Yakima Transit

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Yakima Transit Refuse AVL

• Client, Server and Web Applications
• Tom E. Sellsted
• Supervising Senior Analyst (GIS geek)
• Information Services Division
• tsellste_at_ci.yakima.wa.us

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Yakima Transit Statistics

• Population of 80,000
• 9 fixed routes running 6am to 7pm (not Sunday)
• 2005 Budget of 4.4M
• Over 1 million passengers in 2004
• 309 Service Days
• Expanding service to other local cities

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Why TransitAVL?

• Dispatching Tool
• Show current bus positions on route
• Calculate estimated arrival times
• Share information with riders
• Measure Yakima Transit performance
• Leverage Yakimas other AVL/GIS/Web knowledge

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TransitAVL Hardware

• Sierra Wireless MP750 Modems
• Cost 950/unit 40/per month (AYCE-80)
• Integrated Trimble GPS using TAIP
• Consistent position messaging
• Panic Switch
• No session stealing as with CDPD
• Some latency

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Bus Modem picture
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Bus Antenna Picture
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GPS Characteristics

• Reporting Interval 10 seconds 12 meters
• Configurable from TransitAVL server
• Generally accurate to 20 feet
• Regionalized Selective Availability
• Good GPRS coverage

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TransitAVL Rules

• Simple, Easy to follow
• Buses must be assigned to routes
• Any number of buses assigned to route
• Route lines must follow driven path
• GIS line direction must follow driven path
• Times used between stops are from bus book

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Building Routes in GIS

• Leverage Existing GIS Data
• Use actual AVL data
• Generalize in GIS
• Add/Update attributes
• Stop Names
• Time to travel
• Sequence each segment

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Bus traveling west on Tieton Dr
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Position Report Accuracy
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Time, Speed Delay
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Bus Route 5 Single Segment
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Calculating Arrival Times

• Buses assigned to specific routes
• Recalculated with every new position report
• Times recalculated for major stop points
• Use position to select route segment
• Interpolation/percentage traveled segment
• Add interpolated time to other road segments by
  sequence number

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Travel Arrival Times
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TransitAVL Server

• Basic GIS Application
• Receives all position reports
• Calculates/estimates arrival times
• Controls bus assignments
• Relays position reports, bus assignments alerts
  to TransitClients and TransitWeb
• Saves position data for later examination
• Update/Add/Delete Buses, Routes, Users

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TransitClient

• Gives supervisors and staff a real-time view
• Receives assignments, bus positions and alerts
  from TransitAVL server
• Calculates/estimates arrival times

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General Features

• Toggle bus routes
• Turns off route line
• Only shows buses for displayed routes
• User defined zoom areas
• Bus speed and heading information

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Overview Map
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Single Route
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Hover over Bus
É
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Hover over Stop
É
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Hover over Multiple
É
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Zoom Info windows
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TransitWeb - iBus

• Many of the same features as TransitClient
• TransitWeb receives position reports
• Works on most browsers (PC, mac, Unix)
• Cookies save your settings
• Map extent, map size, address, my stop, routes
• Automatic refresh is configurable
• Refreshes only times and positions
• Uses JPG and GIF images

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Basic Map
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One Route
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Hover Bus
É
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Hover Stop
É
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Multiple Routes 1
É
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My Stop
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Address
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AVL Data

• Transit Analysis
• Rider Queries
• Route Timing
• Performance
• General Analysis
• Travel Speed Study
• GPRS Signal Quality

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Over Speed Limit Analysis
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GPRS Signal Quality
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Travel Speed Study
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Solid Waste AVL

• ArcMap AVL Server Connection
• Mapping Delay
• Showing Excessive Speed
• Route Planning

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As driven 30.8 miles - 108
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Optimal Route 17.4 miles 38min
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Questions?Tom E. SellstedCity of Yakima,
Washingtonemailtsellste_at_ci.yakima.wa.ushttp//w
ww.ci.yakima.wa.us/gis