Agenda - Public Works Committee - 06/18/2001

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P.W. CASE #: t~ REQUEST BY RESIDENT TO INSTALL A THREE-WAY STOP SIGN AT 146TM AVENUE N,W./IODINE STREET NW By: Brian E. Olson, City Engineer Background: It was brought to our attention by a resident of the Wood Pond Hills subdivision that a sight restricted intersection exists on 146th Avenue NW and Iodine Street. There is also a bus pickup for school children at the intersection which leads to more uncertainty. Staff visited the site and performed a speed and volume count near the intersection to check if volume would warrant the placement of an all-way stop sign. The results of the speed and volume indicate an average speed of 23 mph and approximately 500 vehicles per day on Iodine Street. Observation: With the amount of information presented above, it is not possible to determine whether a three-way stop condition would be warranted under the volume criteria cited in the manual but it is highly unlikely.based on the information provided by the speed trailer. Placement of stop signs require meeting warrants which are defined in the manual of Uniform Traffic Control Devices unless a "combination of high speed, restricted view, and serious accident record indicate a need for control by the STOP sign." Staff did also visit the intersection to check on sight visibility issues. Attached to this case is drawing of the intersection with the profile of Iodine Street NW. It appears that the intersection does have sight restrictions due to it being on the crest of a hill and Staff would recommend placing a STOP sign on the Iodine Street NW leg of the intersection. Staff would also recommend the installation of advanced warning for the east and westbound motorists to let them know of a blind intersection ahead by the placing of signs resembling the sign (W2-2) on the attached page from the MUTCD. Further Staff has contacted the school district to talk about the possibility of moving the bus pick to another area due to the concerns expressed combined with the sight restrictions at this intersection. We hope to have heard from them by the meeting and will report on the conversation. Recommendation: It is staff's recommendation that a stop sign be placed on Iodine Street and Would also recommend the installation of advanced warning for the east and westbound motorists to let them know of a blind intersection ahead by the placing of signs resembling the sign (W2-2) on the attached page from the MUTCD. Committee Action: Based on discussion. Review by: Public Works Director P.W. 06/18/01 5