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0 No <br />Mn/DOT Traffic Signal Timing and Coordination )Ulanual <br />Varying Between Protected, Protected/Permissive, and Permissive Operation - <br />As discussed above, the FYA can be considered a variable operation signal indication. Consider the <br />following items: <br />✓ All FYA signals may vary operation between protected, protected/permissive, and permissive <br />operation at various times of the day and night. <br />Each signal approach will need to be analyzed individually to determine the time -of -day FICA <br />operation by considering the following criteria: <br />a) Cross -product volumes of left turns and opposing throughs at various times of day <br />b) Speed limit <br />c) Sight distance limitations <br />d) Number of opposing through lanes <br />e) Double left turn lanes or single left turn lanes <br />f) Opposing left turn lane offset <br />g) Cross street or mainline approach <br />h) Comprehensive left turn crash analysis of approaches with similar characteristics <br />Test for Protected Only Operation 24 Hours per Day <br />In some cases, the left turn indication should run in the most restrictive Protected -Only mode 24 hours per <br />day. Refer to Exhibit 3-13 for the Protected Onfy Left Turn Operation Guidelines. if the answer to question <br />1 or 2 is "yes", then protected operation should be used throughout the day. <br />Exhibit 3-13 Part 1: Protected -Only Left Turn Operation 24 Hours per Day <br />Part 1: Protected Only Operation - 24 firs/day Guidelines <br />Question 1: Conflicting Left Turns <br />. ' Do the opp3sirig left turn paths corif)icti <br />Question 2: Limited Sight Distance <br />Ci Does thb left turner have very limited sight distahr;e'as <br />Yes <br />defined in'the current AASHTO "A Policy do Geometric <br />besigns of Highways and Streets"?. <br />Jffih.eAnswer=is;Ye to;cui3sfiofa1=or2 <br />>ifthe'Anskve isNo.#o;;al(oftheabove, <br />i.ise ProtecfieS <br />?:Jf ;th'e';aris.,ifver is Yes; tliei use <br />Pro ected.Op"elation.24 hbursJday, <br />> ff t(ie-arswer is No, proceed to the <br />• • . next quesfin. . • • <br />24 hours%day ': <br />>'Iftlie"ansyJ risYe"s;•thenuse <br />Protected Operation.24 hours/day. : <br />> If the answer is 1 , proceed to part 2 <br />to check for. FYA by TOD. <br />if the answer is "yes" to any of the questions in Part 1, then Protected -Only operation is suggested <br />throughout the day. If the answer to ail of the questions is "no", then proceed to Part 2 (Exhibit 3-14) to <br />check for permissive FYA operation by time of day. <br />Page 13-28 Local Intersection Concepts <br />May 2011 <br />