05/19/98 - Laserfiche WebLink

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Background: Over the Summer and Fall of 1997, the citizens along 149th Avenue between C.R. #56 and Uranimite Street expressed a great deal of concern relative to speeding on that segment of roadway. Attempts to mitigate the speeding problem included increased police patrol, placement of an electronic speed display monitor, and the lpstallation of a temporary circle at the intersection of Peridot Street and 149th Avenue in late Fall of 1997. At the April 14, 1998 meeting, City Council directed that a feasibility study for the installation of a cul-de-sac be made. Subsequent discussion of the problem at the April 21, 1998 Road and Bridge Committee meeting resulted in the consensus that a "horse-shoe" or diagonal barrier be placed across the intersection of 149th Lane and Uranimite Street. This study is intended to outline the improvements, costs, and financing of both these alternatives for traffic calming. Both of these alternatives will result in significant changes in the traffic patterns within the project area neighborhood illustrated in Figure 1. A traffic count taken on April 30, 1998 shows 776 trips per day down 149th Avenue with approximately 150 trips generated locally. Therefore, approximately 625 trips per day can be expected to be shifted to other local streets. It is beyond the scope of this feasibility study to predict traffic increases on other neighborhood streets. Alternative A: Cul-De-Sac at 149th Avenue and Uranimite Street This alternative would consist of the construction of a standard 90~foot diameter cul-de-sac within the existing right-of-way of 149th Avenue as is illustrated in Figure A. In addition, it would be necessary to remove 300 feet of pavement along the present Uranimite Street between 149th Avenue and 149th Lane. The scope of the work would involve pavement removal, grading, placement of Class 5, four inches of bituminous paving, and turf restoration with topsoil seed, fertilizer and mulch. There would also need to be some new traffic control signage at 149th Lane and Uranimite Street and a dead end sign at 149th Avenue and Peridot Street. It is not anticipated that any drainage structure will be required. Costs for this installation are summarized in Appendix A. In addition to the construction costs, project overhead of 25% is estimated to provide for surveying, engineering design and inspection, and administrative costs associated with the public hearing and assessment process. Alternative B: Install Dia~onal Divertor at 147th Lane and Uranimite Street This alternative consists of the placement of a barrier which would run from the southwest to the northeast comer of the intersection of 149th Lane and Uranimite Street. This installation would force all traffic to make only right turns at the intersection This alternative is illustrated in Figure B. This alternative would involve the purchase and placement of concrete "Jersey" barrier across the roadway. The project would also include reflectorization of the barrier and advance traffic signage. The cost of this installation is estimated to be $3,975 which includes the purchase and placement of the barriers, reflectorization, and signage. It also includes a 25% project overhead cost for the necessary public hearings and administrative work related to the assessment procedure. It should also be noted that these barriers could be rented for a three-month period for $600.