Agenda - Council - 12/14/2004 - Laserfiche WebLink

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REVIEW WARNING.SIGN PLACEMENT AT 169Tu AVENUE AND NEON STREET By: StevenlJa.nkowski, City Engineer Background' . At the September 21, 2004 Public Works Committee meeting a traffic concern regarding. vehicles leaving the roadway at this ninetydegree bend resulted in,the placement of warning ' signage alerting motorists to this situation. Additionally there was Concern over the speed at which drivers vcere approaching .this intersection and it was felt that the warning signsmay have an affect on slowing traffic. Warning signs were posted as illustrated'in Figure 1 and speed surveys were taken before and after the posting of the wmxfing sig-ns utilizing the Police department's "Smart Trailer." Staffhas also received a request from Mr. Scott Baumgartner who resides at 5850 169th Avenue, which is located at the southeast corner of the tee intersection of 169th Avenue and Neon Street, to reconsider the placement of the signage citing aesthetic concerns. A comparison of the speed studies before and after the sig-ning shows a decrease of three miles per hour in average maximum speed following flue posting. Although this data Suggests that the si~mxage may have a positive effect on reducing speed, fUrther studies ShoUld be conducted to determine whether this is a long ten'n change. The information supplied by the second study also confn-ms that a very small percentage (1%) of motorists continue to travel at an uru'easonably high speed of ~'eater than 40 miles per hour. I have attached a figure illustrating the placement of sig-nage in the area of the intersection. Also attached are ti~ee pages from the Manual On UnifOrm Traffic Control Devices wh/ch discuss the use of warning sig~s which are available for this situation. Sigaq WI-1 is an advance warning sigxa which has been posted on the north leg of this intersection. Spacing requirements preclude th/s si~! fi'om being placed on the east leg as it would need to be located in TH 47. There would be a choice of warning sigmas available for placement at the curve itself, the large arrow, W1-6, or the chevron, W 1-8, could be used. The guidance section relating to the use of chevrons states that at least two chevrons should be in view until the change in ali~-m-~ent elin'finates the need for the si~xs. Recommendation: Staff will be reviewing the requirements for posting of the chevrons to determine whether the number used can be reduced fi'om .the current number posted. Action: Based upon discussion. Reviewed by: Public Works Director/Fire Chief Assistant Public Works Director/Principal Engineer Street Maintenance S upetwisor Po lice Chief PV¢: i 1/16/04