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PeMS Performance Measurement System S203: The Caltrans Performance Measurement System (PeMS) An Introduction to PeMS and a Demonstration of its Multimodal Tools Presented By: Ellison Alegre, San Diego Association of Governments Jane Berner, Caltrans APA’s 2012 National Planning Conference
Transcript of PeMS - American Planning...
PeMS Performance
Measurement
System
S203: The Caltrans Performance Measurement System (PeMS)
An Introduction to PeMS and
a Demonstration of its Multimodal Tools
Presented By:
Ellison Alegre, San Diego Association of Governments
Jane Berner, Caltrans
APA’s 2012 National Planning Conference
PeMS Performance
Measurement
System
About Us
Jane Berner
– Senior Transportation Planner at Caltrans responsible for PeMS user support and application development activities.
– Contact information: (916) 654-2843, [email protected]
Ellison Alegre
– Associate Regional Planner at SANDAG
– Project Manager in Mobility ITS Division
– Responsible for on-going transportation performance monitoring activities in San Diego region
– Contact information: (619) 699-0729, [email protected]
APA National Conference
April 14, 2012
PeMS Performance
Measurement
System
Learning Objectives
Learn the basics about PeMS
Understand what data are kept in PeMS
Learn how to access the data you want
Know about the newer, multimodal aspects of
PeMS that are under development
APA National Conference
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PeMS Performance
Measurement
System
A website that anyone can access: http://pems.dot.ca.gov
A centralized traffic data warehouse
– Near real-time and historical data
– Mainly collected through automated detection
Over 34,000 detectors deployed on urban freeways throughout California
A data visualization and analysis tool
A system that enables system monitoring and evaluation
What is PeMS?
APA National Conference
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PeMS Performance
Measurement
System
Development began in late 1990’s
Caltrans was deploying many real-time, automated detectors to provide data to the Transportation Management Centers (TMCs)
Recognized the need to store all of the data in a centralized location
Partnership between Caltrans and the University of California, Berkeley
PeMS put into production at Caltrans a few years ago
PeMS History
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PeMS Performance
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System
Measures the number of vehicles that pass over it
(volume/flow)
Measures occupancy (the amount of time the detector is
“on,” or sensing a vehicle)
Sometimes measures speed
Reports data on a cycle to a controller every 30 seconds
What does a detector do?
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PeMS Performance
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System
Types of Detectors
http://ops.fhwa.dot.gov/freewaymgmt/publications/frwy_mgmt_handbook/chapter15_01.htm
Loop detectors in the road
A magnetometer
Side-fire radar
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PeMS Performance
Measurement
System
How is PeMS used?
•Provides data for the Department’s
annual congestion report, the Mobility
Performance Report (formerly
HICOMP)
•Monitor detector health status
•Perform pre- and post- lane closure
analysis
•Evaluate the performance of Managed
Lanes (HOV, HOT)
•Produce Corridor System
Management Plans and Transportation
Concept Reports
•Traffic Studies and Project Planning
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PeMS Performance
Measurement
System
More than data from real-time, automated detectors
Traffic Census data
– Non-real-time volume data from all over the state
Weigh-in-Motion (WIM) and vehicle classification data
– Approximately 100 locations
Electronic Toll Collection (ETC) tag data
– Provides travel times in the San Francisco Bay Area
Incident data
– Real-time and archived California Highway Patrol data
Lane Closure System
– Real-time and archived lane closure information
Data in PeMS
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PeMS Performance
Measurement
System
Through a partnership with SANDAG, two new modules are begin developed in PeMS
–Arterial PeMS (A-PeMS)
–Transit PeMS (T-PeMS)
Original idea was that PeMS would not be limited to freeway data
For planning and operations purposes, want to know how all facilities and modes are performing
New Data Sets in PeMS
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PeMS Performance
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System
Recent PeMS Enhancements
Arterial PeMS (A-PeMS)
– Pilot on Telegraph Canyon Road in Chula Vista, CA
– Deployed magnetometers along corridor
Transit PeMS (T-PeMS)
– Pilot with San Diego Metropolitan Transit System (MTS) and North County Transit District
– Route and Schedule information for all buses
– Automatic Vehicle Location (AVL) and Automatic Passenger Count (APC) data
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PeMS Performance
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PeMS Demonstrations
APA National Conference
April 14, 2012
PeMS Performance
Measurement
System
Accessing PeMS on the Internet
If you don’t have an
account, you can apply
for one. It is usually
instantaneous but can
take up to 2 business
days.
Login with your
username and
password
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PeMS Performance
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PeMS Homepage
Clicking on the PeMS
logo always takes you
back to this homepage
Return to your homepage (specify
under your account settings by
clicking on your username)
Jump to Maps – Real-Time for
current conditions, Performance
for data visualization, and
Inventory to find detector
locations
Dashboards for high-level
information; click “more”
links for additional details
Click on your username to view
and change your account
settings
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PeMS Performance
Measurement
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More Homepage Navigational Tips
System-wide help.
General topics not
specific to a single
page (e.g.,
Calculations)
Jump to a District Dashboard, or to county,
city or freeway-specific pages
Important
announcements
Report Finder – a short cut for
finding traffic data
Report tabs
APA National Conference
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PeMS Performance
Measurement
System
Methods for finding data in PeMS
Through map navigation
– Inventory Map to find locations where data is available
–Real-Time Map for current traffic conditions
– Performance Map to visualize information like bottleneck locations and detector health
By searching under “Facilities & Devices”
By using the “Report Finder”
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PeMS Performance
Measurement
System
Finding Data for a Particular Vehicle Detector Station (VDS) on a Freeway
• From the PeMS
Homepage, click on
the “Inventory” link
under the California
map image.
• Once on the
Inventory Map, re-
center the map to
District 7 (L.A.), and
zoom in so that the
Mainline VDS icons
(in red) are visible.
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PeMS Performance
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Select a VDS to Analyze • Zoom in to the I-10 freeway and click on the Mainline VDS icon just east of Bundy
Drive. Clicking on the icon will bring up a pop-up window with details about this
detector station. Click on Aggregates to go to data for this station.
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PeMS Performance
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View data for this VDS • Clicking on Aggregates from the Inventory Map pop-up window takes you to the
Performance > Aggregates > Time Series report, where data like flow and speed can be
viewed.
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PeMS Performance
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Data can be Viewed in Table Form
• Besides looking at the data in plot form, you can click on View Table to see it in table
form. The data can also be downloaded as text or into a spreadsheet.
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PeMS Performance
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Viewing Data for a Section of Freeway, rather than a Single Point
• To view data for a
section of freeway,
return to the PeMS
Homepage and Jump
to District 7.
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PeMS Performance
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See which Freeways have Detection
• From the District 7
homepage, click on
Facilities & Devices
> Freeways.
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PeMS Performance
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Choose I-110 North from the List of Freeways
• Click on the #VDSs column of the I110-N row to view the detector stations on this
freeway.
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PeMS Performance
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Viewing data for I-110 N
• Choose the Performance > Spatial Analysis > Time of Day Contours report.
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PeMS Performance
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Time of Day Contours • This report shows a speed contour plot of the I-110 N freeway over a select date range.
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PeMS Performance
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Another Fun Visualization Tool is the Animation Report
• Select Performance > Modeling > Animation to see a unique visualization of flow,
speed, bottlenecks, and incidents on a freeway segment.
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Animation
• Click on Reload
Animation once
you have selected
the date and time
range you want.
• Once reloaded,
click on the play
arrow at the
bottom of the
page.
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PeMS Performance
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PeMS Route Demonstration: Average Freeway Travel Time
• Select Facilities & Devices > Routes > Listing to select a route. Then select
Performance > Travel Time > Departure Time Series to see a report of travel times for the
chosen freeway corridor over a given time period.
APA National Conference
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Transit PeMS – Location of Bus Stops • On the Inventory Map, select Transit Stops.
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PeMS Performance
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Transit PeMS (T-PeMS) Demonstration: Hourly On-Time Performance for a Week
• Select Facilities & Devices > Transit Agencies and select MTS. Then select Performance
> Aggregates > Time Series to see an hourly report of system-wide on-time performance for
a given week.
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Arterial PeMS Pilot Location in Chula Vista
• On the Inventory Map, view Arterials – Detectors.
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PeMS Performance
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Arterial PeMS (A-PeMS) Demonstration: Arterial Travel Time by Time of Day for a Month
• Select Facilities & Devices > Routes > Listing to select an arterial route. Then select
Performance > Travel Time > Time of Day to see a report of average hourly travel time for
the chosen arterial corridor over a given time period.
•.
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Multimodal PeMS Application: Average Monthly Freeway/Arterial Travel Time
• Select Facilities & Devices > Routes > Listing to select an “mixed” route. Then select
Performance > Travel Time > Departure Time Series to see a report of average travel time
during the PM Peak Period for the chosen freeway/arterial corridor over a given time period.
•.
APA National Conference
April 14, 2012
PeMS Performance
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Wrap-Up
Questions?
Comments?
Spend some time exploring PeMS on your own!
Thank you!
APA National Conference
April 14, 2012
