a picture is worth a thousand words: telling a better ...€¦ · a picture is worth a thousand...
TRANSCRIPT
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A picture is worth a thousand words: Telling a better story with data visualizationsParveen SaranaData Scientist, Bus Speed & Reliability
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TransLink
Regional Transportation system of • 23 Municipalities• 1,800 km2
CMBC• 153 Conventional Bus routes• 70 Community Shuttles
2018 437.4M Boardings↑ 8.0% Bus Ridership
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Bus Speed & Reliability ProgramGoals
Improve customer experience and cost-effectiveness through faster, more reliable bus service.
Two-person operation• Project Manager• Data Scientist
$16 million budget for four years
3
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Framing the Analysis Process
1 2 3 4 5Questions Collection Exploration Conclusions Communication
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Framing the Analysis Process
1 2 3 4 5Questions Collection Exploration Conclusions Communication
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Questions
What is the story you are trying to tell?
• Goal• Audience• Simplify
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Discussion with municipalities on transit priority over the Second Narrows Bridge.
• Once onto the Second Narrows bridge, speeds are relatively fast.• Loading onto the bridge results in relative slow speeds and increased travel time.
Route Stop-to-Stop Less than Stop
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QuestionsMETRICS CORRIDOR LINE SEGMENT BUS STOP < BUS STOP
Speed ✓ ✓ ✓
Travel Time ✓ ✓ ✓
Reliability ✓ ✓
Ridership ✓ ✓ ✓
Delay or Person Hours of Delay
✓ ✓
Bus Bunching or Gapping ✓ ✓
On Time Performance ✓ ✓
Com
ing
Soo
n
Manual Dashboard
What is the story you are trying to tell?
• Goal• Audience• Simplify
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CollectionData Source Prepare Adhoc Analysis Publish
Interactive Visualizations &
Project MonitoringTableau Server
Presentations/Reports
Database
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Exploration
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Conclusions & Communication
05:45 06:15 06:45 07:15 07:45 08:15 08:45 09:15 09:45 10:15 10:45 11:15 11:45 12:15 12:45 13:15 13:45 14:15 14:45 15:15 15:45 16:15 16:45 17:15 17:45 18:15 18:45 19:15 19:45 20:15 20:45 21:15 21:45 22:15 22:45 23:15 23:45 00:15
0
100
200
300
Avg. Avg RT
101.5
Average Excess Travel Time
Nul05:30 05:45 06:00 06:15 06:30 06:45 07:00 07:15 07:30 07:45 08:00 08:15 08:30 08:45 09:00 09:15 09:30 09:45 10:00 10:15 10:30 10:45 11:00 11:15 11:30 11:45 12:00 12:15 12:30 12:45 13:00 13:15 13:30 13:45 14:00 14:15 14:30 14:45 15:00 15:15 15:30 15:45 16:00 16:15 16:30 16:45 17:00 17:15 17:30 17:45 18:00 18:15 18:30 18:45 19:00 19:15 19:30 19:45 20:00 20:15 20:30 20:45 21:00 21:15 21:30 21:45 22:00 22:15 22:30 22:45 23:00 23:15 23:30 23:45 00:00 00:15 00:30 00:45
0
100
200
300
400
500
600
Valu
0
100
200
300
400
500
600
Avg. Avg RT
170.6
Travel Time by Percentiles | EB E HASTINGS ST AT COMMERCIAL DR - EB E HASTINGS ST AT NANAIMO ST
05:00 05:15 05:30 05:45 06:00 06:15 06:30 06:45 07:00 07:15 07:30 07:45 08:00 08:15 08:30 08:45 09:00 09:15 09:30 09:45 10:00 10:15 10:30 10:45 11:00 11:15 11:30 11:45 12:00 12:15 12:30 12:45 13:00 13:15 13:30 13:45 14:00 14:15 14:30 14:45 15:00 15:15 15:30 15:45 16:00 16:15 16:30 16:45 17:00 17:15 17:30 17:45 18:00 18:15 18:30 18:45 19:00 19:15 19:30 19:45 20:00 20:15 20:30 20:45 21:00 21:15 21:30 21:45 22:00 22:15 22:30 22:45 23:00 23:15 23:30 23:45 00:00 00:15 00:30 00:45
Null Null
2 EB W HASTINGS ST AT GRANVILL..
3 EB W HASTINGS ST AT CAMBIE ST
4 EB E HASTINGS ST AT MAIN ST--
5 EB E HASTINGS ST AT COMMERCI..
6 EB E HASTINGS ST AT NANAIMO ST
7 EB E HASTINGS ST AT RENFREW ..
8 KOOTENAY LOOP BAY 8
11 EB HASTINGS ST AT GILMORE AVE
12 EB HASTINGS ST AT WILLINGDON ..
14 EB HASTINGS ST AT HYTHE AVE
15 EB HASTINGS ST AT HOLDOM AVE
16 EB HASTINGS ST AT KENSINGTON..
17 EB HASTINGS ST AT DUTHIE AVE
095 | EAST | MF | NoneAverage Speed by Time of Day and Stop Location
Route095
Day TypeMF
0.00 94.29
Average Speed without Dwell
START6
END6
SB VICTORIA DR AT E 31 AVE - SB VICTORIA DR AT E 33 AVEHourDirection
EAST
095 | EAST | MF
0 to 23
Minimum 25th Average 75th Maximum
EB E HASTINGS ST AT COMMERCI.. EB E HASTINGS ST AT NANAIMO .. 6
Grand Total
394.0183.0172.3150.086.0
394.0183.0172.3150.086.0
Destination StopEB E HASTINGS ST AT NANAIMO ST
Origin StopEB E HASTINGS ST AT COMMERCIAL DR
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Burnaby and Vancouver are considering extending transit priority lanes across Hastings.
Data
HOV Lanes seen along Hastingsthrough Burnaby offer littlebenefit to transit travel timecompared to hours withoutparking restrictions.
Recommendation
1. ↑ Hours of Parking Restrictions2. Extend hours of Priority3. Convert HOV Bus Only
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Monitor Specific Projects:Extending Transit Priority Lane hours across Vancouver
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2018 2019
Confirming Operator Comments“We have received a number of reports from customers and bus operators regarding traffic delay at the left turn from NB Scott Road to WB 84th Avenue”
• BSR Program funded a Left-Turn Signal at this intersection• Saving almost 2 minutes during the worst time of day, an average of 45-75 seconds on other trips.
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1. Identify and Prioritize Metrics2. Flexible analysis structure and tools3. Develop Partnerships
Data InformationStory
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REFERENCE
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Dashboard ViewsRoute
All Routes in region (ex. North Shore)
Route
Average schedule adherence and
speed of all Routes in region
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Hover over a route to see Route level Run Time Values
Route
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Filters
12
3
Trip - Segments
Dashboard Views
Trip - Segments
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4
Trip - Segments
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Speed Map
What is ShownAverage transit speed between bus stops.
How to ReadColour indicates average transit speed between bus stops.
• Green: Relatively fast/free-flowing.• Red: Relatively slow, area of
potential
NoteOnly shows average speed. Does not indicate potential reliability issues (variation of speed).
0 80
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Travel Time
What is ShownSum of average travel time (y-axis) of chosen segments across 15-minute increments of the day (x-axis).
How to Read• Light Blue – Possible Time Savings:
Average observed travel time for each trip attributable to various forms of delay, slow speeds in traffic, etc.
• Gray – Baseline: Average minimum travel time throughout the day. This is used as a proxy to estimate free-flow traffic.
NoteOnly shows average travel time.Does not indicate potential reliability issues (variation of travel time).
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Travel Time by Percentile Group
What is ShownTravel time (y-axis) of chosen segments across 15-minute increments of the day (x-axis) by 25th, 50th (median), 75th and100th (maximum).
How to ReadEach percentile group represents travel time of ¼ of trips through a specific stop segment.Average travel time is shown by
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Heat Map
What is ShownAverage speed(km/h) across all stops along a route (y-axis) across 15-minute increments of the day (x-axis).
How to ReadColour indicates average speed between bus stops. A white block indicates lack of data.• Horizontal pattern: Speed influenced by
location.• Vertical pattern: Speed influenced by
time of day.
NoteOnly shows average speed. Does not indicate potential reliability issues (variation of speed).