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Type of Left Turn Phasing to be Used <br />If one or more warrant for left turn signalization is met, a decision needs to be made whether to install <br />protected -only, protected - permissive or permissive- protected phasing. <br />Protected -only phasing should be installed at locations which meet any of the following conditions: <br />Condition <br />85th percentile speed or posted speed is greater than 45 mph. <br />Three left turn accidents per year or five in two years. Include left <br />turn accidents involving pedestrians. <br />Three or more lanes of opposing traffic. <br />Dual left turn lanes. <br />U -turns are permitted. <br />Sight distance to opposing traffic is less than 250' when the 85th <br />percentile speed is below 35 mph, or less than 400' when the 85th <br />percentile speed is over 35 mph or higher. <br />The intersection has an unusual geometric configuration, or when a <br />significant portion of the pedestrians or drivers using the intersection <br />are children, elderly, or disabled, or when an engineering <br />investigation indicates a need for protected -only phasing. <br />Protected - permissive phasing may be considered at locations which satisfy warrants for left turn <br />phasing, but don't meet protected -only warrants. <br />Permissive- protected phasing may be used at locations which meet any of the following conditions <br />Condition Condition Met? <br />At a "T" intersection with no opposing left turn. <br />If the opposing left turn is a prohibited movement. <br />If needed for progression or operational concerns. <br />Condition Met? <br />LT -WARR FRM <br />