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HomeMy WebLinkAboutOB 1 MEDIAN OPENING 12-02-91OLD BUSINESS NO. 1 12-2-91 A G E NN"' D A inter -Com ' DATE: NOVEMBER 25, 1991 TO: WILLIAM A. HUSTON, CITY MANAGER FROM: PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION SUBJECT: FEASIBILITY STUDY TO PROVIDE - A MEDIAN OPENING ON TUSTIN RANCH ROAD AT PALERMO RECOMMENDATION The pleasure of the City Council. BACKGROUND At their meeting of November 18, 1991, the City Council directed staff to submit a report for the council meeting of December 2, 1991 which investigates the possible construction of a left turn pocket within the existing raised median on Tustin Ranch Road at Palermo for access into the Almeria Development. A report investigating such a median opening had previously been prepared by City staff at the request of the City Council. That report had been presented to the City Council at their meeting of December 17, 1990 and was received and filed by a unanimous vote of 4 to 0. A copy of that report has been attached for reference. DISCUSSION The report previously prepared for this matter would still be relevant including the typical construction costs that could be expected with such an endeavor. Currently, no City funds have been appropriated in the 1991-92 budget for this work. If the City Council were to approve of such a project, then detailed plans and specifications would have to be prepared, and the project put out to a formal public bidding process for actual construction. It should be noted that Assessment District (A.D.) funds are being utilized on the Tustin Ranch Road median at Auto Center.Drive to accommodate the extension of Tustin Ranch Road to the south.. This use is considered part of the initial construction for the overall East Tustin A.D. planned infrastructure improvements. 1-17 Robert S. Ledendecker Director of Public Works/ City Engineer RSL:kIb:LFTTURN Attachment / -.") Dana R. Kasdan� Engineering Servic s Manager - GATE: TO: FROM: SUBJECT: 1 17_q o DECEMBER 11, 1990 WILLIAM A. HUSTON, CITY MANAGER Inter - Com PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION FEASIBILITY STUDY TO PROVIDE A MEDIAN OPENING ON TUSTIN RANCH ROAD AT PALERMO RECOMMENDATION: The pleasure of the City Council. BACKGROUND The City Council at their November 19, 1990, requested staff to investigate the feasibility of cutting the raised median on Tustin Ranch Road at Palermo to provide an opening for left turn access into the Peters Tract (South of Irvine Boulevard). A traffic impact study was conducted to determine the traffic and circulation impacts associated with the Peters Tract. This tract consists of 118 single family detached homes and is located on Tustin Ranch Road between Irvine Boulevard and Parkcenter Lane. Two access locations are provided for the tract, one at Palermo from Tustin Ranch Road and the other one off Parkcenter Lane via Monterey Street/Triburon Way. . Irvine Boulevard is a six -lane Major Arterial roadway located to the north of the Peters Tract. This arterial currently services traffic volumes on the order of 34,000 per day. Tustin Ranch Road also has six lanes of traffic and is classified as a Major Arterial roadway. Presently, this roadway services daily traffic volumes of 3,000 vehicles per day. Parkcenter Lane is a local collector with current daily traffic volumes of 11200 vehicles per day. FINDINGS The traffic generation potential of the Peters Tract is expressed in vehicle trip ends, where a trip end is a one-way vehicular movement either entering or departing the tract. The traffic generation rates shown herein are based on data published by the Institute of Transportation Engineers and assumes full occupancy o the tract. For the purpose of assessing the overall impact of the tract, trip generation rates and distribution assignments have been used for a "worst case" analysis. Table 1 presents the traffic generation relative to the existing Peters Tract. Page 2 TABLE 1 TRIP GENERATION PROJECT TRAFFIC DAILY AM PEAK HOUR PM PEAK HOUR 2 -WAY INBOUND OUTBOUND INBOUND OUTBOUND Units RATE/TRIPS RATE/TRIPS RATE/TRIPS RATE/TRIPS RATES/TRIPS Single 10.062/1,188 .204/24 .55/65 .633/75 .372/44 Family Detached Homes 118 Units * DATA SOURCE is ITE- Trip Generation, 4th Edition, 1987. As shown in the table this project area generates a total of 1,188 vehicles trips per day, evenly divided between inbound and outbound movements. During the AM peak hour, a total of 89 trips would be generated (24 inbound- 65 outbound) while the PM peak hour would generate an estimated total of 119 trips (75 inbound- 44 outbound) . The distribution and assignment of project traffic was based on a review of current peak hour travel patterns. Exhibit 1 shows the traffic distribution for the Critical AM, and PM peak hours as well as 24 hour daily volumes. The total trip generation was analyzed for each access entry point as'a worst case scenario. Exhibit 1 also shows that during the critical PM peak hour, 41 left turns would be generated if a left turn pocket was to be constructed on Tustin Ranch Road. The construction of this left turn pocket is physically possible with the construction cost estimated at $45,100 as shown in Exhibit 2.' A detail sketch of the left turn pocket design is shown in Exhibit 3. This design would restrict left turns out of Palermo. However, it should be pointed out that this left turn would be uncontrolled which in turn would require a yield to on -coming traffic. The current volume of traffic on Tustin Ranch Road is approximately 3,000 vehicles per day. Future traffic projections shown that this street will increase to 26,000 vehicles in the year 1995 and to 32,000 vehicles by the year 2010. Future traffic volumes for Irvine Boulevard will exceed 40,000 per day by the year 2010. As soon as the Tustin Ranch Road interchange with the Santa Ana Freeway is completed, the right turn demand off of Irvine Boulevard will increase dramatically. Page 3 This increased demand will utilized the right turn over lapping green arrow currently installed at the intersection of Irvine and Tustin Ranch Road. The utilization of this right turn arrow in combination with future traffic volume demands on Tustin Ranch Road will create insufficient gaps to allow left turns into Palermo without excessive delays. Traffic wishing to enter the Peters Tract can currently enter via a controlled traffic signal at Parkcenter Lane. This entry adequately provides access to the project area without the installation of an additional left turn pocket on Tustin Ranch Road. It is the Staff's feeling that money required to install the additional left turn pocket should be used on other priority projects. There is no funding available in the 1990-91 Budget for this project, and it has been determined that Assessment District No. 85-1 funding could not be utilized on this project. Bob Ledendecker Director of Public Works/City Engineer BL: SD: cr dA.,O- Orr Sandra Doubleda Y Engineering Consultant 010 IRVINE O p IO O SFr CIL & 000� jQP BOULEVARDx — - V C ~ ;—�— o � m w I ( cc N t W U Q W O > O m _ o > VENTIA cd le►- d 0 o CD o ` > rti a W _ m Q 0 ` = O W � F- 5 N J~ Z CARRERA ` Z L 40 FZ-- D O Z1 D a:F- �e �.` �� �� '►�w V ZQ Cf)IJ.. �I/co l,00 69A H U PALERMO MARSELINA � �N 7 r 0 5°' e 60 SFr CIL & 000� jQP EXHIBIT 2 CONSTRUCTION COST ESTIMATE Tustin Ranch Road @ Palermo Left Turn In Only Median Opening 12/10/90, by Jeff Chen Description M Unit Quantity Price Cost TOTAL Total Construction Estimate Remove existing type A curb & gutter. is is $4,000 1. Engineering Design (20%) Landscape and modify existing systems. Construction Survey 31000 Inspection 2. Construct type A curb & gutter 300 if $20/If $62000 (12" gutter, 8"cf). 3. Construct 0.40' A.C. 70 to $8,0/tn $52600 4. Construct 1.65' Class II base 255 to $20/tn $5,100 5. Construct 4" thick stamped concrete 525 sf $6/sf $3,150 paving. 6. Construct mow strip & 6" thick stamped 130 sf $8/sf $17040 concrete drive apron and paving. 7. Construct new striping and install new is is $17500 signs and pavement markers. 8. Mobilization Is Is $17500 9. Traffic control & lane closure Is Is $1,500 TOTAL Total Construction Estimate $30,000 Contingency (10%) 3,000 Subtotal $331000 Engineering Design (20%) 69600 Construction Survey 31000 Inspection 2,500 TOTAL $457100 0 U o . N 17— v aC z w s r eL v fl � v 0 x 0 +1 -HI (9 O z z Lu � a w 0 z Q Q w z 0 • O � z Up Z ~ w J Z o � w V) U) O 0- 0 O ac CL Go X W U N 17— v r x 0 +1 -HI (9 O z z Lu � a w 0 z Q Q w z 0 • O � z Up Z ~ w J Z o � w V) U) O 0- 0 O ac CL Go X W