4.3.A. SR 02-14-2011 - Laserfiche WebLink

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The attached figure shows the existing sight distances for drivers on Xavier Street who are attempting to make a left turn to go west on 193` Avenue. The red line identifies the current (1 /31 /11, after snow was removed) sight distances for both a driver stopped at the stop bar and a driver who pulls ahead to the edge of the traveled lane. Similarly, the blue lines identify the sight distance during the summer, when there is no snow limiting the line of sight. In all cases the sight distance is less than the required 400-feet for this intersection. The Minnesota Manual of Uniform Traffic Control Devises (MMUTCD) provides `Guidance' and `Options' for the use of a 4-way stop to control intersections. The traffic levels and vehicle speed have remained nearly the same now as they were during the traffic study completed in May 2010, thus, not meeting the warrants according to the `Guidance' of the manual. The `Options" described in the MMUTCD allow for the installation of a 4-way stop if there is: A) The need to control left-turn conflicts; B) The need to control vehicle/pedestrian conflicts near locations that generate high pedestrian volumes; C) Locations where a road user, after stopping, cannot see conflicting traffic and is not able to reasonably safely negotiate the intersection unless conflicting cross traffic is also required to stop; and/or D) An intersection of two residential neighborhood collector (through) streets of similar design and operating characteristics where Multi-way stop control would improve traffic operational characteristics of the intersection. Based on this review, both Options A and C support the installation of a 4-way stop at this intersection. I recommend the traffic control at this intersection be changed to a 4-way stop condition in accordance with the standards set forth by the MMUTCD and the MnDOT Road Design Manual. Being this intersection is on the State Aid system and was installed using State Aid funds, I have discussed this potential modification with the District State Aid Engineer. The State does not have any objections with the installation of a 4-way stop in this location. In discussing this change with the street department, the sign modifications can be completed by city staff. The changes would include the removal of the pedestrian crossing signage and replacement with stop and stop ahead signs placed in accordance with MMUTCD layouts. The street department will remove and inventory the pedestrian crossing signs for reuse elsewhere on the system in the future. The costs associated with the signing modifications will be $451 and come from the street maintenance sign budget. In addition to the new signage at and in advance of the intersection, temporary `traffic control change ahead' signs will be placed to warn motorists of the change. These signs will be left in place for a few months or until motorists get used to the change. The police department will also be asked to spend some time near the intersection to help raise awareness of the traffic control change. N:\Public Bodies\City Council\Council RCA\Agenda Packet\02-142011\Engineering Update.docx