DMS Travel Time Evaluation-Final Report
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DDMMSS TTrraavveell TTiimmee PPiilloott PPrroojjeecctt EEvvaalluuaattiioonn Final Report Prepared by: April, 2011 091025054 TABLE OF CONTENTS EXECUTIVE SUMMARY ............................................................................................................................. 1 1. INTRODUCTION .................................................................................................................................. 5 1.1 Travel Time Pilot Program Background ................................................................................. 5 1.2 Pilot Program Initiation ............................................................................................................ 5 1.3 DMS Travel Time Pilot Program Timeframe ......................................................................... 7 1.4 Project Evaluation Overview and Goals .................................................................................. 7 1.5 Focus and Organization of This Report ................................................................................... 8 2. LITERATURE REVIEW ...................................................................................................................... 10 2.1 Atlanta, Georgia ....................................................................................................................... 10 2.2 Chicago, Illinois ........................................................................................................................ 10 2.3 Houston, Texas ......................................................................................................................... 11 2.4 Los Angeles, California ........................................................................................................... 11 2.5 Portland, Oregon ..................................................................................................................... 12 2.6 Salt Lake City, Utah ................................................................................................................ 12 2.7 San Antonio, Texas .................................................................................................................. 12 2.8 San Francisco Bay Area, California ....................................................................................... 13 2.9 Summary of Findings .............................................................................................................. 14 3. EVALUATION STRATEGY ................................................................................................................. 15 3.1 Research and Evaluation Hypothesis ..................................................................................... 15 3.2 Year 1 Initial Launch and Mid-Year Adjustment ................................................................ 16 3.3 Factors Influencing the Evaluation ........................................................................................ 16 3.4 Impacts to Freeway Speeds and Mobility .............................................................................. 17 3.4.1 Define Analysis Zones and Establish Baseline Speeds ................................................... 17 3.4.2 Analyze Freeway Speeds with Active Travel Time Message Displays ............................ 20 3.5 Assess Impacts of Travel Times on Crash Rates near DMS ................................................ 21 3.6 Public Perception of Travel Time Messages .......................................................................... 22 3.6.1 On-Line Surveys .............................................................................................................. 23 3.6.2 Phone Interviews ............................................................................................................. 25 3.6.3 Customer Feedback Reporting ........................................................................................ 25 3.7 Impact of Travel Time Outreach Activities on 511 and AZ511.gov Usage ........................ 25 3.8 Travel Time Validation ........................................................................................................... 25 4. EVALUATION RESULTS AND SUMMARY ......................................................................................... 27 4.1 Crash Analysis Assessment and Summary ............................................................................ 27 4.2 Speed/Mobility Impact Assessment and Summary............................................................... 28 4.3 User Feedback .......................................................................................................................... 29 4.3.1 Phone Survey Results and Summary ............................................................................... 29 4.3.2 User Feedback from Web Survey .................................................................................... 31 4.4 Travel Time Validation Runs ................................................................................................. 36 4.5 511 Usage Comparison ............................................................................................................ 37 4.6 Summary of Findings .............................................................................................................. 37 091025054 ADOT DMS Travel Time Pilot Project Evaluation Final Report i April 2011 5. SYSTEMS ENGINEERING ANALYSIS ................................................................................................ 39 5.1 Systems Engineering Overview .............................................................................................. 39 5.1.1 Systems Engineering Goals and Objectives of this Project ............................................ 39 5.1.2 Interfacing with the Regional ITS Architecture .............................................................. 40 5.2 Feasibility Study ....................................................................................................................... 41 5.2.1 ITS Applications Supported ............................................................................................ 41 5.2.2 Technical Feasibility ....................................................................................................... 42 5.2.3 Financial Feasibility ....................................................................................................... 42 5.2.4 Institutional Feasibility ................................................................................................... 43 5.3 Concept of Operations ............................................................................................................. 43 5.3.1 Concept Development ..................................................................................................... 43 5.3.2 Roles and Responsibilities .............................................................................................. 44 5.3.3 Operational Concept ....................................................................................................... 44 5.3.4 Operational Guidelines ................................................................................................... 46 5.4 System Requirements and Design .......................................................................................... 48 5.4.1 System Requirements ...................................................................................................... 48 5.4.2 System Design ................................................................................................................. 49 5.5 System Implementation ........................................................................................................... 49 5.6 System Test and Verification .................................................................................................. 50 5.6.1 Subsystem Verification and Validation ........................................................................... 50 5.6.2 Program Evaluation ........................................................................................................ 50 5.7 System Operations, Maintenance and Lifecycle ................................................................... 51 6. EXPANSION PLAN ............................................................................................................................. 52 6.1 2002 Estimate of Travel Time Pilot Program Costs ............................................................. 52 6.2 Costs of Travel Time Program ............................................................................................... 53 6.2.1 Travel Time Algorithm Development/Support ................................................................ 53 6.2.2 Incremental Week Day Power Costs Associated With DMS Posting Travel Time During Peak Hours ........................................................................................................................................ 54 6.2.3 Maintenance/Upgrade Costs for DMS Used to Post Travel Times ................................ 55 6.2.4 Hardware, Software, Licensing Costs Used to Support the Entire State ITS Program .. 56 6.2.5 TOC Facility Costs Used to Support the Entire State ITS Program ............................... 56 6.2.6 TOC Staff Costs Used to Support the Entire State ITS Program .................................... 57 6.2.7 Lifecycle Costs ...............................................................................................................