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service cabinet shall not exceed one (1) percent. Maximum voltage drop from service cabinet to the furthest point of the system shall not exceed two (2) percent. 12. All wiring for the traffic signal shall be IMSA cable for signals, 3M Opticom wiring for emergency vehicle preemption, OF for street light conductors, and XHHW for service wiring. 13. The traffic signal service shall be a 120 volt service with meter socket that includes a blank cover and jumper clips. Street lighting at the intersection shall be 120 volt and include a PEC on each fixture. 14. Interconnect cable shall be 22 Gauge PE39 Cable. 15. New installations and modifications require the installation of temporary "Caution New Intersection Control" signs. 16. Foundations shall be designed pursuant to the criteria on the City of Eugene Standards Drawings and the ODOT Traffic Structures Manual. The details for the mast arm foundations are shown on ODOT Standard Drawing TM653. The depth of the foundation must be designed using site specific recommendations from a Geotechnical Engineer and the most current AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals with all interim revisions. The drilled shaft (or other deep foundation) design must produce a foundation embedment depth equal to or exceeding the embedment depths resulting from the use of the Brom's method as stated in the commentary of Section 13.6.1.1 of the AASHTO Standard Specifications. The under -capacity factor to use is 0.7, the minimum overload factor to use is 2, and a 1.33 stress increase factor may be applied. This results in the working stress reactions, as shown on TM651, to be increased by a minimum safety factor equal to [(2/0.7) / 1.33] = 2.15. Using the Brom's method to design the depth of signal foundations with the overturning moment and shear will provide adequate resistance for applied torsional loads. Figures 2-1 through 2-3 in the ODOT Traffic Structures Design Manual provide foundation depths for the standard types of signal pole mast arms as a function of soil type (either cohesionless or cohesive) and soil strength. Figure 2-1 shows foundation depths calculated for a cohesionless soil without any groundwater. Figure 2-2 provides foundation depths for cohesionless soils that are completely under water Public Improvement Design Standards Manual, 2016 Page 2-43