Resolution No. 4500 - Laserfiche WebLink

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Vehicle Lanes: Two 10' vehicle traffic lanes are required on local residential streets when traffic volumes are expected to exceed 750 vehicles per day. On local residential streets with traffic volumes less than 750 vehicles per day, a single 14' traffic lane may be permitted for both directions of vehicular travel. The single traffic lane is intended to create a "queuing street" such that when opposing vehicles meet, one of the vehicles must yield by pulling into a vacant portion of the adjacent parking lane. This queuing effect has been found to be an effective and safe method to reduce speeds and non- local traffic, Two 12' vehcile traffic lanes are required on local commercial and industrial streets. In special circumstances, such as where a local street intersects with a collector or arterial street~ additional width may be required for safe turning movements. Medians: Center medians are a design option for Lo\v- Volume and Medium-Volume Residential Streets, but the street design must ensure the minimum 14' clear lane needed for fire apparatus. Medians shall be landscaped with groundcover, trees, and shrubs less than 3' in height. Drainage and Curbs: Drainage inlets shall be bicycle-safe as required by ORS 810.150. Curb inlets as shown in Figure 2 shall be used unless alternate style is required or approved by the City Engineer Figure 2 DRAINAGE INLET Combined vertical curb and gutter shall be used on all streets with an enclosed drainage system. A modified rolled curb with a slightly rounded top and bottom may also be used as shown on Figure 3; however, no other rolled curb designs are permitted. Gutter \vidth shall be 18" wide measured from the face of the curb. In private alleys paved with asphalt, inverted concrete curbs as illustrated in Figure 4 are required to prevent the pavement edge from breaking down. Inverted curbs are also required on Access Lanes that utilize adjoining grassed swales for drainage.