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appropriate roadway to control should be based on engineering judgment. In most cases, the <br />roadway carrying the lowest volume of traffic should be controlled. <br />08 A YIELD or STOP sign should not be installed on the higher volume roadway unless justified by <br />an engineering study. <br />Support: <br />09 The following are considerations that might influence the decision regarding the appropriate <br />roadway upon which to install a YIELD or STOP sign where two roadways with relatively equal <br />volumes and/or characteristics intersect: <br />A. Controlling the direction that conflicts the most with established pedestrian crossing <br />activity or school walking routes; <br />B. Controlling the direction that has obscured vision, dips, or bumps that already require <br />drivers to use lower operating speeds; and <br />C. Controlling the direction that has the best sight distance from a controlled position to <br />observe conflicting traffic. <br />Standard: <br />10 Because the potential for conflicting commands could create driver confusion, YIELD <br />or STOP signs shall not be used in conjunction with any traffic control signal operation, <br />except in the following cases: <br />A. If the signal indication for an approach is a flashing red at all times; <br />B. If a minor street or driveway is located within or adjacent to the area controlled <br />by the traffic control signal, but does not require separate traffic signal control <br />because an extremely low potential for conflict exists; or <br />C. If a channelized turn lane is separated from the adjacent travel lanes by an <br />island and the channelized turn lane is not controlled by a traffic control signal. <br />11 Except as provided in Section 2B.09, STOP signs and YIELD signs shall not be <br />installed on different approaches to the same unsignalized intersection if those <br />approaches conflict with or oppose each other. <br />12 Portable or part-time STOP or YIELD signs shall not be used except for emergency <br />and temporary traffic control zone purposes. <br />13 A portable or part-time (folding) STOP sign that is manually placed into view and <br />manually removed from view shall not be used during a power outage to control a <br />signalized approach unless the maintaining agency establishes that the signal <br />indication that will first be displayed to that approach upon restoration of power is a <br />flashing red signal indication and that the portable STOP sign will be manually <br />removed from view prior to stop-and-go operation of the traffic control signal. <br />Option: <br />14 A portable or part-time (folding) STOP sign that is electrically or mechanically operated such <br />that it only displays the STOP message during a power outage and ceases to display the STOP <br />message upon restoration of power may be used during a power outage to control a signalized <br />approach. <br />Support: <br />15 Section 9B.03 contains provisions regarding the assignment of priority at a shared-use <br />path/roadway intersection.