8: 40 TOTAL INTERSECTIONS SELECTED FOR IMPROVEMENT EVALUATION Page 53

4 The proposed arterial intersection improvements were reviewed with the staff of all affected jurisdictions during special sub-tac focus meetings and one on one meetings as required. Comments were received and reviewed and concept improvement drawings revised as appropriate. The final concept plans are presented in Appendix H. Table 18 displays the arterial intersection location, the jurisdiction it falls within, the 2035 No-Build level of service (before improvement), and the 2035 level of service for the Build condition on the freeways with the proposed improvements for each intersection. This LOS value is representative of the volume analysis for Concept B, as discussed in the approved Arterial Intersection Congestion Analysis Report. It is labeled as the Build condition to reflect the fact there would be no appreciable change in the intersection volumes for the subsequent Freeway Improvement Concept C, which will have a combination of freeway improvements from Concept A, B, and new or modified improvements for Concept C, or the existing No-Build condition. In summary, most of the locations were found to improve at least one level of service and in many cases the locations improve by multiple service levels. A summary of the results is as follows, and these are recommended as the initial intersections to be improved: AM Peak Hour Arterial Intersection Level of Service Summary No-Build AM Peak 11 LOS F, 9 LOS E, 12 LOS D or better 2035 Concept B with Improvements AM peak 1 LOS F, 3 LOS E, 28 LOS D or better PM Peak Hour Arterial Intersection Level of Service Summary No-Build PM Peak 21 LOS F, 9 LOS E, 2 LOS D or better 2035 Concept B with Improvements AM peak 4 LOS F, 7 LOS E, 21 LOS D or better These results indicate significant overall improvement with Concept B conditions combined with proposed intersection improvements. During the AM peak hour, 10 LOS F locations are improved with only one LOS F condition remaining, and during the PM peak hour, 17 LOS F conditions are improved with only 4 remaining. The number of LOS D or better locations improves from 12 in the AM peak hour to 28, and it improves from only 2 in the PM peak hour to 21. The Gateway Cities Council of Governments, in partnership with LA Metro, is proceeding with a Phase II Transportation Strategic Plan that will further examine all the arterial highways in Gateway Cities. The analysis completed for the Arterial Intersection Congestion Analysis Report will served as the foundation for identifying and evaluating additional intersections and/or arterial highway segments/highways for further improvements. Table 17 includes the preliminary estimated cost for each of the 33 locations for which improvement concepts were prepared. Appendix I provides the detailed back-up for the preliminary cost estimates for the individual intersection locations. The costs were estimated Page 54

5 utilizing current bid data for similar local street improvement projects in 2012 dollars and are not escalated to any particular year of future construction. For ease of reference the same template was utilized for each location. At the request of the affected cities (Pico Rivera, Santa Fe Springs, and Downey) the preliminary cost estimates include widening of the Washington Boulevard and Telegraph Road bridges over the San Gabriel River to their respective master plan width for these streets. This cost has been included within the I-605 SB Ramp/Washington Boulevard and I-605 SB Ramp/Telegraph Road arterial intersection locations. 4.2 COST ESTIMATES FOR ARTERIAL INTERSECTION IMPROVEMENT CONCEPTS Planning level cost estimates were prepared for each of the arterial intersection improvement concepts. Refer to Appendix J for detailed cost estimate data for arterial intersections. TABLE 17: COST ESTIMATES FOR ARTERIAL INTERSECTIONS Page 55

6 TABLE 18: ARTERIAL INTERSECTION CONGESTION ANALYSIS IMPROVEMENT DETAIL Page 56

7 TABLE 18 (CONT.): ARTERIAL INTERSECTION CONGESTION ANALYSIS IMPROVEMENT DETAIL Page 57

8 TABLE 18 (CONT.) ARTERIAL INTERSECTION CONGESTION ANALYSIS IMPROVEMENT DETAIL Page 58