2010-04-14 CC Packet - Laserfiche WebLink

Home Browse Search

August 1, 2007 TRAFFIC ENGINEERING MANUAL 13 -6.08 Checklist of Items Submitted with Speed Report 1. Administration Items •. Et ewtutio n or n =MW for i sWdV faom. road a uuwrl,". • Exact road; name acrd termini of stLm�; • Entire control section reviewed and listed on Form 29212. • Reaction of local officials to proposed zoning. • Reactim erf' eruforee meat emiew's toz f zoa . • Reiative correspondence fivm cites or potiitical, factions, • in place road. reconstructed or new construction. • Other ?'_ Roaadwav Features • North arrow, scale and copy of map with designated road shown. • Roadway width, shoulder width, surface type and condition. • ITrbw di4net lid and inzcoeposated ciity fant& Lamums of buildings and LuL w cs along roes& • Crossroads with names or numbers. • Locations of traffic signals, signs and /or markings. Limits of propose 1, zoee& tkits cif existia zones and, the liii nds of ffie zones: eatermg and e:<x�g the stu& ate. • Horizontal and vertical curve locations. • School zones, playgrounds or other special zones. • Cram rapes: for the roadway 3. Speed Data • Location o>f radar the -eks, s&wa on map. • Speed data shed with 10 mph Ear- pest in lam 50th Percentile and 35th percentile shov�n. • Range of speeds at which test runs were executed if radar checks not feasible. • Corresponding advisory speeds listed for in place warning signs. • show values of any other in place shed zones such as school zene speed Limit or bridge- speed limit . 13 -6.09 Speed Zones on Gravel Roads Cim el row hay. a coamdera blie diffivemes hvm paved roams . Typ3iv4 y- gray eI raids am, designed wiqb rniurma, design criteri& are sulSi to) fluctuating surface coadititxm have law enfcreernent miatih, and serve law ADT`s usually comprised of local repeat traffic. The principles of speed zoning are described in the ITE Traffic Engineering Handbook (4th Edition). In summary they address reduced stopping distance, traffic flow, capacity, safety and crash, severity reduction- it is very dificuft to, equate &ese principles, with the cs ndriitioas, that usuafly exist on a gravel road. Duce to, these principles and eperational characteristics of gravel road& Mn/DOT has generally not set speed limits on gravel roads and has relied on the "Basic Rule" described in MN Statute 169.14. It is Mn!I3tJT"s pal icy ter evaluate gravel roads based on the merits of &e principles, dw,6"k cd above aced: if tfheet priticip1cs are not reset or there wffl be no improverrtent in the ep waCion or safety of the read- then a reduced steel limit will not be authorized. Mn/DOT will honor all requests to investigate any type of road and perform the traffic investigation. Due to workload and economic factors, it will be necessary to quickly and accurately determine the tyve of read and whether speed lirnits, would benefit tlD-- read based on the aboN a principles- To aid the study teams, the following list of typical qualifications should be used in the first phase of the investigation to facilitate their prompt judgement of whether or not a speed limit should be established on a gravel MQO-L 13 -27 40