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CULP 2011-048

June 10, 2011

Innovative diverging diamond design will be the first in Va.

CULPEPER — Reconstruction of the Interstate 64 interchange on Route 15 (exit 136, Zion Crossroads) in Louisa County is the subject of a June 22 public hearing hosted by the Virginia Department of Transportation (VDOT). The hearing will take place from 5 to 7 p.m. at Best Western Plus, 135 Wood Ridge Terrace, Gordonsville, VA 22942 (just north of the interchange).

VDOT proposes to reconstruct the 0.49-mile stretch where Route 15 meets I-64 as a diverging diamond interchange (DDI). By briefly shifting vehicles to the opposite side of the road, this innovative interchange design eliminates traditional left turns that must cross over oncoming traffic. The DDI improves safety by reducing the number of spots where vehicles could collide, and can handle more than 600 left-turn movements per hour, twice the capacity of a conventional interchange.

In 2007, VDOT identified a need to increase the capacity of the I-64 off-ramps at the Route 15 interchange, which—combined with a forecasted increase of traffic due to the area’s commercial growth—prompted a study of potential interchange options. In addition to the DDI, VDOT analyzed the construction of a single-point urban interchange, improvements to the existing diamond interchange, and a no-build alternative. The clover-leaf interchange was not included based on the amount of land acquisition it would require. Overall, the DDI produced the best results based on today’s traffic volumes as well as those projected for 2035.

The diverging diamond interchange is new to the U.S. Though the design originally appeared in the 1970s in Versailles, France, America’s first DDI was built in 2009 in Springfield, Missouri. Since that time, two others have been completed in Missouri, as well as one each in Utah and Tennessee.

The project’s estimated cost is $7.95 million in federal funds and is subject to change as the project’s design is developed. Construction is anticipated to begin by 2012.

Project plans and environmental documents, as well as right of way and easement information, will be available for review at the public hearing, as well as at VDOT’s Culpeper District Office located at 1601 Orange Road, Culpeper, VA 22701; or at VDOT’s Land Development Office located at 11430 James Madison Highway, Gordonsville, VA 22942, 1-800-FOR-ROAD (367-7623). Please call ahead to ensure that personnel are available to answer your questions.

VDOT staff will be available during the hearing to discuss the project and answer questions. Written and oral comments will be taken at the hearing. Written comments can also be submitted by July 5, 2011, to Mr. James S. Utterback, PMP, Culpeper District Administrator, 1601 Orange Road, Culpeper, VA 22701.

VDOT ensures nondiscrimination in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964. For additional information or assistance, contact VDOT’s Culpeper District Office of Equal Opportunity, 1601 Orange Road, Culpeper, VA 22701; telephone 540-829-7525, TDD/TTY 800-307-4630 or 711.


Information in VDOT news releases was accurate at the time the release was published. For the most current information about projects or programs, please visit the project or program Web pages. You may find those by searching by keyword in the search Virginia DOT box above.

Page last modified: Oct. 17, 2012