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IX <br /> r�p <br /> 331 TRAFFIC REGULATIONS 169.14////" <br /> 69.1 <br /> speed limit up street r hi y,or part thereof,within their respective juris ic- <br /> tions and not a part of the trunk highway system is greater or less than is reasonable <br /> or safe under existing conditions, they may request the commissioner to authoze, <br /> upon the basis of an engineering and traffic investigation, the erection of approp <br /> signs designating what speed is reasonable and safe,and the commissioner may a tho- Q <br /> rize the erection of appropriate signs designating a reasonable and safe speed 1 mit �� '• <br /> thereat, which speed limit shall be effective when such signs are erected. Any sp eds <br /> in excess of these speed limits shall be prima facie evidence that the speed is not reas n- <br /> able or prudent and that it is unlawful; except that any speed limit within any muni i <br /> pality shall be a maximum limit and any speed in excess thereof shall be unlawf <br /> Alteration of speed limits on streets and highways shall be made only upon authori S� <br /> of the commissioner except as provided in subdivision 5a. <br /> Subd. 5a. Speed zoning in school zones. Local authorities may establish a school <br /> speed li t with" ch a u npublic school upon the basis of an <br /> engineerin nd�traffi nvesti atio s rescribed y the commissioner of transport i• <br /> tion.The establishment o a school speed limit on any trunk highway shall be with e <br /> .cot e commissioner o transportation. Such school speed limits shall b in <br /> effect when children are present, going to or leaving school during opening or cl s n <br /> hours or during school recess periods. The school speed limit shall not be lowe t a <br /> 1�miles per hour and shall not be more than 20 miles er hour is e ' <br /> speed limit on an affected street or way 1 t e established speed limit is 4 m <br /> per hour or greater. <br /> The school speed limit shall be effective upon the erection of appropriate sig des- <br /> ignating the speed and indicating the beginning and end of the reduced speed zone. y <br /> speed in excess of such posted school speed limit is unlawful. All such signs shall be <br /> erected by the local authorities on those streets and highways under their respective <br /> jurisdictions and by the commissioner of transportation on trunk highways. ' <br /> For the'purpose of this subdivision, "school zone" means that section of a street <br /> or highway which abuts the grounds of a school where children have access to the street <br /> or highway from the school property or where an established school crossing is located s <br /> provided the school advance sign prescribed by the manual on uniform traffic control <br /> devices adopted by the commissioner of transportation pursuant to section 169.06 is <br /> in place.All signs erected by local authorities to designate speed limits in school zones <br /> shall conform to the manual on uniform control devices. <br /> Subd. 5b.Segments in urban districts.When any segment of at least a quarter-mile <br /> in distance of any city street,municipal state aid street or town road on which a speed <br /> limit in excess of 30 miles per hour has been established pursuant to an engineering and <br /> traffic investigation by the commissioner meets the definition of"urban district" as <br /> defined in section 169.01, subdivision 59, the governing body of the city or town may <br /> by resolution declare the segment to be an urban district and may establish on the seg- <br /> ment the speed limit for urban districts prescribed in subdivision 2. The speed limit _ <br /> so established shall be effective upon the erection of appropriate signs designating the <br /> speed and indicating the beginning and end of the segment on which the speed limit <br /> is established, and any speed in excess of such posted limits shall be unlawful. A copy <br /> of the resolution shall be transmitted to the commissioner at least ten days prior to the <br /> erection of the signs. <br /> Subd. 5c. Speed zoning in alleyways. Local authorities may regulate speed limits <br /> for alleyways as defined in section 169.01 based on their own engineering and traffic t <br /> investigations. Alleyway speed limits established at other than ten miles per hour shall <br /> be effective when proper signs are posted. <br /> Subd. 5d. Speed zoning in work zones;surcharge.(a)The commissioner,on trunk <br /> highways and temporary trunk highways,and local authorities,on streets and highways <br /> under their jurisdiction, may authorize the use of reduced maximum speed limits in <br /> highway work zones. The commissioner or local authority is not required to conduct <br /> an engineering and traffic investigation before authorizing a reduced speed limit in a <br /> highway work zone. - <br />