(a) Warrants for no-turn-on-red restrictions. The following warrants may be used in addition to the warrants for no-turn on red restrictions in the MUTCD (relating to traffic signal signs).

1. (1) A right turn on red, or left turn on red from a one-way highway to another one-way highway, may be prohibited from an intersection approach where an engineering and traffic study indicates that one or more of the following conditions exist:

   1. (i) The available corner sight distance between a driver desiring to turn on red and an approaching vehicle on the cross street is less than the minimum shown on the following table:

      Speed Limit or 85th Percentile Speed	Minimum Sight Distance to Approaching Vehicle*
      	Std.	Cross Street Approach Grade
      	Values	-9%	-6%	-3%	3%	6%	9%
      25	152	173	165	158	147	143	140
      30	197	227	215	205	200	184	179
      35	247	287	271	257	237	229	222
      40	301	354	333	315	289	278	269
      45	360	427	400	378	344	331	320
      50	424	507	474	446	405	388	375
      55	493	593	553	520	469	450	433

      * Measure sight distance from a location 10 feet before a marked pedestrian cross walk or, if none, 10 feet from the edge of the cross street roadway or curb line, where both the eye and the approaching vehicle are 3.5 feet high.

   2. (ii) The intersection has more than four approaches or has restrictive geometry that is likely to cause vehicular conflicts which are not easily recognized by drivers.
   3. (iii) The turning movement is allowed from more than one lane on a specific approach.
   4. (iv) The vehicular turning movement would result in significant vehicular and pedestrian conflicts, such as locations where the crosswalk is designated as a school crossing or is used by large numbers of children, senior citizens or persons with physical disabilities. A no-turn-on-red restriction at these locations may only apply during the time periods that significant vehicular-pedestrian conflicts would occur, in accordance with paragraph (3).
   5. (v) Opposing traffic has unusual movements, such as double left turns, which would not be expected by drivers turning on a red signal.
   6. (vi) An analysis of vehicle crash data indicates that the turn-on-red movement has created an unsafe condition.

2. (2) Part-time or intermittent prohibition of the turn-on-red movement must be used at locations where a potential safety concern exists for only a portion of the day. These restrictions must be implemented by the use of one or more of the following:

   1. (i) A Restricted Hours Panel (R10-20A) under the No Turn On Red Sign.
   2. (ii) A supplemental message incorporated directly into the No Turn On Red Sign.
   3. (iii) A sign designating the hours the restriction is effective.
   4. (iv) A blank-out No-Turn-On-Red Sign.
3. (3) A part-time or intermittent prohibition of the turn-on-red movement may be used at an intersection approach where vehicles turning on red would cross an at-grade railroad crossing within 200 feet and the traffic signal controller is preempted during train movements during the time the signal controller is preempted in accordance with paragraph (2).

(c) Engineering and traffic studies. Engineering and traffic studies required by subsection (a)(1) shall be conducted by local authorities. The Department will be responsible for conducting the study at the following locations:

1. (1) At intersections where the traffic signal controller is preempted during train movements for a nearby crossing.
2. (2) At new or revised traffic signal installations when the traffic signal is designed by the Department.