sjcog fhwa reliability cmp workshop presentation spring2016
DESCRIPTION
ÂTRANSCRIPT
Incorporating Reliability into the Congestion Management Process
Training Workshop
May 17, 2016
San Joaquin Council of Governments
Stockton CA
Incorporating Travel-Time Reliability into the CMP3
• Presenters• Steven Gayle, PTP, Senior Consultant, RSG Inc.
• Richard Dowling, P.E., Senior Principal Engineer, Kittelson & Associates, Inc.
• Attendees
Incorporating Travel-Time Reliability into the CMP4
Morning
8:30 Welcome and Introductions
8:45 Background and Workshop outcomes
9:00 Incorporating Reliability in the CMP: Part 1 - Reliability-Related
Goals, Objectives, and Performance Measures
10:00 Break
10:15 Incorporating Reliability in the CMP: Part 2 - Data for reliability
analysis and diagnosing reliability problems
11:45 Lunch
Afternoon
12:30 Feedback opportunity - questions from the morning sessions
12:45 Facilitated discussion on incorporating reliability into broader
planning efforts
1:15 Interactive session: Travel time reliability and planning in the San
Jaoquin region
2:00 Peer presentation: CMP State of the Practice
2:30 Moving forward: Developing an action agenda
3:00 Concluding remarks/adjourn
Incorporating Travel-Time Reliability into the CMP5
We expect that the material and activities developed for this workshop will:
• Introduce the FHWA Primer on Incorporating Reliability in the Congestion Management Process
• Facilitate discussion about reliability and enumerate how SJCOG, Caltrans, and other planning partners might fully integrate reliability into planning efforts
• Discuss the relationship to Performance Based Planning and Programming
Incorporating Travel-Time Reliability into the CMP6
• Background
• Introduction to Travel-Time Reliability
• How to Incorporate Reliability into the CMP
Incorporating Travel-Time Reliability into the CMP8
Timeline of Key Events
FEDERAL LEGISLATION
ISTEA SAFETEA-LU MAP-21 FAST ACT
CONGESTION MANAGEMENT APPROACH
Congestion Management System Congestion Management Process
RELIABILITY RESEARCH
PERFORMANCE BASED PLANNING
1991 2005 2012 2015
CMS CMP
SHRP2 Extended Completed
National Goals Rules
Incorporating Travel-Time Reliability into the CMP9
The Second Strategic Highway Research Program (SHRP 2)
Applied research
Focus on the most-pressing needs of highway system
Capacity
Renewal
Safety
Reliability
Systematic approach to provide tools for improving reliability of travel Defining objectives
Analytical techniques
Design procedures
Institutional approaches
Incorporating Travel-Time Reliability into the CMP10
Federal Legislation - MAP-21
Introduces paradigm of performance-based planning and programming
States and MPOs are expected to select investments to achieve best outcomes for system users
Performance measurement
Target setting
Reporting on outcomes
System reliability is one of seven national goals
Proposed System Performance rule published April 20
Incorporating Travel-Time Reliability into the CMP11
FAST Act (Fixing America’s Surface
Transportation)
• Retains the requirement for the CMP
• Makes no changes in the State and MPO requirements
for performance based planning
• Creates an optional Congestion Management Plan that
focuses on access to employment
Incorporating Travel-Time Reliability into the CMP12
Implementation of Reliability
Congestion Management Process is a natural implementation tool
Familiar process for many regions
Updated periodically
Focused on congestion
Implementing regional goals and objectives
Monitoring
Establishing performance measures
Developing strategies
Evaluating strategies
… but most CMPs focus only on recurring congestion
Incorporating Travel-Time Reliability into the CMP13
Incorporating Reliability into the CMP
Part of Planning for Operations effort
Transportation system management and operations (TSM&O) strategies
A primer to assist states and MPOs with:
Developing regional objectives
Developing performance measures
Analyzing congestion problems and needs
Identifying and assessing strategies
Evaluating strategy effectiveness
Incorporating Travel-Time Reliability into the CMP15
• The MPO Long Range Transportation Plan is foundational.
• The LRTP states MPO priorities for transportation investments through goals and objectives.
• The Transportation Improvement Program (TIP) and Congestion Management Process (CMP) are tools for implementing the LRTP
• The TIP and CMP must reflect the goals and objectives of the LRTP.
Incorporating Travel-Time Reliability into the CMP16
• Goal: What does the MPO intend to achieve over the long term to mitigate congestion and/or improve travel time reliability?
• Reduce peak period freeway congestion through improved operations
• Objectives: More specific statements of proposed accomplishments that are “SMART” [Specific, Measurable, Agreed on, Realistic, Timebound]
• Reduce elapsed time of freeway incident detection to clearance by 15% in the next 5 years
• Performance Measures: What metrics will be used to determine progress on objectives?
• Total incident time averaged over a one year period.
Incorporating Travel-Time Reliability into the CMP17
How is congestion mitigation and reliability improvement enabled
by evolving technology? How is this likely to change by 2020?
2040?
Incorporating Travel-Time Reliability into the CMP18
Forecasting non-recurring congestion
• Do we have adequate tools?
Implementing the CMP: projects, strategies, actions
• Where does congestion mitigation fit among other MPO priorities?
• Where does reliability fit among congestion mitigation priorities?
• Geographic context: regionwide, corridors, subareas,
• Modal context: auto, truck/freight, transit
• Time of day context: peak v. off-peak
Incorporating Travel-Time Reliability into the CMP19
What is travel-time reliability?
Consistent travel times for the same trip
Incorporating Travel-Time Reliability into the CMP20
How is travel-time reliability assessed?
Longitudinal look at continuous data
Expands the single-day review of travel times
Variation in travel time day-to-day, holding all else equal
Same trip (point A to point B)
Same mode (vehicle, transit type)
Same time of day (AM peak, mid-day, PM peak, off-peak)
Same type of day (mid-weekday, shoulder weekday, weekend)
Incorporating Travel-Time Reliability into the CMP21
An example
… and adds the “Reliability Dimension” for day-to-day analysis
Source: Highway Capacity Manual, Chapter 37 – Travel Time Reliability: Supplemental, Exhibit 37-21
Incorporating Travel-Time Reliability into the CMP22
Why is reliability important?
Non-recurring congestion causes greater total delay than recurring congestion
Particularly in less urban areas
Public sentiment
Traveling public
Freight and trucking companies
Constraints on new roadway capacity
Federal legislation
Incorporating Travel-Time Reliability into the CMP23
• What drives the conversation?
• Public expectations
• Business needs
• Reporting of performance measures
Incorporating Travel-Time Reliability into the CMP24
Public Sentiment
Knowledge of technological advances
Experience travel in different regions
Heightened expectations
Dissemination of real-time information
Efficient management of incidents
Opinion polls (1)
63% of Americans feel that nation can no longer build its way out of traffic congestion
71% of drivers would be willing to pay a higher toll fare to save travel time
Incorporating Travel-Time Reliability into the CMP25
4.5 million riders33 Metro bus routes
How does reliability affect ridership?
Incorporating Travel-Time Reliability into the CMP26
Frei
ght
Ton
nag
e (
in t
he
1,0
00
,00
0s)
Growth in Freight Tonnage 1990 to 2012
Data Source: American Trucking Associations
Year
Incorporating Travel-Time Reliability into the CMP27
Freight Carriers and Shippers
Reliability paramount for profitable operations
Equipped vehicles for data collection
Just in time delivery imposes narrow windows on drivers
Automated reporting of hours of service
Cities restrict peak period deliveries
Incorporating Travel-Time Reliability into the CMP28
Costs of Unreliable Travel to Shippers and Carriers
Delays increase cost of transporting goods by 50% to 250% (USDOT FHWA 2006) Buffer Time Index for Trucks on Major Freight Corridors in 2005
Image Source: Freight Performance Measurement: Travel time in Freight-Significant Corridors, FHWA
Incorporating Travel-Time Reliability into the CMP29
Value of Incorporating Reliability Into the CMP
Systematic method to address issues is already in place
Monitoring
Problem identification
Generation of strategies
Evaluation of strategies
Provides a robust understanding of regional transportation
Recurrent congestion
Non-recurrent congestion
Incorporating Travel-Time Reliability into the CMP30
Value of Incorporating Reliability Into CMP
Expands the toolbox of strategies to address congestion
Cost-saving management and operations strategies
Minimize impacts
Incorporating Travel-Time Reliability into the CMP31
Technological Advances for Continuous
Data Collection
Permanent detectors (spot speeds)
Loop
Video
Wireless communications (point-to-point)
In-vehicle personal navigation devices
In-vehicle commercial navigation devices
Bluetooth readers
Electronic toll tags
Automatic vehicle locators (for transit)Image Source: Kittelson & Associates, Inc., FlickR
Incorporating Travel-Time Reliability into the CMP32
Dissemination of Devices That
Can Track Mobility
Mobile phones
2013 data indicates 10% more subscriptions than population (1)
Bluetooth
90% of all 2014 mobile phones are equipped (2)
Electronic toll tags
70% to 90% of drivers on many tolled roads
Intelligent Transportation Systems
Infrastructure
In-vehicle
Communication between them
Source: Michigan Department of Transportation, Connected Vehicle Update, October 2011, Vol. 4, No. 1, Courtesy of the U.S. Department of Transportation
Incorporating Travel-Time Reliability into the CMP33
Data Availability
Private vendors analyze travel times
Resellers: results available for a fee Proprietary use: trucking and delivery companies
National Performance Monitoring Research Data Set (NPMRDS)
Average travel time in 5-minute segments Data from National Highway System
From October 2011 on Interstate From July 2013 for other roads
Local sources
Traffic management centers Transit agencies Previous studies
Original data collection
Source: Kittelson & Associates, Inc.
Incorporating Travel-Time Reliability into the CMP34
Reliability Research and Analysis Tools
Planning for Operations
The Second Strategic Highway Research Program (SHRP 2)
Highway Capacity Manual
Incorporating Travel-Time Reliability into the CMP36
Five (5) Key CMP
Actions Into Which
Reliability Can Be
Incorporated
Action 8
Action 6
Action 5
Action 3
Action 1
Incorporating Travel-Time Reliability into the CMP38
Where does an agency start when it comes to
incorporating reliability into the Process?
Incorporating Travel-Time Reliability into the CMP39
Action 1Develop objectives to
guide you through the Process.
Incorporating Travel-Time Reliability into the CMP40
CMP Action 1 – Develop
Regional Objectives
Resources
Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes: A Guide (SHRP 2 L05)
Congestion Management Process: A Guidebook
Advancing Metropolitan Planning for Operations: The Building Blocks of a Model Transportation Plan Incorporating Operations – A Desk Reference
Incorporating Travel-Time Reliability into the CMP41
CMP Action 1 – Develop Regional Objectives
Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes: A Guide (SHRP 2 L05)
Encourages examining current reliability performance before setting goals
Identifies data and types of info useful for establishing goals
Incorporating Travel-Time Reliability into the CMP42
CMP Action 1 – Develop Regional Objectives
Congestion Management Process: A Guidebook
Reliability goal and objective ideas
Ideal objectives are SMART
Specific
Measurable
Agreed (stakeholders from wide range of backgrounds)
Realistic
Time-bound (“by 2015”).
Incorporating Travel-Time Reliability into the CMP43
CMP Action 1 – Develop Regional Objectives
Sample Objectives Reduce hours of delay per capita by 15%
percent by year 2030
Reduce mean incident clearance time per incident by 20% percent over 8 years
Improve average on-time performance for specified transit routes/facilities by 25% within 5 years
Passenger loads on transit routes at each route's busiest point should not exceed 50 passengers on any vehicle (or on average) during the hour during peak/off-peak periods
Incorporating Travel-Time Reliability into the CMP44
CMP Action 1 – Develop Regional Objectives
Advancing Metropolitan Planning for Operations: The Building Blocks of a Model Transportation Plan Incorporating Operations – A Desk Reference
Reliability objective ideas
Incorporating Travel-Time Reliability into the CMP45
CMP Action 1 – Develop Regional Objectives
Category Operations Objective
Non-Recurring
Delay
Reduce total person hours of delay (or travel-time delay per capita) by
time period (peak, off-peak) caused by:
• (Option 1) scheduled events, work zones, or system maintenance by
X hours in Y years.
• (Option 2) unscheduled disruptions to travel by X hours in Y years.
• (Option 3) all transient events such as traffic incidents, special events,
and work zones by X hours in Y years.
Travel Time Buffer
Index
Decrease the buffer index for (specific travel routes) by X percent over
the next Y years.
Decrease the average buffer index for (multiple routes or trips) by X
percent over Y years.
Reduce the average buffer time needed to arrive on-time for 95 percent
of trips on (specified routes) by X minutes over Y years.
Incorporating Travel-Time Reliability into the CMP46
CMP Action 1 – Develop Regional Objectives
Category Operations Objective
Planning Time
Index
Reduce the average planning time index for (specific routes in region)
by X (no units) over the next Y years.
Reduce the average planning time for (specific routes in region) by X
minutes over the next Y years.
Travel Time
Reduce the average of the 90th (or 95th) percentile travel times for (a
group of specific travel routes or trips in the region) by X minutes in Y
years.
Reduce the 90th (or 95th) percentile travel time for each route selected
by X percent over Y years.
VariabilityReduce the variability of travel time on specified routes by X percent
during peak and off-peak periods by year Y.
Transit On-Time
Performance
Improve average on-time performance for specified transit
routes/facilities by X percent within Y years.
Incorporating Travel-Time Reliability into the CMP47
How does an agency track and assess if the reliability-related
objectives are achieved?
Incorporating Travel-Time Reliability into the CMP49
CMP Action 3 – Develop Multimodal
Performance Measures
Resources
Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes: A Guide (SHRP 2 L05)
Highway Capacity Manual Chapter 36 (Volume 4)
Advancing Metropolitan Planning for Operations: The Building Blocks of a Model Transportation Plan Incorporating Operations – A Desk Reference
Incorporating Travel-Time Reliability into the CMP50
CMP Action 3 – Develop Multimodal Performance Measures
Examples
Travel Time Index
Planning Time Index
Others
Source: SHRP 2 Report L05, Incorporating Reliability Performance Measures into the Transportation Planning and Programming Process: A Guide
Incorporating Travel-Time Reliability into the CMP54
CMP Action 3 – Develop Multimodal Performance Measures
Partnerships for objectives and performance measures
Other Potential Partners
Major employers and universities
Major venue operators
Freight and delivery companies
Local weather experts
Public Agencies
State Departments of Transportation
Transit agencies
Toll authorities
City and county DPW
Local traffic signal operators and technicians
Local and state public safety agencies
Police
Fire
Emergency responders
Incorporating Travel-Time Reliability into the CMP55
CMP Action 3 – Develop Multimodal Performance Measures
Checklist self-assessment exercise
X
X
X
Incorporating Travel-Time Reliability into the CMP1
How does an agency analyze the causes of non-recurring
congestion?
Incorporating Travel-Time Reliability into the CMP3
Reliability analysis differs from typical studies:
More data
More resources
More staff effort
… But the upsides are:
Addressing concerns of the traveling public and freight industry
Opening doors to cost-effective solutions
Alignment with the national system reliability goal Source: Kittelson & Associates
Incorporating Travel-Time Reliability into the CMP4
Establishing Monitoring Programs for Travel Time Reliability: A Guidebook (SHRP 2 L02)
Design Guide for Addressing Nonrecurrent Congestion (SHRP 2 L07)
Incorporation of Travel Time Reliability into the HCM (SHRP 2 L08)
Incorporating Travel-Time Reliability into the CMP5
Step 1: Choose the facilities and study periods for analysis
Step 2: Collect data
Step 3: Estimate reliability from other data sources if direct
measures are not available
Step 4: Investigate and diagnose causes of reliability
problems
Incorporating Travel-Time Reliability into the CMP6
Focus on facilities, days of the week, and times of the day where reliability is likely to be a significant issue
Including times of day and days of year where there are few reliability problems will tend to “wash out” results
Selection of facilities for analysis should include occurrences of:
Regular peak period congestion
Crashes
Special events
Work zones
Weather-related incidents
Source: Kittelson & Associates
Incorporating Travel-Time Reliability into the CMP8
Original data – Minimum of one-year duration, such as:
Incident logs
Archived weather conditions
Road work logs
24-hour traffic counts and speeds
Other sources
National Performance Management Research Data Set (NPMRDS)
http://www.ops.fhwa.dot.gov/perf_measurement/index.htm
Private sector
Traffic management centers
Source: Kittelson & Associates
Incorporating Travel-Time Reliability into the CMP9
Identification and Evaluation of Cost-Effectiveness of
Highway Design Features to Reduce Nonrecurrent
Congestion (SHRP 2 L07 Design Guide)
Spreadsheet tool to predict reliability distributions using these inputs:
Average annual demand/capacity ratio
Annual lane-hours lost due to incidents and work zones
Source: Kittelson & Associates
Incorporating Travel-Time Reliability into the CMP10
Highway Capacity Manual Reliability Models (SHRP 2 L08)
Inputs required for freeways and arterials
Geometric
Intersection control
Demand and its variability
Weather events
Incident data
Methodologies provide default variability factors , but…
Local, site-specific data is best whenever feasible
Incorporating Travel-Time Reliability into the CMP11
If travel time archives are available…
Establishing Monitoring Programs for Travel Time Reliability Guidebook (SHRP 2 L02)
Group facility into 5-minute segments
Determine “congested” verses “uncongested” time periods
Analyst scans time period for incidents
Additional details at http://www.trb.org/StrategicHighwayResearchProgram2SHRP2/DataandAnalysisfor.aspx
Incorporating Travel-Time Reliability into the CMP12
If travel time reliability was estimated…
Return to the tools used for diagnosing causes
Design Guide for Addressing NonrecurrentCongestion (SHRP 2 L07)
Incorporation of Travel Time Reliability into the HCM (SHRP 2 L08)
Incorporating Travel-Time Reliability into the CMP14
How does an agency analyze the reliability of their
transportation system?
Incorporating Travel-Time Reliability into the CMP15
Field (Probe) Data Analytics
Requires continuous data from system detectors and/or probes
Limited to past/present conditions
Useful for before/after evaluations and trend analysis
Doesn’t explicitly explain “why” a condition occurred
Model Estimation
Field is less mature – several models currently being developed/tested/applied
Enables prediction of future conditions and ‘what if’ analysis
Multiple models developed out of the SHRP 2 program (L04, L07, and L08)
Incorporating Travel-Time Reliability into the CMP16
Source: SHRP 2 Report L05, Incorporating Reliability Performance Measures into the Transportation Planning and Programming Process: A Guide
Reliability
MeasureFormula
Travel Time Index
(TTI): The total time
required to arrive at a
destination on-time
X% of the time
compared to free flow
conditions.
𝑋 𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑖𝑙𝑒 𝑜𝑓 𝑇𝑇
𝐹𝑟𝑒𝑒 𝐹𝑙𝑜𝑤 𝑇𝑇
Planning Time Index
(PTI): The total time
required to arrive at a
destination on-time
95% of the time
compared to free flow
conditions.
95𝑡ℎ 𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑖𝑙𝑒 𝑜𝑓 𝑇𝑇
𝐹𝑟𝑒𝑒 𝐹𝑙𝑜𝑤 𝑇𝑇
TT = Travel Time
Incorporating Travel-Time Reliability into the CMP17
Multiple probe-based data sources available:
Inrix.com
Here.com
RITIS.com
NPMRDS (free to States and MPOs)
National Performance Management Research Data Set
(NPMRDS)
Observed mean passenger vehicle and truck travel times
Covers National Highway System
Data averaged by five-minute periods by direction
Historic data available for Interstate freeways back to October 2011
Historic data available for Arterials back to July 2013
Incorporating Travel-Time Reliability into the CMP18
NPMRDS Monthly Average Travel Times Data File
Traffic Message Channel (TMC) Code (a segment of road)
Date (MMDDYYYY)
Epoch (5 minute period of the day)
Travel Time – all vehicles (seconds)
Travel time – passenger vehicles (seconds)
Travel Time – Freight Vehicles (seconds)
FAQs:http://ops.fhwa.dot.gov/freight/freight_analysis/perform_meas/vpds/npmrdsfaqs.htm
Source: http://www.fhwa.dot.gov/planning/national_highway_system/
Incorporating Travel-Time Reliability into the CMP20
Total archive is 5-6GB per month, saved as a text file
Overall archive to date is approximately 700GB (raw data)
Data are provided as travel times; should be converted (back) to
speeds for analysis
Data are in “raw” format for 5-minute epochs, without cleaning or
post-processing
Incorporating Travel-Time Reliability into the CMP21
Scoping the Study
• Define the study segment (spatial scope)
• Define necessary study duration (temporal scope)
• Identify comparison segments
Processing the Data
• Download and store the travel time data*
• Convert travel time data to speeds and format data*
• Error-check and filter erroneous data*
• Finalize tidied data tables*
Analyzing and Interpreting the Data
• Run before and after analysis*
• Quantify and visualize performance measures *
• Interpret performance impacts and differences
• Make inference about other locations
* Step can be partially or fully automated by computational engine or software
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## 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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ## # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
8:00 PM
9:00 PM
10:00 PM
11:00 PM
2:00 PM
3:00 PM
4:00 PM
5:00 PM
6:00 PM
7:00 PM
8:00 AM
9:00 AM
10:00 AM
11:00 AM
12:00 PM
1:00 PM
2:00 AM
3:00 AM
4:00 AM
5:00 AM
6:00 AM
7:00 AM
23 24 25 26
12:00 AM
1:00 AM
17 18 19 20 21 2211 12 13 14 15 165 6 7 8 9 10Week # 1 2 3 4
Incorporating Travel-Time Reliability into the CMP28
StatisticsTravel Speed (Daily) in mi/h
Before Work Zone (2013) With Work Zone (2014)
min 0.62 0.62
max 90.48 87.36
average 64.77 60.85
Standard deviation (SD) 6.58 10.98
% data left of mean 41.16% 29.76%
% data right of mean 58.84% 70.24%
85 percentile 69.89 68.47
95 percentile 72.91 71.36
99 percentile 76.20 75.07
Skewness -2.78 -2.30
Kurtosis 19.95 9.54
Incorporating Travel-Time Reliability into the CMP30
Segment 1 I-40 (upstream)
Segment 3I-40 (alternate)
Segment 4US70 (alternate)
Segment 5 Capital Blvd(alternate)
Segment 2 I-440 (in WZ)
Incorporating Travel-Time Reliability into the CMP31
Segment 1 I-40 (upstream)
Segment 3I-40 (alternate)
Segment 2 I-440 (in WZ)
Incorporating Travel-Time Reliability into the CMP32Segment 1
I-40 (upstream)
Segment 3I-40 (alternate)
Segment 2 I-440 (in WZ)
Incorporating Travel-Time Reliability into the CMP33
Segment 4US70 (alternate)
Segment 5 Capital Blvd(alternate)
Incorporating Travel-Time Reliability into the CMP34
Segment 4US70 (alternate)
Segment 5 Capital Blvd(alternate)
Incorporating Travel-Time Reliability into the CMP37
Source: Indiana Mobility Report 2013-2014, Purdue University, http://docs.lib.purdue.edu/imr/6/
Radial Chart Spatial Histogram
Source: Kittelson & Associates, Inc.
Incorporating Travel-Time Reliability into the CMP38
• Key considerations in selecting minimum sample size
include: AADT, Time of Day, and Segment Length
• Exercise caution when working with data that are
“smoothed” to fill gaps; “outliers” can be important in
describing facility performance
• Use of statistical distributions and visualization
techniques are essential for understanding the “full
picture” of facility performance
Incorporating Travel-Time Reliability into the CMP40
How does an agency identify and evaluate strategies to
improve reliability?
Incorporating Travel-Time Reliability into the CMP42
Sample
Goal Reduce non-recurring delay
High-level Objective
Reduce unplanned/unexpected non-recurring delay
Targeted Objective
Improve incident management
SMART Goal Reduce average incident response time by 15 minutes and incident duration by 30 minutes in peak
Potential Supporting Strategies to Evaluate
Reduce time to post traveler alert on dynamic message signs
Increase number of corridors covered by incident response teams
Increase number of signals with transit priority and emergency pre-empt
Organize additional regional coordinated incident response teams
Incorporating Travel-Time Reliability into the CMP43
Four Strategy Areas:1. Demand Management2. Operational
Improvements3. Public Transportation
Improvements4. Road Capacity
Improvements
Adapted from Congestion Management Process: A Guidebook, Federal Highway Administration, FHWA-HEP-11-011.
Incorporating Travel-Time Reliability into the CMP44
Enhancing system performance by influencing:
Trip time
Mode(s) choice
Route(s) choice
Capacity availability
Lane use
Speed
Service rate
Source: FHWA ATDM Evaluation Guidebook Pilot Workshop (2011)
Incorporating Travel-Time Reliability into the CMP45
Temporary use of shoulder as a travel lane
Source: FHWA ATDM Evaluation Guidebook Pilot Workshop (2011)
Incorporating Travel-Time Reliability into the CMP46
Regulate the number of vehicles entering or leaving a freeway.
Traffic smoothing
Incorporating Travel-Time Reliability into the CMP47
Dynamic lane allocation for directional flow. On-ramp and Off-
ramp
Incorporating Travel-Time Reliability into the CMP49
Dynamically adjusting speed limits in critical areas to maintain
flow rate and reduce risk of collision
Incorporating Travel-Time Reliability into the CMP50
Toll amount increases as traffic gets heavier and
decreases as congestion eases. Ensures free-
flow operation
Area-wide, Zone-based, Roadways, Lanes
Incorporating Travel-Time Reliability into the CMP51
Access Control
Intersection movements
Managed lane access
Ramp access
Dynamic truck restrictions
Incorporating Travel-Time Reliability into the CMP52
Casual carpooling
San Francisco
www.ridenow.org/carpool
Slugging
DC metro, VA
www.slug-lines.com/
Dynamic ridesharing
Incorporating Travel-Time Reliability into the CMP53
Estimated travel times for
specific routes
Re-routing motorists to less
congested facilities
Incorporating Travel-Time Reliability into the CMP54
A facility that increases freeway efficiency by
packaging various operational and design actions.
Lane management operations may be adjusted at any
time to better match regional goals.
Incorporating Travel-Time Reliability into the CMP60
http://onlinepubs.trb.org/onlinepubs/shrp2/SHRP2_L31_PresentationGuide.pdf
Incorporating Travel-Time Reliability into the CMP61
How does an agency monitor and report reliability?
Incorporating Travel-Time Reliability into the CMP62
Action 8
Information Flow in a Travel-Time
Reliability Monitoring System
Incorporating Travel-Time Reliability into the CMP63
V/C
LOS
Delay
TTI
Buffer
PTI
PT
RI
Throughput
85th%
95th%
Source: Delaware Valley Regional Planning Council
Incorporating Travel-Time Reliability into the CMP64
Tell a story
Educate
Justify
Source: Delaware Valley Regional Planning Council. Available at: www.dvrpc.org/asp/pubs/publicationabstract.asp?pub_id=NL13011