AgdaPkt 2020-08-24 Joint SA PFA - Laserfiche WebLink

Browse Search

6.G. - Page 4 of 9 All -way Stop Sign Analysis Based on the identified issues and collision factors, five intersections along the corridor were evaluated for all -way stop control: the intersections of Roosevelt Avenue with Connecticut Drive, McGarvey Avenue, Fulton/Ebener Street, Clinton Street, and Adams Street. For all -way stop control evaluation, minimum and maximum traffic volume on the major street, minimum traffic volume on the minor street, collision history, pedestrian generator, proximity to school, and 85th percentile speed are studied. Out of the five mentioned intersections, only the intersections of Roosevelt Avenue with Adams Street and Connecticut Street met standards for all -way stop control. Through the community planning process residents expressed a preference for alternatives to all -way stops at these two intersections and these preferences are reflected in the conceptual design. Roundabout operation assessment A roundabout capacity assessment was conducted for intersections of Roosevelt Avenue with McGarvey Avenue and Upton Street in response to community feedback and in light of the intersection volumes and geometry. Following the Highway Capacity Manual (HCM) 2010 methodology, the reviewed criteria included new peak hour traffic counts and capacity thresholds for two-lane roundabouts to determine if a roundabout would affect delay or queuing at the intersections. Based on the assessment, roundabouts at these intersections were feasible alternatives as the intersections would operate with minimal delay and queuing on most approaches. Community Engagement Stage 2 (October — December 2019) The second stage of community engagement included in-person and online open houses along with the second community survey, was focused on gathering feedback on feasible improvement alternatives along the corridor. The City received about 117 comments and 640 location -specific votes on individuals' preferred alternatives. The outcome of this stage helped the project team to come up with the preferred alternative for each issue area. However, the preferred alternative for some locations needed refinements to address more community concerns and to account for the constructability and cost of specific improvements. Refined Preferred Alternatives o Roosevelt Avenue/Upton Street Intersection: even though more community members supported a roundabout at this location (43 roundabout vs. 38 curb extension), the proposed preferred alternative for the Upton Street intersection is curb extensions with high -visibility school crosswalks. A roundabout at this intersection is feasible; however, it would be very expensive and it would impact the adjacent gas station driveways. Curb extensions at this intersection specifically benefits Roosevelt Elementary School students by reducing crossing distances. Page 4 of 7 .1A . City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.org 83