Assessing MoDOT's Efforts fo Provide the Right Transportation Solution

Heartland Market Research LLC sampled opinions on a variety of MoDOT projects across the state. A small, mediuim and large project from each of the seven MoDOT districts was selected by a regional manager. A total of 21 projects were identified. Each survey was focused on an individual project which was briefly described in the survey. Most survey questions were related to the recently completed project, asking if the completed project increased safety, convenience, and made it easier to drive.

Title: Assessing MoDOT's Efforts to Provide the Right Transportation Solution

Published: January 2014

Report number: cmr 14-006

Project number: TR201234

Author: Lance Gentry

Performing organization: Heartland Market Research LLC

Evaluation of J-Turn Intersection Design Performance in Missouri

Research shows that a high percentage of crashes that take place on high-speed rural expressways occur at intersections with minor roads. One low-cost alternative design for improving the safety of at-grade intersections on such expressways is the J-turn. In the last few years, the Missouri Department of Transportation has converted some two-way stop controlled (TWSC) intersections into J-turns. This study evaluated the effectiveness of the J-turn intersection design in Missouri utilizing field studies, a public survey, crash analysis, and traffic conflict analysis. The J-turn design resulted in a 34.8% reduction in crash frequency for all crashes and a 53.7% reduction in crash frequency for all injury and fatal crashes. None of the five sites exhibited a fatal crash following J-turn implementation.

Title: Evaluation of J-Turn Intersection Design Performance in Missouri
Published: January 2014
Report number: cmr 14-005
Project number: TRyy1304
Author(s): Praveen Edara, Carlos Sun and Sawyer Breslow
Performing organization: University of Missouri-Columbia, Dept. of Civil Engineering