Not in Montgomery county, where more than are reported work within the county alone. This visualization reports 250,295 total resident workers, the 2009 – 2013 ACS reports 519,287, of which ~310,000 stay in the county and another ~160,000 work in the three nearest (well within 293 miles) counties/county equivalents (DC). So, I think it can’t be that. That logic does hold in less dense areas. A random check of Alabama counties yields the same error. Maybe this is LEHD/LODES data? It is notoriously missing workers… (But even LODES shows 432,000 workers for Montgomery county, MD). From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Marchwinski, Thomas Sent: Thursday, May 26, 2016 10:26 AM To: ctpp-news(a)chrispy.net Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) They may only be mapping those flows that have enough records so there is not an imputed or suppressed O-D pair, which would mean sometimes up to 50% of the records do not have flows, so its missing half of the flows. Those show up as 0 workers due to suppression. Tom Marchwinski From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Weinberger Penelope Sent: Thursday, May 26, 2016 10:12 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) I would be cautious, just did a quick check, it says ACS, but unsourced as to what ACS (I’m guessing 2009 – 2013 county to county flows – otherwise OD pairs are very tricky), also looking at just Montgomery county and DC, and expanding the tool to its maximum range (zero to 293 miles) it’s missing about half the total workers in each of those. Also, tracts are referenced, but that set is not reported at tract. I welcome your thoughts. Penelope Z. Weinberger CTPP Program Manager AASHTO 202-624-3556 ctpp.transportation.org From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Nancy Reger Sent: Wednesday, May 25, 2016 4:08 PM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: [CTPP] CTPP animation map Check out this CTPP animation map – we didn’t make it. It’s very cool, wish we had- http://bigbytes.mobyus.com/commute.aspx Nancy Reger, AICP Director, Data & Mapping | Mid-Ohio Regional Planning Commission T: 614.233.4154 | M: 614.228.2663 | nreger(a)morpc.org<mailto:nreger(a)morpc.org> 111 Liberty Street, Suite 100 | Columbus, OH 43215 [MORPC_RGB_Secondary.png]<http://www.morpc.org/> [facebook button new.png] <http://www.facebook.com/morpc> [twitter button new.png] <http://www.twitter.com/morpc>

Hi Penelope, I have made some suggestions to Mark for how to make his commute flow tool show how all the commuters can be accounted for. He has already made some changes and plans to make some more. He has included an “ALL” button so that all lengths of commutes can be shown if choose and not just up to 300 miles, and an “ALL” button for the CV (and not just <100%). He said he would add the source of the data to the text and he may map the intratract commutes as well since it is helpful to visualize all the within county commutes. Do you know when the next set of tract to tract flow data will be available as he is willing to update when available. Thank you, Ginger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [rtcLogo_small]<http://www.sccrtc.org/> [http://icons.iconarchive.com/icons/fasticon/web-2/24/FaceBook-icon.png]<… Ginger Dykaar<mailto:gdykaar(a)sccrtc.org>, Transportation Planner Santa Cruz County Regional Transportation Commission<http://www.sccrtc.org/> 1523 Pacific Avenue | Santa Cruz, CA 95060 Direct 831.460.3213 | Main Office 831.460.3200 Watsonville Satellite Office 831.768.3205 Follow our social networks for the latest RTC news From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Weinberger Penelope Sent: Thursday, June 02, 2016 6:17 AM To: ctpp-news(a)chrispy.net Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) Turns out internal (intra-tract) flows are not reported. This should account for nearly all the missing workers. From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Marchwinski, Thomas Sent: Thursday, May 26, 2016 10:26 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) They may only be mapping those flows that have enough records so there is not an imputed or suppressed O-D pair, which would mean sometimes up to 50% of the records do not have flows, so its missing half of the flows. Those show up as 0 workers due to suppression. Tom Marchwinski From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Weinberger Penelope Sent: Thursday, May 26, 2016 10:12 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) I would be cautious, just did a quick check, it says ACS, but unsourced as to what ACS (I’m guessing 2009 – 2013 county to county flows – otherwise OD pairs are very tricky), also looking at just Montgomery county and DC, and expanding the tool to its maximum range (zero to 293 miles) it’s missing about half the total workers in each of those. Also, tracts are referenced, but that set is not reported at tract. I welcome your thoughts. Penelope Z. Weinberger CTPP Program Manager AASHTO 202-624-3556 ctpp.transportation.org From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Nancy Reger Sent: Wednesday, May 25, 2016 4:08 PM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: [CTPP] CTPP animation map Check out this CTPP animation map – we didn’t make it. It’s very cool, wish we had- http://bigbytes.mobyus.com/commute.aspx Nancy Reger, AICP Director, Data & Mapping | Mid-Ohio Regional Planning Commission T: 614.233.4154 | M: 614.228.2663 | nreger(a)morpc.org<mailto:nreger(a)morpc.org> 111 Liberty Street, Suite 100 | Columbus, OH 43215 [MORPC_RGB_Secondary.png]<http://www.morpc.org/> [facebook button new.png] <http://www.facebook.com/morpc> [twitter button new.png] <http://www.twitter.com/morpc>

I added a couple of new things. Now, when you move the distance criteria down to 0, it will include commuters that commute within the tract. The dot won't move (obviously), but it will show and the numbers will be included in the totals. Thus, if you select "ALL" for distance and "ALL" for CV you will get the full info for the county. Performance may (by which I mean definitely WILL) suffer, but the numbers will be there and the animation might be acceptable. Also, it is not really visible at all, but if you place the cursor over the map and click (not on a dot) and hold the mouse button for a full second, the map will enter a "drag" mode that will let you click again and move it around. It is still a bit clunky (and the dots disappear, making a bit harder to see where you wanted to move it.) When you finish dragging the map, or if you move the cursor outside the map, the dots will reappear. Hope this helps. I might add a few more things. Any suggestions are welcome. Cheers. Mark On Thu, Jun 2, 2016 at 3:12 PM, Weinberger Penelope <pweinberger(a)aashto.org> wrote:

In case you didn’t notice, there is a toggle/slider bar that controls the length of trips shown and the default is >20 miles, so if you don’t change that you will be missing a whole lot of flows. – Vince ……………………………………………………. VINCENT L BERNARDIN, PhD Director RSG 2709 Washington Ave., Suite 9 | Evansville, IN 47714 o 812.200.2351 | m 812.459.3500 www.rsginc.com<http://www.rsginc.com/> ……………………………………………………. [linkedin-icon-small]<http://www.linkedin.com/in/vincebernardin> From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of ALANPISARSKI Sent: Thursday, May 26, 2016 11:47 AM To: ctpp-news(a)chrispy.net Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) Yes I noticed also – very strange. From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Weinberger Penelope Sent: Thursday, May 26, 2016 10:12 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) I would be cautious, just did a quick check, it says ACS, but unsourced as to what ACS (I’m guessing 2009 – 2013 county to county flows – otherwise OD pairs are very tricky), also looking at just Montgomery county and DC, and expanding the tool to its maximum range (zero to 293 miles) it’s missing about half the total workers in each of those. Also, tracts are referenced, but that set is not reported at tract. I welcome your thoughts. Penelope Z. Weinberger CTPP Program Manager AASHTO 202-624-3556 ctpp.transportation.org From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Nancy Reger Sent: Wednesday, May 25, 2016 4:08 PM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: [CTPP] CTPP animation map Check out this CTPP animation map – we didn’t make it. It’s very cool, wish we had- http://bigbytes.mobyus.com/commute.aspx Nancy Reger, AICP Director, Data & Mapping | Mid-Ohio Regional Planning Commission T: 614.233.4154 | M: 614.228.2663 | nreger(a)morpc.org<mailto:nreger(a)morpc.org> 111 Liberty Street, Suite 100 | Columbus, OH 43215 [MORPC_RGB_Secondary.png]<http://www.morpc.org/> [facebook button new.png] <http://www.facebook.com/morpc> [twitter button new.png] <http://www.twitter.com/morpc>

Something is going on here... I can not figure it out either. First I wonder what flows are being used. The 2009 to 2013 released by the Census Bureau are only at the county to county level although the website for the visualization suggests it is track to track data http://ilikebigbytes.com/index.php/2016/05/18/acs-commuter-data-visualizati…. I did some checking on the CB website and there are no track to track flows there ( http://www.census.gov/hhes/commutin/data/commutingflows.html) that I could find. Maybe they are somewhere else, let me know. I do know that the CTPP produces track to track flows but I think we can say with confidence that is not the source. Also, doing what several others did, I did my own analysis for Cook County Illinois. Using the 2009 to 2013 ACS flow data I came up with 2,364,075 resident workers for Cook County. Setting the visualization tool to show trips between zero and 300 miles (its minimum and maximum possible) I got 977,059 resident workers. So according to my calculator 1,387,016 workers live in Cook Country Illinois and travel more that 300 miles to go to work daily. Once I find the location of these workers I will be looking for investors to help me privately build a high speed rail line ;-) In a separate email I invited the creator of the visualization product to join this listsever and sent him the link to its archive. While many of us are data people and want to understand what the data represents before advising decision-makers or drawing conclusions, I applaud this product. I think this is only one small example of what can be done with the data and hope that he will join the discussion. We need more products like this and there is whole community of "data people" out there who can help with data side. On 5/26/2016 11:47 AM, ALANPISARSKI wrote: -- Ed Christopher Transportation Planning Consultant 708-269-5237

Hi Penelope and Ed, This tool is a very nice product but hope we can get clarity on its validity. Thank you for investigating and inviting the creator onto this listserv. I will be watching and hoping this evolves into a product we can all feel confident is representative of our regions. Ginger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [rtcLogo_small]<http://www.sccrtc.org/> [http://icons.iconarchive.com/icons/fasticon/web-2/24/FaceBook-icon.png]<… Ginger Dykaar<mailto:gdykaar(a)sccrtc.org>, Transportation Planner Santa Cruz County Regional Transportation Commission<http://www.sccrtc.org/> 1523 Pacific Avenue | Santa Cruz, CA 95060 Direct 831.460.3213 | Main Office 831.460.3200 Watsonville Satellite Office 831.768.3205 Follow our social networks for the latest RTC news From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Ed Christopher Sent: Thursday, May 26, 2016 10:48 AM To: ctpp-news(a)chrispy.net Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) Something is going on here... I can not figure it out either. First I wonder what flows are being used. The 2009 to 2013 released by the Census Bureau are only at the county to county level although the website for the visualization suggests it is track to track data http://ilikebigbytes.com/index.php/2016/05/18/acs-commuter-data-visualizati…. I did some checking on the CB website and there are no track to track flows there ( http://www.census.gov/hhes/commutin/data/commutingflows.html) that I could find. Maybe they are somewhere else, let me know. I do know that the CTPP produces track to track flows but I think we can say with confidence that is not the source. Also, doing what several others did, I did my own analysis for Cook County Illinois. Using the 2009 to 2013 ACS flow data I came up with 2,364,075 resident workers for Cook County. Setting the visualization tool to show trips between zero and 300 miles (its minimum and maximum possible) I got 977,059 resident workers. So according to my calculator 1,387,016 workers live in Cook Country Illinois and travel more that 300 miles to go to work daily. Once I find the location of these workers I will be looking for investors to help me privately build a high speed rail line ;-) In a separate email I invited the creator of the visualization product to join this listsever and sent him the link to its archive. While many of us are data people and want to understand what the data represents before advising decision-makers or drawing conclusions, I applaud this product. I think this is only one small example of what can be done with the data and hope that he will join the discussion. We need more products like this and there is whole community of "data people" out there who can help with data side. On 5/26/2016 11:47 AM, ALANPISARSKI wrote: Yes I noticed also - very strange. From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Weinberger Penelope Sent: Thursday, May 26, 2016 10:12 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: Re: [CTPP] CTPP animation map (Not CTPP, actually) I would be cautious, just did a quick check, it says ACS, but unsourced as to what ACS (I'm guessing 2009 - 2013 county to county flows - otherwise OD pairs are very tricky), also looking at just Montgomery county and DC, and expanding the tool to its maximum range (zero to 293 miles) it's missing about half the total workers in each of those. Also, tracts are referenced, but that set is not reported at tract. I welcome your thoughts. Penelope Z. Weinberger CTPP Program Manager AASHTO 202-624-3556 ctpp.transportation.org From: ctpp-news-bounces(a)chrispy.net<mailto:ctpp-news-bounces(a)chrispy.net> [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Nancy Reger Sent: Wednesday, May 25, 2016 4:08 PM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Subject: [CTPP] CTPP animation map Check out this CTPP animation map - we didn't make it. It's very cool, wish we had- http://bigbytes.mobyus.com/commute.aspx Nancy Reger, AICP Director, Data & Mapping | Mid-Ohio Regional Planning Commission T: 614.233.4154 | M: 614.228.2663 | nreger(a)morpc.org<mailto:nreger(a)morpc.org> 111 Liberty Street, Suite 100 | Columbus, OH 43215 _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> https://www.chrispy.net/mailman/listinfo/ctpp-news -- Ed Christopher Transportation Planning Consultant 708-269-5237