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HomeMy WebLinkAboutMarch 26, 2014 council presentationCouncil Work Session #4 Tonight’s Objectives Review activities since the January work session Discuss the design elements of the project Develop the design elements as they will be presented on the Project Concept Statement for submittal to Iowa DOT Agenda: Recent public involvement activities Design concept and elements Design concept construction impacts and FAQ Recent stakeholder engagement with: Bella Vista Individual property owners Civic organizations Hancher/Mayflower teams Technical Advisory Committee Pre-Design Open House: Held February 25th at Public Library More than 100 attendees Displayed the Design Concept with Council parameters Formal presentation and informal discussions Pre-Design Open House – Key Takeaways: Aesthetics – maintain views of the river, park and trees Sidewalks along entire east side of Dubuque Pedestrian crossings are important to provide Speed limit – evenly split between current and all 25 mph Dubuque and Park turn lanes important Keep construction as short as possible Pedestrian •Sidewalk on east side to facilitate movement between locations on east side and to provide routes to signalized crossings •All sidewalks will be brought up to ADA standards •Grade separated crossing of Park Road •Protected sidewalks on Park Road Bridge Bicycle •Bike trail built to full ASHTO standards along west side of Dubuque Street •Grade separated crossing of Park Road for River Corridor Trail Transit – Improved geometry for bus movements Vehicular – Reduce delay at the Dubuque Street Park Road intersection All Modes •Improved flood protection •Everything brought up to new condition Design parameters and elements Cross section primer Design concept discussion •Features •Renderings •Cross sections Partial Through Arch bridge Bottom of structure set at 200+1’ Dubuque Street at 100+1’ Stormwater conveyance Snow storage intrusion Focus Areas: Dubuque @ Foster Dubuque @ Taft Dubuque @ Ridge Dubuque @ Mayflower Dubuque @ Kimball Dubuque @ Park Park Road Bridge Park Road Urban section, no median 35 mph speed limit Path/sidewalk both sides Reduced footprint Dubuque near Foster Maintain multi-use path/sidewalk on both sides 10-foot/6-foot Maintain current 35 mph speed limit 12-foot lanes / 1.5-foot curb and gutter Transitions from using no median to having a median Median transition 35 mph speed limit Realigned Taft intersection Path/sidewalk both sides of Dubuque Reduced footprint Reduced wall heights Changes to park impacts I can break this graphic into separate graphics/slides Dubuque near Taft Speedway Maintain multi-use path and sidewalk on both sides 10’/6’ Maintain current 35 mph speed limit 12-foot lanes / 1.5-foot curb and gutter Keep urban section transition with and without median Urban with median used 35 mph speed limit Relocated Ridge intersection Reduction in footprint Changes to park impacts Still allows Cambus turnaround Dubuque near Ridge Road Keep Cambus turnaround Maintain multi-use path/sidewalk on both sides 10-foot/6-foot Maintain current 35 mph speed limit 12-foot lanes and 1.5-foot curb and gutter Transition zone •Urban sections include varied median •Speed limit 35 mph Multi-use path and sidewalks Dubuque Mayflower to north of Kimball Maintain current Cambus operations Maintain multi-use paths on both sides •Southbound side use 10 foot path throughout corridor •Northbound side use 8-foot paths transition to 6-foot north of Mayflower Un-signalized crosswalk at Mayflower Maintain current 35 mph speed limit 51-foot curb to curb without median / median varies Lower elevation based on design parameters Retaining wall along southbound Urban section Speed limit 25 south of Kimball Multi-use path and sidewalks Reduced footprint along northbound lanes Dubuque from Kimball to Park 12-foot lanes 1.5-foot curb and gutter both sides 51-foot from back of curb to back of curb Use 8-foot parkway both sides Southbound side use 10 foot multi-use path Northbound side use 8-foot sidewalks Urban section applied Includes Dubuque right turn lane Park Road Bridge 5 lanes Speed limit 25 mph south of Kimball Lower elevation – now 100+1’ Retaining wall along southbound Multi-use path and sidewalks Smaller footprint along northbound lanes Is the Southbound right turn lane needed? Southbound causes delays in the morning peak hour LOS F today and in 2040 for southbound and intersection Without right turn lane •Southbound LOS F today and in 2040 – Four minute delays •Intersection LOS F today and in 2040 – Two and a half minute delays With 275-foot right turn lane •Southbound LOS C today and in 2040 – Delays less than 25 seconds •Intersection LOS B today and in 2040 – Delays less than 20 seconds How many lanes does eastbound Park Road need? Two lanes eastbound today Eastbound movement causes delay Current intersection LOS E today / LOS F in 2040 Two eastbound lane scenario: •Intersection improves – LOS C today / LOS E in 2040 •Eastbound movement poor – LOS E today / LOS F in 2040 Three eastbound lane scenario •Intersection improves – LOS B today / LOS C in 2040 •Eastbound improves – LOS C today / LOS D in 2040 How many westbound lanes should Park Road have? Two lanes there today Considered scenario with one westbound lane and two No capacity issues for westbound lanes Cambus stop on bridge Driver safety consideration Two lanes provides capacity for events and incident management Dubuque Street at Park Road: 12-foot lanes 1.5-foot curb and gutter both sides 51-foot from back of curb to back of curb Use 8-foot parkway / 10 foot multi-use path / 8-foot sidewalks Add right turn lane to southbound •Improve level of service •Turn lane does not shift roadway to the east •Considerable expense to add at a later date Maintain the existing lane configuration northbound Partial Through Arch bridge Five lane bridge 3 lanes eastbound 2 west Multiple bike/ped crossings Trail underpass on west side 25 mph Need five lane bridge too Park Road Bridge Park Road Bridge Park Road Bridge Five 12-foot lanes on bridge •Eastbound – dual left turn lanes and one right turn lane •Westbound – two lanes Warranted by existing traffic Arch bridge cannot be widened at a later date Allows Cambus to operate as it does today Provides capacity for events and incident management 5 lane and 3 lane sections 8-foot and 6-foot sidewalks Minimal change to footprint Maintains City Park and Hancher access/egress On Park Road from bridge to Lower City Park •Sidewalks transition for 10-foot at bridge to 8 or 6-foot •Five 12-foot lanes drop outside lanes at Lower City Park From Lower City Park to Riverside •Three lane section – 12-foot center turn lane / 11-foot travel lanes •Use 1.5-foot curb and gutter •Sidewalks – 8-foot along eastbound lanes / 6-foot along westbound •Benefits event traffic at Hancher and City Park •Benefits daily traffic including new Hancher loading docks Complete conceptual design phase Submit Concept Statement to DOT Subject to DOT approval Develop aesthetics and landscape concepts Begin preliminary and final design Continued stakeholder coordination