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Chapter 3 -United States Acoard PCe3f12 <br /> Advisory R302.2 Location. Where it is not feasible to provide a same-side <br /> alternate circulation path and pedestrians will be detoured,section 6D.02 of <br /> the MUTCD specifies that the alternate path provide a similar level of <br /> accessibility to that of the existing disrupted route. This may include the <br /> incorporation of accessible pedestrian signals(APS),curb ramps,or other <br /> accessibility features. <br /> R302.3 Protection.Where the alternate circulation path is exposed to <br /> adjacent construction,.excavation drop-offs,traffic,or other hazards,it shall <br /> be protected_ estrian barrio or chAINWIzing device complying <br /> with R302.4. <br /> Advisory 8302.3 Protection. When it is necessary to block travel at the <br /> departure curb to close a crosswalk that is disrupted by excavation, <br /> construction,or construction activity,care must be taken to preserve curb <br /> ramp access to the perpendicular crosswalk. This may require additional <br /> pedestrian channelization if only a single diagonal curb ramp serves the <br /> corner. <br /> Figures 6H-28 and 6H-29 of the MUTCD specify notification signage for <br /> pedestrian closings and detours.Audible signage triggered by proximity <br /> switches can provide information to pedestrians who do not use print signs. <br /> to2.4 Pedestrian Barricades and Channelizing D18s P §trian <br /> icades and channelizing devices shall be continuous stable, and non <br /> flexible and shall consist of a wall,fence,or enclosures specified in section <br /> 6F-58,6F-63,and 6F-66 of the MUTCD(incorporated by reference; see <br /> 104.2.4). <br /> Detectable Base.A continuous bottom edge shall be provided <br /> 50 mm (6 in)maximum above the ground or walkway surface. <br /> �302.4.1 <br /> 302.4.2 Height.Devices shall provide a continuous surface or upper rail <br /> 9 m(3.0 ft)minimum above the ground or walkway surface. Supports <br /> 11 not protrude into the alternate' th. <br /> R303 Curb Ramps and Blended Transitions <br /> R303.1 General.Curb ramps and blended transitions shall comply with <br /> R303. <br /> Advisory R303.1 General. Curb ramps can be a key source of wayfinding <br /> information for pedestrians who travel without vision cues if they are <br /> installed in-line with the direction of pedestrian travel at crossings. This is <br /> most easily accomplished by locating the ramp at the tangent point of the <br /> curb return,using either a small curb radius in an attached sidewalk or,in <br /> larger radii,a border or setback from the street edge. The Institute of <br /> Transportation Engineers(www.ite.ora)has undertaken an industry-wide <br /> effort to develop and standardize intersection plans that optimize <br /> wayfinding. The challenge for practitioners is to provide usability for <br /> pedestrians in wheelchairs and scooters with a rectangular ramp plan that <br /> can also be directional. <br /> R303.2 Types.Perpendicular curb ramps shall comply with R303.2.1 and <br /> R303.3; parallel curb ramps shall comply with R303.2.2 and R303.3; <br /> blended transitions shall comply with R303.2.3 and R303.3. <br /> Advisory R303.2 Types. This provision permits a combination of ramps and <br /> blended transitions. <br /> It will sometimes be necessary to limit the run of a parallel or perpendicular <br /> ramp in order to avoid'chasing grade'indefinitely.In new construction at <br /> standard curb heights,required level landings can provide a datum for <br /> measuring most curb ramp slopes. <br /> Limiting new ramps to an 8.3%slope on steep routes will result in a slight <br /> increase in grade on the balance of the route,but will facilitate street <br /> crossing and a timely and manageable ascent to the sidewalk,particularly <br /> important when crossing in traffic. <br /> http://www.access-board.gov/guidelines-and-standards/streets-sidewalks/public-rights-of-... 12/15/2014 <br />