Date post: | 26-Mar-2015 |
Category: |
Documents |
Upload: | christopher-murphy |
View: | 247 times |
Download: | 1 times |
Census TransportationCensus TransportationPlanning PackagePlanning Package
Ed J. ChristopherFHWA Resource Center near Chicago
19900 Governors DriveOlympia Fields, IL 60461
708-283-3534
June 3, 2004June 3, 2004
TodayToday
Briefly overview the CTPPBriefly overview the CTPP
Punctuate some of the more Punctuate some of the more technical issues to be technical issues to be
aware of aware of when working with when working with your datayour data
Give you some TIPs for getting Give you some TIPs for getting startedstarted
WhatWhat is the CTPP? is the CTPP?
The Census Transportation The Census Transportation Planning Package is a set of special Planning Package is a set of special
tabulations from the long form of tabulations from the long form of the decennial census designed by the decennial census designed by
transportation planners for transportation planners for transportation plannerstransportation planners
It summarizes the dataIt summarizes the data
At ResidenceAt ResidenceAt WorkplaceAt Workplace
Flows between Flows between Home and WorkHome and Work
WhatWhat are the CTPP are the CTPP Products?Products?
Tabulations Tabulations at Residenceat Residence
Tabulations Tabulations at Workplaceat Workplace
Flows between Flows between HomeHome and and WorkWork
Part 1Part 1 Part 2Part 2 Part 3Part 3
Who paid for it?Who paid for it?
Buyers/UsersBuyers/Users Direct CostDirect Cost TablesTables
19601960 OMBOMB ?????? ??????
19701970 112112 $0.6 M$0.6 M 4343
19801980 152152 $2.0 M$2.0 M 8282
19901990 $2.5 M$2.5 M 120120
20002000 $3.0 M$3.0 M 203203All StatesAll States
and MPOsand MPOs
When is it due out?When is it due out?
Residence Based TablesResidence Based TablesOct 2002 Mar. 03 AprilOct 2002 Mar. 03 April
June July-August 2003June July-August 2003
CTPP is coming out in 3- waves
Workplace & Worker Flow TablesWorkplace & Worker Flow Tables
Summer 2003 Summer 2003 Fall 2003Fall 2003
-------------------
------------
--- ------------
-------------------------
--------
---
-
------------
---Winter 2003-2004 and Spring / Summer 2004Winter 2003-2004 and Spring / Summer 2004
____
------
Why all the delay?Why all the delay?
Disclosure Review Board NegotiationsDisclosure Review Board Negotiations (Sept 2001 to Jan 2002)---5 months(Sept 2001 to Jan 2002)---5 months
People Living in Group Quarters Issues People Living in Group Quarters Issues (Jan to May 2003)---5 months(Jan to May 2003)---5 months
Inexcusable delays caused by CB on whether or not 13 Inexcusable delays caused by CB on whether or not 13 tables in CTPP Part 1 could be released. Finally, CB tables in CTPP Part 1 could be released. Finally, CB agreed to allow all but 3 Tables originally identifiedagreed to allow all but 3 Tables originally identified
Dave Clawson, AASHTODave Clawson, AASHTO
Why the 2003 Delay?Why the 2003 Delay?Group Quarters IssueGroup Quarters Issue
Fear by Census Bureau that one could Fear by Census Bureau that one could identify the “characteristics” of workers identify the “characteristics” of workers who live in group quarters by subtractionwho live in group quarters by subtraction
SF3--Workers SF3--Workers who live in who live in
Households and Households and
Group QuartersGroup Quarters
CTPP--CTPP--Workers who Workers who
live in live in Households Households
Workers who Workers who live in Group live in Group
Quarters Quarters -- ==
Modes Used Modes Used Modes Used
The CATThe CATCTPP Access ToolCTPP Access Tool
How is it packaged?How is it packaged?
ASCII TooASCII Too
What is the Distribution What is the Distribution Process?Process?
CDs with Extraction SoftwareCDs with Extraction Software To MPOs and States FirstTo MPOs and States First
(ASCII also available(ASCII also available) ) 30 Day review period30 Day review period
Corrections madeCorrections made
Quantities prepared and RedistributedQuantities prepared and Redistributed
BTS (and others) distribution program(s)BTS (and others) distribution program(s)
What is the Production What is the Production Process?Process?
Typical ProcessTypical Process Preliminary ASCII file producedPreliminary ASCII file produced
Preliminary CAT prepared-IVT filesPreliminary CAT prepared-IVT files
Review and Correction PeriodReview and Correction Period
Final ASCII producedFinal ASCII producedFinal CAT producedFinal CAT produced
Currently, Where are we?Currently, Where are we?
Part 1 -- Residence DataPart 1 -- Residence Data
BTS has Final ASCII version on TranStatsBTS has Final ASCII version on TranStats
Census is working on Final CAT FilesCensus is working on Final CAT Files
Part 2—Work Place DataPart 2—Work Place DataPreliminary ASCII on TranStatsPreliminary ASCII on TranStats
Census working on CorrectionsCensus working on Corrections
Part 3— Flow DataPart 3— Flow DataSlightly different processSlightly different process
Part 3 Part 3 Home Home Work Flow TablesWork Flow Tables
ACSII files on BTS ServerACSII files on BTS ServerTract to TractTract to Tract (May 7)(May 7)
TAZ to TAZTAZ to TAZ (May 25)(May 25)
CAT Software DistributedCAT Software DistributedJulyish?Julyish?
No Corrections ExpectedNo Corrections Expected
Will there be Training?Will there be Training?
Yes! Sort ofYes! Sort of
Provides all basics on understanding, using Provides all basics on understanding, using and working with the CTPP data in a and working with the CTPP data in a transportation planning contexttransportation planning context
Total Total Total TotalDrove Alone Drove Alone Drove Alone Drove Alone
2 Person Carpool 2 Person Carpool 2 Person Carpool3 Person Carpool 3 Person Carpool4 Person Carpool
5-6 Person Carpool7+ Person Carpool
Bus/Trolley Bus Bus/Trolley Bus Bus or Trolley BusStreetcar/TrolleySubway/Elevated
RailroadFerryboat
BicycleWalkedTaxicab
MotorcycleOther Means
Worked at Home Worked at Home Worked at Home
18 Modes 11 Modes 8 Modes 5 Modes
Bicycle/Walked
Taxicab/ Motorcycle/other
Means
Bus/Trolley Bus/ Streetcar/Trolley/ Subway/Elevated/
Railroad/ Ferryboat
Bicycle/ Walked/ Taxicab/
Motorcycle/other Means/ Worked at
Home
Streetcar/Trolley/ Subway/Elevated/
Railroad/ Ferryboat
Bicycle/Walked/ Taxicab/
Motorcycle/other Means
Streetcar/Trolley/ Subway/Elevated
Railroad/ Ferryboat
Means of Transportation to Work
3+ Person Carpool2+ Person Carpool
4+ Person Carpool
SampleSample
Variable ListVariable List
NOTE: Age has 3 NOTE: Age has 3 levels, clusters or levels, clusters or elementselements
Sample Table ListSample Table List
Disclosure Review BoardDisclosure Review Board
CTPP 2000 Post DRB
Part 1: at Residence (121 Tables) All Tables Rounded Zero = 0 1 through 7 = 4 8 though = Nearest Multiple of “5”
Part 2: at Workplace (68 Tables) All Tables Rounded
Part 3: Worker Flows (14 Tables) All Tables Rounded Some Tables with Thresholds
Mode to Work
Circa 1990For 2000
(ROUNDED)
Total 352 350 (not 355!)
Drive Alone 212 210
Carpool 46 45
Transit 59 60
Walk 33 35
Bike 2 4
Example of RoundingExample of Rounding
True Total 354True Total 354
Using the CTPP, 10 + 10 + 10 + 10 = ?Using the CTPP, 10 + 10 + 10 + 10 = ?
Pop Quiz!Pop Quiz!
a)a) 30 30 c)c) 35 35 e)e) 40 40b)b) 45 45 d)d) 50 50 f)f) Any of the Any of the
Above Above
Here's a real life example using the CTPP Part 2 data. Let's Here's a real life example using the CTPP Part 2 data. Let's say my boss asks as simple question: "How many transit say my boss asks as simple question: "How many transit commuters are at work in the Bay Area?" Using the Part 2 commuters are at work in the Bay Area?" Using the Part 2 data, I am able to provide my boss 15 different answers!data, I am able to provide my boss 15 different answers!
Chuck Purvis, MTCChuck Purvis, MTC
Total SOV Carpool Bus Rail Other Home Row TotL11423 49,275 12,200 3,915 6,410 24,580 2,160 10 49,275L11428 29,365 8,315 2,340 4,210 12,780 1,715 4 29,364L11446 15,035 3,705 1,240 2,430 7,010 640 15 15,040L11448 5,200 3,115 550 570 745 150 65 5,195L11449 25,655 7,240 2,120 2,775 12,325 1,195 0 25,655L12427 920 410 155 65 85 95 105 915L12428 9,610 3,025 835 1,660 3,535 555 0 9,610L12446 22,115 4,925 1,770 4,595 9,915 905 0 22,110L12449 67,795 14,565 4,820 8,035 36,950 3,420 0 67,790
Rest 124,955 34,255 10,324 17,410 57,165 5,460 328 124,942 349,896
Col Tot 349,925 91,755 28,069 48,160 165,090 16,295 527
349,896Sum of Column Total
Chicago CBD Chicago CBD --CTPP 2000 DataCTPP 2000 Data
1.1. Obtain your "regional control totals" Obtain your "regional control totals" from from the most geographicallythe most geographically aggregate aggregate summary levels.summary levels.
2.2. Avoid aggregating (summing together) your Avoid aggregating (summing together) your geographiesgeographies
3.3. Avoid aggregating categories.Avoid aggregating categories.4.4. Sum as few categories as possible.Sum as few categories as possible.5.5. Adjust (de-round, un-round) as you see fit. SF3 or Adjust (de-round, un-round) as you see fit. SF3 or
PUMS can provide control totals to adjust the CTPP PUMS can provide control totals to adjust the CTPP Part 1 data.Part 1 data.
6.6. Develop a sense of humor.Develop a sense of humor.
Rounding TipsRounding Tips
So it is "close enough for government work"So it is "close enough for government work"
Table Content
1 Total Workers (1)
2 Vehicles Available (3--zero,one or two+) by Means of Transportation (7 modes)
3 Poverty Status (3 categories)
4 Minority Status (2--white non-hispanic and all others)
5 Household Income (8 classifications)
6 Means of Transportation (17 modes)
7 Household Income (4 classifications) by Means of Transportation (4 modes)
8Mean Travel Time by Means of Transportation to Work (7 modes) and Time
Leaving Home for Work (2--AM peak and all other times)
9Median Travel Time by Means of Transportation to Work (7 modes) and Time
Leaving Home for Work (2 groupings)
10 Aggregate Number of Vehicles by Time Leaving Home for Work (2, see table 8)
11 Number of Workers per Vehicle by Time Leaving Home for Work (2, see table 8)
12 Aggregate Number of Carpools by Time Leaving Home for Work (2, see table 8)
13 Number of Workers per Carpool by Time Leaving Home for Work (2, see table 8)
14Aggregate Travel Time by Means of transportation to work (7 modes) and Time
Leaving Home for Work (2, see table 8)
Part 3: Worker Flow Tables
No record No record thresholdthreshold
Must have 3 Must have 3
unweighted unweighted
recordsrecords
http://www.trbcensus.com/articles/ctppworkers.pdfhttp://www.trbcensus.com/articles/ctppworkers.pdf
Workers at Work Counts vs. Workers at Work Counts vs. Other Employment SourcesOther Employment Sources
Total jobs are HIGHER than CTPP Total jobs are HIGHER than CTPP worker countsworker counts
CTPP uses NAICS, others may use SICCTPP uses NAICS, others may use SIC
Multi-site businesses and job types not reported Multi-site businesses and job types not reported consistentlyconsistently
Census 2000 employment estimates vs CPSCensus 2000 employment estimates vs CPS
Extended Allocation for CTPP small areasExtended Allocation for CTPP small areas
When I get my CTPP CD-ROM HomeWhen I get my CTPP CD-ROM Home
What should I do?What should I do?
Pop it into your CD DrivePop it into your CD Drive
Explore what is on itExplore what is on it
X
Install the Viewer SoftwareInstall the Viewer Software
I let it put it the data viewer with all my other I let it put it the data viewer with all my other operating programsoperating programs
After the machine rebooted and theAfter the machine rebooted and the2020 data viewer (aka the browser)2020 data viewer (aka the browser)was successfullywas successfullyinstalled here isinstalled here iswhat I didwhat I did
Looked to see what was on CDLooked to see what was on CD
Browsed all the files and directoriesBrowsed all the files and directories
Browsed all the files and directoriesBrowsed all the files and directories
Created a Directory Structure where I wanted Created a Directory Structure where I wanted to keep the “to keep the “DataData” and “” and “SessionsSessions””
800 meg800 meg
Moved files from CD including DocsMoved files from CD including Docs
Off to the races using my CTPPOff to the races using my CTPP
With all this said and done now With all this said and done now what can I do?what can I do?
Build Regional and sub-area Data ProfilesBuild Regional and sub-area Data Profiles
Add Trends to your ProfilesAdd Trends to your Profiles
Make the Information AvailableMake the Information Available
Incorporate data into Planning ProcessIncorporate data into Planning Process
Stay ConnectedStay Connected
Are You on the CTPP-News Listserve?
Have You Seen our Newsletter (the Status Report)?
http://www.dot.gov/ctpphttp://www.dot.gov/ctpp
http://www.TRBcensus.comhttp://www.TRBcensus.com
202-366-5000202-366-5000
When Mining Your Census DataWhen Mining Your Census DataKeep us in MindKeep us in Mind
Let Us Know What You Have DoneLet Us Know What You Have DoneWe Are Always Interested We Are Always Interested
Want to…Want to…Show Off Your Work?Show Off Your Work?Gain National Gain National Exposure?Exposure?Meet Other Data Users?Meet Other Data Users?Tour Washington DC?Tour Washington DC?
Sound Exciting?Sound Exciting?
TRB Urban Data and Information Systems CommitteeTRB Urban Data and Information Systems Committee
Ed Christopher-Chair (708-283-3534)Ed Christopher-Chair (708-283-3534)