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37 LOCAL STATE-AID ROUTE STANDARDS,FINANCING 8820.9941
<br /> (SL=shared lane;BL=bicycle lane;WOL=wide outside lane;PS=paved shoulder;SUP
<br /> = shared use path)
<br /> Engineering judgment should be used to choose a lane-width, on-road bicycle facil-
<br /> ity, or shoulder width dimension other than the widths indicated in the chart. Factors to
<br /> consider include safety, speed,population/land use,benefit/cost analysis,traffic mix,peak
<br /> hourly traffic,farm equipment, environmental impacts, terrain limitations, bicycle traffic,
<br /> pedestrian traffic,on-street parking,intersection and driveway spacing,rights-of-way con-
<br /> straints,vehicle turn lane configuration,sight distance,sight lines,bus routes,other nonmo-
<br /> torized uses,functional classification,or other factors. Dimensions less than those indicated
<br /> in the chart require a variance in accordance with parts 8820.3300 and 8820.3400.
<br /> (a) One-way turn lanes must be at least ten feet wide,except 11 feet is required if the
<br /> design speed is over 40 mph.
<br /> (b) Curb reaction distance may be reduced to two feet if there are four or more traffic
<br /> lanes and on one-way streets.
<br /> (c)No parking is allowed on streets with six or more traffic lanes or when the posted
<br /> speed limit exceeds 45 mph.
<br /> (d) Curb reaction shall be provided unless on-street parking, a bicycle facility, or a
<br /> wide outside lane are provided adjacent to the curb. The dimensions for wide outside lanes
<br /> include the curb reaction distance.
<br /> (e) When creating a multimodal design with a combination of vehicle lane, parking
<br /> lane,and bikeway lane widths,if a vehicle lane width of less than 11 feet is used,the parking
<br /> and bikeway lanes shall be at least one foot wider than the minimum widths. Engineering
<br /> judgment should be used to choose a vehicle lane width of less than 11 feet. Additional
<br /> factors to consider include the types of vehicles (buses, trucks, etc.), peak hour counts,
<br /> turning movements,population/land use,crash history/analysis,terrain limitations,bicycle
<br /> traffic,pedestrian traffic,other nonmotorized uses, and snow storage.
<br /> (f)In determining the parking lane width,the roadway ADT and the vehicle mix shall
<br /> be taken into consideration for residential, commercial and/or industrial areas, or for a
<br /> mixed use thereof.
<br /> One-way streets must have at least two through-traffic lanes.
<br /> When a raised median is included in the design of the two-way roadway, a one-foot
<br /> reaction distance to the median is required on either side of the median. Minimum median
<br /> width is four feet.
<br /> Urban design roadways must accommodate a minimum nine tons structural axle load
<br /> design.
<br /> Roadways not on the state-aid system are not subject to the minimum structural design
<br /> strength requirements.
<br /> The minimum curb-to-curb width of a new bridge must be the required street width,
<br /> but in no case less than required per Minnesota Statutes, section 165.04. HS 25 loading
<br /> with AASHTO Standards Specifications or HL-93 loading with load and resistance fac-
<br /> tor design(LRFD) is required for new or reconstructed bridges and a minimum of HS 18
<br /> loading is required for all rehabilitated bridges. When the new bridge approach roadway
<br /> includes elements for the accommodation of pedestrians or bicycles,the new bridge width
<br /> must also provide for pedestrians or bicycles unless pedestrians or bicycles are otherwise
<br /> accommodated.
<br /> For ADT less than 150, the widths of bridges to remain must be at least the sum of
<br /> the lanes. For ADT greater than or equal to 150,the widths of bridges to remain must be
<br /> at least the sum of the lanes plus one-half the sum of the shoulders,parking lane, and curb
<br /> reaction distance.
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