Understanding MAP-21 Performance Measures and NPMRDS Data
Delve into the realm of MAP-21 performance measures by utilizing NPMRDS data for assessing travel time reliability, peak hours of delay, and more. Learn about NPMRDS, its sources, and the process of calculating these measures independently or with external help.
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Calculating MAP-21 Performance Measures Using NPMRDS Data Chris Upchurch Wichita Area Metropolitan Planning Organization
MAP-21 System Performance Measures Using NPMRDS Data Level of Travel Time Reliability Interstate Non-Interstate NHS Truck Travel Time Reliability Peak Hours of Excessive Delay per capita
MAP-21 System Performance Measures Using NPMRDS Data Level of Travel Time Reliability Interstate Non-Interstate NHS Truck Travel Time Reliability Peak Hours of Excessive Delay per capita
MAP-21 System Performance Measures How many of you plan to calculate these yourselves?
MAP-21 System Performance Measures How many of you plan to calculate these yourselves? How many plan to hire a consultant or use off- the-shelf software?
MAP-21 System Performance Measures How many of you plan to calculate these yourselves? How many plan to hire a consultant or buy off- the-shelf software? How many haven t made a decision?
What is NPMRDS? National Performance Management Research Data Set
What is NPMRDS? Travel time data for road segments 5 minute time increments Covers the National Highway System Based on cellphone apps and in-vehicle navigation systems Travel time data Passenger vehicles Trucks All vehicles
What is NPMRDS Since February 2017 the NPMRDS data has been provided by the University of Maryland CATT Lab Data from INRIX Texas A&M Transportation Institute KMJ Consulting
How many have downloaded NPMRDS data and looked at it?
How many of you have done something with NPMRDS data?
Tools for Calculating MAP-21 Performance Measures RITIS
NPMRDS Network In theory there is no difference between theory and practice
NPMRDS Network In theory there is no difference between theory and practice, in practice there is. Yogi Berra
NPMRDS Network In theory: NPMRDS = NHS In practice NPMRDS NHS
NPMRDS Network Cross streets
NPMRDS Network Cross streets Ramps
Downloading the NPMRDS Data http://npmrds.ritis.org Massive Data Downloader
Downloading the NPRMDS Data RITIS Provides a lot of options for customizing your dataset when you download Customize your download or process the data after downloading?
Downloading the NPRMDS Data Geography By State or County Manual selection on map List of TMC codes Can save these for future reference
Downloading the NPRMDS Data Geography Create a download for all the relevant counties Download the GIS shapefile Edit the shapefile until I have only the TMCs I actually want Repeat for each network we re interested in Interstate Non-Interstate NHS Use that list of TMCs to download the NPMRDS data
Downloading the NPMRDS Data Day of Week/Time of Day The final rule has 5 time periods Morning: 6am to 10am (weekdays) Midday: 10am to 4pm (weekdays) Afternoon: 4pm to 8pm (weekdays) Weekends: 6am to 8pm (weekends) Overnight: 8pm to 6am (all days of the week, freight measure only)
Downloading the NPMRDS Data Day of Week/Time of Day Can choose to download for any combination of days of the week or times of day
Downloading the NPMRDS Data Day of Week/Time of Day Download 24/7 data and process later
Downloading the NPMRDS Data Type of Vehicle Passenger vehicles Trucks Trucks and Passenger vehicles
Downloading the NPMRDS Data Type of Vehicle Passenger vehicles Trucks Trucks and Passenger vehicles
Downloading the NPMRDS Data Units of Time Minutes (to two decimal places) Seconds
Downloading the NPMRDS Data Units of Time Minutes (to two decimal places) Seconds
Downloading the NPMRDS Data Time Interval 5 minutes ( Don t Average ) 10 minutes 15 minutes 1 hour
Downloading the NPMRDS Data Time Interval 5 minutes ( Don t Average ) 10 minutes 15 minutes 1 hour
Tools for NPMRDS Statistical Tools Databases Custom software
Level of Travel Time Reliability Metric For each TMC segment and time of day Divide: 80th Percentile Travel Time 50th Percentile Travel Time If a segment has a ratio of <1.5 for all time intervals it is considered reliable
Level of Travel Time Reliability Measure Sum for all reliable segments: Segment Length x Annual Volume x Occupancy Factor divided by Sum for all segments: Segment Length x Annual Volume x Occupancy Factor x 100
Truck Travel Time Reliability Metric For each TMC segment and time of day Divide: 95th Percentile Truck Travel Time 50th Percentile Truck Travel Time
Truck Travel Time Reliability Measure Total segment length x TTTR of the highest time interval divided by Total length of all segments
Summary Calculating these measures yourself gives you more control. RITIS download options can help make the calculations easier. Still need some sort of specialized software.
