Common use of Traffic Signal Design Clause in Contracts

Traffic Signal Design. The Engineer will prepare construction documents including plans, specifications, and estimates (PS&E) for the installation of a four-approach traffic control signal at the intersection of ▇▇▇▇▇▇ ▇▇▇▇▇▇ Boulevard & Bar W Ranch Boulevard / Via De Sienna Boulevard. The Engineer will complete the following tasks as part of the design phase: 1. Assemble applicable design standards and specifications from the City of Leander, Williamson County, and TxDOT. 2. Obtain available existing record drawings and copies of all relevant design files from the County and/or City. 3. Obtain Topographic and Level D SUE information from the County. The Engineer shall be entitled to rely on the completeness and accuracy of the data provided. 4. Submit 811/”One Call” request for utility locates at the intersection. Perform field reconnaissance of the intersection to determine existing pavement widths, lane configurations, traffic control devices, speed limits, and utility locations. 5. Develop plans to construct a new traffic signal at the intersection. The signal plans will be prepared at a scale of 1” = 40’ on 11” x 17” plan sheets and will include the following components: a. Title Sheet (to include signature line for City of Leander) and Index of Sheets b. General Notes (based on standard notes for Williamson County Road Bond Program and modified as appropriate for this project). c. Existing Conditions sheet to show locations of existing traffic control devices, and both underground/overhead utilities at the intersection. d. Proposed Signal Layout sheet to show the locations of proposed signal poles, pedestrian poles, signal heads, signal cabinet, detection equipment, communication equipment, push buttons, electrical conduits, ground boxes, and electrical service. e. Signal Elevation sheet to show placement of signal heads on mast arms and required vertical clearance. f. Pedestrian Ramp Layout sheet to show the locations and types of proposed curb ramps, sidewalks, and railing. g. Conduit Chart and Electrical Wiring sheet to show the type and number of electrical wires in each conduit run and inside poles and mast arms. A new electrical service will be designed to support total electrical load due to the new traffic signal and safety lighting at the intersection. The electrical service will include two separate circuits for the traffic signal and illumination. ▇▇▇▇▇▇-▇▇▇▇ will coordinate with the City of Leander as required to establish the location of the new electrical service. h. Signing & Pavement Marking sheet to show modifications to existing signs & pavement markings that are required to change the intersection from unsignalized to signalized operation (ex; stop bars, crosswalks). 6. Review and select appropriate standard details and incorporate those details into the plans (including traffic control, traffic signal, sign, and pavement marking standard details). 7. Prepare a list of pay items, specifications, and construction quantities required to build the proposed traffic signal infrastructure. 8. Prepare an opinion of probable construction costs (OPCC) to accompany each plan submittal in Microsoft Excel format based on Williamson County provided template. ▇. ▇▇▇▇▇▇-▇▇▇▇ has no control over the cost of labor, materials, equipment, or over the construction Contractor’s methods of determining prices or over competitive bidding or market conditions. Opinions of probable costs provided herein are based on the information known to ▇▇▇▇▇▇-▇▇▇▇ at this time and represent only ▇▇▇▇▇▇- ▇▇▇▇’▇ judgement as a design professional familiar with the construction industry. ▇▇▇▇▇▇-▇▇▇▇ cannot and does not guarantee that proposals, bids, or actual construction costs will not vary from its opinions of probable costs. 9. Perform internal quality control reviews prior to each submittal. 10. Submit milestone deliverables for County and/or City review at the 60%, 90%, and 100% stages of completeness. All deliverables will be provided in electronic PDF format only. The Engineer will submit deliverables to City of Leander via HUB online portal but will not be responsible for payment of review, permitting, or similar fees. 11. Address one round of comments each for the 60% and 90% submittals and incorporate those comments into the plans as appropriate.