Systematic Identification of High Crash Locations
Minutes of Project Advisory Committee Meeting - 5/4/00 - 10:00
The second meeting of the HCL PAC was held at 10:00 AM on Thursday, May 04,
2000 at CTRE. The individuals presented were:
- Mark Perington, Snyder and Associates
- Bob Sperry, Webster County Engineer
- Bill Schuman, Iowa DOT
- Reg Souleyrette, CTRE
- Ali Kamyab, CTRE
- Keith Knapp, CTRE
- Aemal Khattak, CTRE
- Zach Hans, CTRE
- Michael Pawlovich, Iowa DOT
The purpose of the meeting was to report the projectís current status to the
committee and layout our research strategy in the next quarter.
Reg welcomed the committee members and indicated that we spent less than 1/3
of the budget in about 4 months. Next, Ali and Zach presented the strategies
that the research team had developed for identification of horizontal curves.
- Bob suggested that adding countiesí maps showing high accident locations
and curves on the projectís web site would be very beneficial. This can also
be advertised through Steve De Vries at the ICEA Service Bureau.
- According to the Task 3 of the project proposal, an integrated database
was proposed to be developed. It was indicated that the current engagement
of both Iowa base records and crash records to calculate crash rates is an
indication of integrating databases.
- Bill indicated the "Length" strategyís scripts in Arcview and
Geomedia are both suitable in the Iowa DOT database systems.
- The research team will conduct the following three tasks before the next
- Select a strategy, potentially the "Length" method, to identify
horizontal curves. To determine the location and length of a curve on a
string, Michael Pawlovich will develop an Arcview script in which actual
and end-to-end lengths of defined intervals will be calculated [i.e., "Length
(defined interval)" method]. The script is expected to be developed
by May 18,2000.
- Produce results (accident locations, crash rates as well as statistics
analysis of data) for the four selected topics for at least one county.
- Provide recommendations for the long-term maintenance of Iowa DOT database
(i.e., recommendations for permanent application in the Iowa DOT).
- Zach will investigate to see if there have been any changes in roadway designs
during the past ten years. This will enable us to provide a more accurate
statistical analysis of the involved parameters in accident occurrences at
a particular roadway (e.g. shoulder width changes).
- Aemal will be provided with accident and related roadway data to determine
the significance of the involved parameters (e.g., road conditions, driversí
age and gender, etc.)
- A progress report will be presented at the next IHRB meeting (June or August)
- The next committee meeting will be formed within the next three to four
The meeting adjourned at 11:10 AM.