The Road Ahead with RTC: NDOT Changing Exit Numbers on I-580

Published: Apr. 13, 2020 at 3:17 PM PDT
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Last May, the Nevada Department of Transportation provided notification that exit numbers on Interstate 580 from northern Carson City to the Reno spaghetti bowl would change. Since that time, the exit numbers on I-580 through Carson City have been changed. NDOT wants to let the community know that I-580 exit numbers between northern Carson City and the Reno spaghetti bowl are changing.

The current exit numbers range from 43 to 68B, and will be replaced with new, lower exit numbers corresponding with interstate roadway mileage, beginning in Carson City and progressing north to the Reno spaghetti bowl.

Small exit number sign panels at the top of overhead signs will be replaced, as well as roadside exit number signs at each exit, to reflect the new exit numbers. Please keep in mind that the physical roadway exit and road names will remain the same.

First responders will be alerted prior to specific exit number changes, and electronic roadside signs will be placed during exit number sign changes to alert drivers of the change.

The exit numbers are being changed per federal requirements. The federal Manual on Uniform Traffic Control Devices ensures that freeway signs and mileposts are consistent nationwide to convey a clear message and help guide, warn and regulate traffic. Federal guidelines require interstate exit numbers to reflect mileage specific to that corridor. Current I-580 exit numbers reflect U.S. 395 mileage beginning at the Nevada-California state line near Topaz Lake. Now that the I-580 connection from the Reno spaghetti bowl to south Carson City is complete and supersedes the previous U.S. 395 designation, exit numbers are being changed to reflect interstate mileage beginning at the I-580 junction with south Carson Street and ending at the Reno spaghetti bowl.

Information and a map of the future interstate exit numbers are available at


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