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47 LOCAL STATE-AID ROUTE STANDARDS,FINANCING 8820.9995 <br /> 8820.9995 MINIMUM BICYCLE PATH STANDARDS. <br /> Minimum Bicycle Path Standards(a) <br /> For Off-Road Bike Path Design, the following shall apply: <br /> Minimum Surface Width(two-way) 8 ft(b) <br /> Shoulder/Clear Zone 2 ft(c) (d) <br /> Inslope Maximum 1:2 (rise:run) <br /> Design Speed 20 mph(e) <br /> Vertical Clearance over lane and 9 ft-9 in (7 ft-9 in if passage of emergency or <br /> shoulder maintenance vehicles is not required) <br /> (a)For on-road bicycle facilities,the current Minnesota Department of Transportation <br /> bicycle design guidelines are recommended for design purposes. <br /> (b)Ten feet is desired for a combined bicycle/pedestrian path. Five feet is required for <br /> a one-way bicycle path. <br /> (c) Whenever practicable,the shoulder/clear zone of an off-road bike path should be <br /> carried across bridges and through underpasses. Minimum structure clear width must be 12 <br /> feet. When the full width of the approach bike path(surface width plus shoulder/clear zone) <br /> is greater than the proposed clear width of the structure,then lead-in bicycle safety railing <br /> is required at each end of the bridge or underpass. As an alternative to lead-in bicycle safety <br /> railing,the surface width of the approach bike path may be narrowed at a 1:50 taper while <br /> maintaining minimum surface width and shoulder/clear zone through the structure. <br /> (d) Clear zone is measured from the edge of the bicycle travel lane. <br /> (e)Use a 30 mph design speed for grades longer than 500 feet and greater than four <br /> percent, from the uphill point where the grade equals four percent to 500 feet beyond the <br /> downhill point where the grade becomes less than four percent. The maximum allowable <br /> grade is 8.3 percent. <br /> Statutory Authority: MS s 14.389; 162.02; 162.09 <br /> History: 20 SR 1041; 23 SR 1455; 24 SR 1885; 29 SR 449; 32 SR 608; 36 SR 925 <br />