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Chapter 3 -United States Acs_Board P 10 <br /> of'12 <br /> Advisory R305.7 Channelized Turn Lanes at Intersections.Accessible <br /> pedestrian signal devices installed at splitter and'pork chop'islands must <br /> be carefully located and separated so that signal spillover does not give <br /> conflicting information about which crossing has the WALK indication <br /> displayed. <br /> Additional guidance on signal types is provided in Advisory 8305.6.2. <br /> R306 Accessible Pedestrian Signals(APS) <br /> R306.1 General.Pedestrian signals shall comply with R306. <br /> R306.2 Pedestrian Signals.Each crosswalk with pedestrian signal <br /> indication shall have an accessible pedestrian signal which includes audible <br /> and vibrotactile indications of the WALK interval.Where a pedestrian <br /> pushbutton is provided,it shall be integrated into the accessible pedestrian <br /> signal and shall comply with R306.2. <br /> Advisory 8306.2 Pedestrian Signals.Signals should generally sound and <br /> vibrate throughout the WALK interval. Where signals rest in WALK,audible <br /> operation may be limited to a repetition at short intervals rather than <br /> continuous sounding for several minutes. <br /> R3O6.2.1 Location.Accessible pedestrian signals shall be located so that <br /> the vibrotactile feature can be contacted from the level landing serving a <br /> curb ramp,if provided,or from a clear floor or ground space that is in line <br /> with the crosswalk line adjacent to the vehicle stop line. <br /> R3O6.2.1.1 Crossings.Accessible pedestrian signal devices shall be 3.0 m <br /> (10.0 ft)minimum from other accessible pedestrian signals at a crossing. <br /> The control face of the accessible pedestrian signal shall be installed to face <br /> the intersection and be parallel to the direction of the crosswalk it serves. <br /> R306.2.1.2 Medians and Islands.Accessible pedestrian signals located in <br /> medians and islands shall be 1.5 m(5.0 ft)minimum from other accessible <br /> pedestrian signals. <br /> R3O6.2.2 Reach and Clear Floor or Ground Space.Accessible <br /> pedestrian pushbuttons shall be located within a reach range complying <br /> with R404.A clear floor or ground space complying with R402 shall be <br /> provided at the pushbutton and shall connect to or overlap the pedestrian <br /> access route. <br /> R306.2.3 Audible Walk Indication.The audible indication of the WALK <br /> interval shall be by tone or speech message. <br /> R3O6.2.3.1 Tones.Tones shall consist of multiple frequencies with a <br /> dominant component at 880 Hz.The duration of the tone shall be 0.15 s <br /> and shall repeat at intervals of 0.15 s. <br /> Advisory R306.2.3.1 Tones.Many new accessible pedestrian signal <br /> installations in the US use speech messages, which are perceived as being <br /> more user-friendly than tones. However,such messages may not be <br /> intelligible under high-ambient-noise conditions or to non-English speakers. <br /> Electronic tones are more universal and unambiguous.Section 4E.06 of the <br /> MUTCD specifies content of speech messages. <br /> R3O6.2.3.2 Volume.Tone or voice volume measured at 92 cm(3.0 ft) <br /> from the pedestrian signal device shall be 2 dB minimum and 5 dB <br /> maximum above ambient noise level in standard operation and shall be <br /> responsive to ambient noise level changes. <br /> Advisory R306.2.3.2 Volume. Where additional volume or beaconing <br /> features are available on pedestrian activation,they will momentarily <br /> exceed volume limits. <br /> R3O6.3 Pedestrian Pushbuttons.Pedestrian pushbuttons shall comply <br /> with R306.3. <br /> R3O6.3.1 Operation.Pedestrian pushbuttons shall comply with R405.4. <br /> http://www.access-board.gov/guidelines-and-standards/streets-sidewalks/public-rights-of-... 12/15/2014 <br />