Highways. Preserving the Lost Art of Geometric Design: Tools, Techniques, and Talent Jan. 13,

Transcription

1 1 2 Breakout Group Setup 6 diverse groups Each group Easel with flip chart and pens ~3 handouts per group 1

2 Preserving the Lost Art of Geometric Design: Tools, Techniques, and Talent Jan. 22, 2012 Outline 3 How do we apply the Art? Overview of the Project Corridor Interactive Discussion Closing Breakout Group Setup Preserving the Lost Art of Geometric Design: Tools, Techniques, and Talent Jan. 22, 2012 How do we apply the Art? Understand the fundamentals Understand project context and various user needs Stay current on publications, methodologies, tools Apply tools appropriately Sketches to CAD CMA to simulation Consider performance-based vs. nominal outcomes Engaged the public, users, and stakeholders to develop the solution 4 2

3 5 Pacific Avenue/SR 510 Thurston County, WA Preserving the Lost Art of Geometric Design: Tools, Techniques, and Talent Jan. 22,

4 Project Background Thurston County, WA State Capital - Olympia Joint Base - Ft Lewis and AFB McChord Numerous Native American Communities 7 Case Study SR 510 Rural 2 lanes 8,000 to 10,000 AADT ~11 ft lanes with 4 to 8ft shoulders Intermittent 3 lane sections (TWLTL 13 to 14 ft) Posted Speed Limit 50 mph 8 4

5 2 Lane Cross Section 9 var var Case Study Pacific Avenue SE Transitional (Suburban) 15,000 AADT 11-foot lanes Residential and commercial drwys Posted Speed Limit 40 mph Marked bike lanes Transit corridor 10 5

6 5T Cross Section TWLTL Case Study Pacific Avenue SE in Lacey, WA Urban One way couplet (bookended by roundabouts) Two lanes in each direction Commercial driveways 12 (The urban portion of this highway will not be included in case study as assessment of a arterial was conducted at the 2012 TRB Workshop. Streets and Intersections ) 6

7 13 Triggers for Cross Section Changes Traffic Volumes Access Control/Access Management Safety Issues/Risk Land Use/Development Complete Streets Initiatives Consequences of Unbalanced Cross Sections 14 Over-design Under-design Increase in Speeds Modal choices Limited Access Density Safety Risks 7

8 15 Solutions for Transitions Designing the Roadway for Realistic Conditions and All Users Flexibility in Design Repurposing between the Existing Right of Way Complete Streets Road Diets Multi-modal Enhancements 16 2 Lane Divided Cross Section Left Turn Lane Right Turn Lane 8

9 Preserving the Lost Art of Geometric Design: Tools, Techniques, and Talent Jan. 22, Lane Divided Cross Section TWLTL 9

10 19 20 Narrow lanes; add bike lanes, median, trees, texture 10

11 21 Narrow lanes; add bike lanes, median, trees, texture 22 Reinventing the roadway: Transform a 5-lane commercial strip to 11

12 23 a safer road for everyone 24 Resources AASHTO A Guide to Flexibility in Highway Design (2004) FHWA Flexibility in Highway Design AASHTO s Highway Safety Manual NCHRP Synthesis Report Trade-Off Considerations in Highway Geometric Design 12

13 25 Interactive Discussion Use aerials and data (handouts) for the discussion Discuss distinct topic areas Road cross section and geometrics Safety and Risk Access Management Vulnerable Road Users Transit 26 Interactive Discussion Open ended questions What is the art associated with these topic areas? What tools, techniques, and talent are most useful in these topic areas? What key research, tools, guidance, methodologies, or syntheses would be helpful in the future? What TRB committees could collaborate to help advance highways? 13

14 27 Overview Interactive Discussion Approximately 50 minutes of small group discussion Discuss all topics (even consider role play) Document discussion (note taker?) Approximately 40 minutes of full group discussion Feedback from each group (presenter?) Overall discussion 28 Closing What have we heard? What are the TRB committee liaison and inter-committee support opportunities? What research do we need to support the future? 14