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What it is the Literature Review Matrix? <br />Summarizes the journey <br />�� undertaken regarding speed <br />�:__� limits in both Minnesota <br />and nationwide <br />Covers the latest and most <br />= relevant speed limit <br />information available since <br />2008 <br />Summarizes both state and <br />nationwide publications <br />from 1993 to today <br />' Literature Review Matrix <br />r r i <br />Awmm iyofreseorchandidemtumrelatedto5pmdlimas <br />Manag011 <br />Tee goal of the Minnesota S�atewiae Speed Limit Vision Pool to develop a consul arrd unified message related to speed limits supported by clfies, counties, <br />special interests, public safety and enfo¢ement. Various types of research efforts were concluded to gather the latest and most relevant Information available The <br />literature review, matrix summer rims, in chronological order, both state and nationwide publications of this relevant speed limit information. <br />rubibho <br />1993 <br />Me ME Committee <br />Instal <br />Speed annoy shall only be establis on the basis of an englysinng study and caballed every 5 Y.S. <br />414-25 draflgulddtrws <br />Rxommended Phil <br />hUml/wwwbhiboro/ <br />hans«ration <br />Engineers llTE) <br />Commlttee4h <br />The engineering study should Include an anall of the current speed Manhattan of free Rowing vehicles The <br />speed limit wMln a stood mine shun be set at Me rrcarest 5 mph Increment to Me 85M percentlle spread «the <br />upper limit of be to mph par. <br />rtlu/Pe.sm htrnl <br />Ho.S In no rase shouldthespeel limit be set below this I percantlle sp NofhcoLfi lrg veMder <br />1998 <br />Synlhesho'Sn"Researrh <br />fetleral Highway <br />Past research has shown that the85% perrntlle speed cobdcles with the lowest accident rates and hall <br />Relatedm SprdarMSpeed <br />Administration <br />safe speed for ensnng coMitions as percNved by the majority of Mardi This research am approach are based <br />Mury'roun[ <br />(Final Fill <br />on the Sdomon Crash MACurve developetl In the I was for annul highways . Sdrmin reported that Me results <br />pppsJ/wwWmaa dot. <br />RD-911i <br />of his study showed tat 'Now speed drivers are more likely to be Involved In accidents than slativety high spend <br />aov/ouMlrthareVepria <br />dadI <br />safey/9659/m«ddm <br />ThisI passstudy concluded that -Mere IseNdence that crash risk is lowest near the average spead oftrafilc am <br />Increases for vehicles traveling much faster or slower Man average. In general, changing speed limns on low and <br />moderate spread rued s appears to have Into or no WI on speed and Mus little or no eRect on crashes. ThIs <br />suggests Mat drrrers travel at speeds they feel am reasonable and safe for the road and traffic regardless of Me <br />postediffif However,ther Is Ilmlttd evidence thatsuggeststhe neteffect ofspecd IlmRs may be p«Itlye on <br />ryztem wltle bags. More research is metletl Meraluate Mer ¢saferyeRMofspeetl llmttcM1anga <br />sal <br />Revlewd20mphronesln <br />WebsterD.al <br />A 2003 rwiewofhaffoftiou mph soeswirl had been Implemented In London l)n cones) found that they <br />London Footnote, <br />Iayf Vd <br />reduced Injury accidents by abouaLo%andfabl or serious accidents by 53%. <br />M1ttosl/www rosoa om/ <br />media/d«uments/roatl- <br />safen/zanoM1-ninesnano- <br />y«ed-Immraddwetnm <br />3aa7 <br />USLIMaS2, <br />FHWA am the <br />FHWAard N(HAP released USUM11S2MasslrtpraNtbners Insetting speed limits Mat are sefrcrdible <br />M1ttosl/safelvMwaAot <br />Natlonal Cooperative <br />mn9stmt and his. Wren med to determine appropriate speed limits, M6 web-bascd expert approach <br />aoyhollarral <br />Hlghwry, Research <br />Podded a systematic consistent method(oreaaminirg and welghirg(Mors In addition W we lade operating <br />Program lHCHI>P) <br />speeds <br />