A Case Study Illustrating Traffic Signal Removal as an Acces资料.pdf

文档介绍：Plazak and Preston 3rd Urban Street Symposium 1
June 24-27, 2007 Seattle, Washington


Minnesota CSAH 42:
A Case Study Illustrating Traffic Signal Removal as an Access
Management Strategy

CORRESPONDING AUTHOR: David J. Plazak- Iowa State University
Center for Transportation Research and Education
Iowa State University
2711 South Loop Drive, Suite 4700
Ames, Iowa USA 50010-8664
Phone: [phone] Fax: [phone]
******@

CO-AUTHOR: Howard Preston – CH2M Hill, Inc.
1295 Northland Drive
Suite 200
Mendota Heights, MN 55120
Phone: [phone] Fax: [phone]
hpreston@


Abstract
County State Aid Highway (CSAH) 42 is a major east-west arterial serving the southern
suburbs of the Twin Cities metropolitan area in Minnesota. This corridor represents an
excellent case study in both how not to and how to manage access along a major
suburban arterial.

The existing highway corridor configuration was developed over a number of decades
and illustrates a number of poor access management practices. These include:

• Lack of coordination among local government jurisdictions (including two
counties and two cities) along the corridor both in terms of traffic engineering and
land use planning;
• Over-reliance on traffic signalization as a solution to traffic operations and safety
issues along an arterial corridor. Traffic signals were added incrementally to
address spot operational and safety issues. Eventually, the entire system
functioned poorly due to the resultant close signal spacing;
• Lack of planning for alternative access to land development. prehensive,
interconnected system of backage or frontage roads was never developed for this
roadway. In fact, land development was allowed to occur at locations that would
have been ideal for the placement of backage roads;

An access management project currently underway along the corridor