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Mineral Avenue Corridor Assessment

This presentation outlines the background, methodology, study process, and implementation strategy of the Mineral Avenue Corridor Assessment in Littleton, Colorado. It highlights the results of the assessment and the proposed solutions for improving traffic flow, reducing accidents, and enhancing accessibility.

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Mineral Avenue Corridor Assessment

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  1. Mineral Avenue Corridor Assessment ITE Western District Annual Meeting Monterey, CA June 26, 2019

  2. Presentation Outline • Project Background • Assessment Methodology • Study Process • Implementation Strategy • Results

  3. Background Littleton, Colorado • South Denver Suburb • Population 44,000 • North-South Barriers • US 85 • South Platte River • Railroad/Light Rail Mineral Avenue • East-West Regional Connector • 6-Lane Arterial • 28,000 ADT Study Area • ½ Mile • West End: Platte Canyon Road (SH)Traffic Signal • East End: Polo Ridge Drive Ped Signal • Mineral Trail along North Side Study Area Mineral Avenue

  4. Community 7 Neighborhoods Engaged: • Meadowbrook • Polo Reserve-Polo Ridge Farms • Polo Reserve-The Sanctuary • Overlook at Platte Valley • Pinnacle at Mountain Gate • The Overlook Plateau • Outlook (The Meadows at Platte Valley) • Corridor Study Limits • Mineral Ave Regional Trail • City Limits

  5. Methodology • City Pilot Project • Resident Engagement • Community Meetings • Cooperative/Iterative Process

  6. Process • Community Involvement • Information Gathering • Issues Assessment • Preliminary Solutions • Implementation Strategy • Recommendations to City Council • Implementation

  7. Community Involvement • Project Webpage on City Website • Neighborhood Meetings • Development of Mission, Goals & Users • Identification of Issues & Concerns • Feedback on Data, Assessment, Solutions & Implementation Strategy

  8. Info & Data • Past Studies • Physical Environment & Surrounding Land Uses • Vehicular Volumes • Pedestrian/Bicycle Activity • Vehicle Speeds • Vehicle Intersection Delays • Corridor Accident History • Police Enforcement History • Transit& School Buses

  9. Assessment Resident Perceived Issues Identified: • Traffic Growth for Commuting & Commercial Land Use • Increased Number & Severity of Accidents • Speed of Traffic Creating Unsafe Conditions • Delay Accessing Adjacent Neighborhoods • Review with residents to verify issues being addressed

  10. Preliminary Solutions • Roadway Changes • Intersection Modifications • Side Street Improvements • Access Revisions • Traffic Control Considerations • Review with residents to identify solutions to move forward

  11. Implementation Strategy • Concept Design • Phasing Plan • Cost Estimates • Review with residents to develop an agreed upon strategy

  12. Designs • Mineral Avenue Modifications • Platte Canyon Road Intersections • Side Street Approach Improvements

  13. Mineral Avenue Modifications Road Diet Aspects & More – Completed • Conversion to Right Turn Accel/Decel Lane • Lane Width Narrowing • Center Median Widening • Speed Limit Reduction • Specified U-turn Locations • Deter Queues from Blocking Intersections

  14. BEFORE BEFORE Widened Center Median Widened Center Median Right Turn Decel Lane Right Turn Accel Lane Narrowed Lanes Narrowed Lanes AFTER AFTER

  15. Platte Canyon Road Movements • Mineral Avenue Signalized Intersection • Dual NB & SB Left Turn Lanes • Traffic Signal Modifications • Channelized NB Right Turn Lane • Trail Safety Improvements • Mineral Drive Side Street Stop Controlled T-Intersection • Full Movement Access • High Violation Rate N Mineral Ave Platte Canyon Rd Mineral Dr

  16. N Mineral Ave Platte Canyon Rd Mineral Dr

  17. N Mineral Ave Platte Canyon Rd Dual Left Turn Lanes Mineral Dr

  18. N Mineral Ave Platte Canyon Rd Dual Left Turn Lanes Mineral Dr

  19. N Mineral Ave Platte Canyon Rd Mineral Dr Signal Modifications

  20. N Mineral Ave Platte Canyon Rd Mineral Dr Channelization Island

  21. N Mineral Ave Platte Canyon Rd Mineral Dr Full Movement

  22. N Mineral Ave Platte Canyon Rd Channelization Islands Mineral Dr

  23. N Channelization Islands Channelization Island Mineral Ave Platte Canyon Rd Mineral Dr Dual Left Turn Lanes Full Movement Signal Modifications

  24. Side Street Improvements Provisional Revisions – Completed • Crosswalk Striping • Ped Crossing Blank Out Signs • Trail Signage Polo Ridge Dr Wolff St Dusk Ct Mineral Trail Mineral Avenue

  25. Provisional Dusk Court Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  26. Side Street Improvements Ultimate Alterations • Curb Extensions • Raised Crosswalk • Additional Landscaping Polo Ridge Dr Wolff St Dusk Ct Mineral Trail Mineral Avenue

  27. ULTIMATE Dusk Court Curb Extensions Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  28. ULTIMATE Dusk Court Mineral Avenue Raised Crosswalk CROSSING SLOW DOWN CROSSING SLOW DOWN

  29. ULTIMATE Dusk Court Mineral Avenue Landscaping CROSSING SLOW DOWN CROSSING SLOW DOWN

  30. ULTIMATE Dusk Court Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  31. ULTIMATE Dusk Court Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  32. ULTIMATE Dusk Court Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  33. ULTIMATE Dusk Court Mineral Avenue CROSSING SLOW DOWN CROSSING SLOW DOWN

  34. Phasing Plan • Phase 1 • Side Street Provisional Improvements – Crosswalks, Trail Signage & Blank Out Signs • Mineral Avenue Lane Reassignments • Phase 2 • Platte Canyon Road/Mineral Avenue Signalized Intersection • Phase 3 • Platte Canyon Road/Mineral Drive Full Movement Intersection • Side Street Ultimate Improvements – Raised Crosswalks, Curb Extensions & Landscaping

  35. Cost Estimating

  36. Funding • Public Works Operating Budget • Open Space Funds • Capital Improvement Project Program • State & Federal Grant Programs

  37. Project Status To Date • Community Engaged & Pleased with Process • City Council Approved • Phase Implementation • 1A & B Complete • 2A: Design 2019; Construction 2020 • 3A: Design 2019; Construction 2020 • 3B: TBD

  38. Resident Feedback • Improved Operations Due to U-turn Relocation • Reduced Speeds Due to Lane Narrowing, RT Accel/Decel & Lower Speed Limit • Decrease Delays Due to Two-stage Left Turn Option • Corridor Less Intimidating to Access

  39. After Data Indications • Volume Increase by <5% • Slight Growth in Traffic at Intersections • Decrease in Corridor Traffic Speeds by ~5 mph • Comparable Delays • Fewer Reported Accidents & Lower Incident of Injury Accidents

  40. Project Takeaways • Corridor Functioning Safer for Bicyclists & Peds • Corridor More Accessible for Side Streets • Minimal Impact to Vehicle Operations • Demonstrated Benefits of Resident Involvement & Good Communication • Safety Improvements with Minimal Impacts to Operations & Congestion • City Applying Process to Other Projects

  41. Comments or Questions

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