Todd-- I have done lots of license plate OD work in the early 1990s and then
managed a contract for an external survey around 1997. For the external it
was tricky because we had to deal with several states when it came to
license plate matching. Each state had different rules and each introduced
methodological concerns. Running down the line, in Illinois we at CATS
bought the files from the state and did the matching ourselves. We had a
lot experience with the files. In Wisconsin our consultant got the files
from the state. did the matching and it was relatively easy. In Indiana the
consultant was supposed to get the files but I had to get involved as the
public agency and got through a process where Indiana did the matching and
sent address files to us that then needed processing. The bottom line is
that it was a mixed bag but dealing with multi states does take planning
In general, external surveys are not easy and the real work is done in the
planning stage. If you get close to work and want to know whats going on you
will certainly have heartburn. However, if you hire someone and don't look
too closely you will get fine data set. I probably got to close to mine....
Todd Ashby wrote:
We are in discussions about doing an external survey
here in KC and have
had the same concerns brought up. May look at license capture.
Anyone done one of those recently?
R. Todd Ashby, AICP
Assistant Director of Transportation
600 Broadway, Suite 300
Kansas City, MO 64105-1554
[mailto:email@example.com] On Behalf Of Ed Christopher
Sent: Thursday, July 21, 2005 7:38 PM
To: Elaine Murakami; Jonette Kreideweis; ABJ30 Members List
Subject: [ABJ30] external travel surveys
sometimes our surveys do not quite go the way we planned.
19900 Governors Dr
Olympia Fields, IL 60461