California and Nevada would see a number of interstate improvements. The map below shows these various improvements. Solid Blue Lines indicate new free and purple indicates toll interstate routes. Dotted lines show additional Proposed routes or alternative routes. Red and Green (toll) lines show existing Interstate highways. Click on a shaded region below to view more detailed information about interstate ideas for that area

Interstate 9 - California/Nevada
Description This interstate begins at the current I-5/SR-14 junction in Santa Clarita and continues north through Lancaster and eventually continues north onto existing US-395 passing near Ridgecrest on its way to Bishop CA. From there I-9 would follow the US-6 alignment heading into the state of Nevada where it would travel on a new alignment generally following along NV route 360 and ending at the planned I-11 West of Tonopah near the existing US 95 and NV-360 turnoff.
Purpose and Need Due to the high volume of truck and commercial traffic along this corridor this road needs to be upgraded to interstate standards. This would also provide direct interstate access from the Greater LA and San Diego regions to the inter-mountain cities such as Reno and Boise.
Alternate Routing An alternate routing would keep this highway following the US-395 north of Bishop to Reno replacing I-580 and possibly even extending the route northward to reach Susanville, Klamath Falls and beyond if needed.
Another alternative is to keep the planned route to I-11 and then north of Hawthorn I-9 would then split off to the west toward Yerington and Minden along the ultimate inserstate I-580 extension to Reno (thus replacing I-580) and as in the other alternate route I-9 could still continue northward from Reno if needed.
Interstate 11 - Nevada
Description Originating from Gila Bend, Arizona I-11 travels north into Nevada crossing the new Colorado River Bridge near the Hoover Dam. This interstate would replace existing US-93 and I-515 south of Las Vegas. North of Las Vegas the route will generally follow US-95 northward throughout the state north through Fallon. I-11 would be cosigned with I-80 from Fallon Junction to Winnemucca before continuing north along US-95 into Oregon. Eventually the route continues north toward Boise and Lewiston eventually ending in Spokane.
Purpose and Need This corridor solves several transportation issues. First it provides a connection from Phoenix to Las Vegas, Connects Las Vegas to Reno, and connects Sacramento and Reno to Boise and points north. Additionally there is a high volume of truck and commercial traffic along several sections of this corridor.
Alternate Routing Near Hawthorne Nevada instead of turning north directly to Fallon NV the route could continue northeast on a new alignment generally following the state border with California ir the ultimate interstate planned extention of I-580 and then follow US-395 to Reno where it would be Cosigned with I-80 back to its original alignment towards Winnemucca. The I-11 section heading Due north through Fallon to I-80 would then become the I-211 bypass.
I-11 could also take a more direct northerly path through the heart of Nevada traveling around various military ranges and then directly to Winnemucca where it continues north to Oregon and Idaho. This routing would reduce mileage however it travels through largely uninhabited lands and is not a practical routing to connect Phoenix or Las Vegas to Reno.
North of Winnemucca I-11 could take amore direct northeasterly route directly to Boise, however consruction costs of such a new terrain highway would be likely astronomical and negate any savings of the more direct route. Additionally upgrading the existing route would significantly improve travel times.
Interstate 70 Extension - Nevada
Description From its existing terminus in Utah, this interstate would generally follow existing US-50/6 route to Ely. From there the interstate would continue west along one of two possible routes. From Ely the northern route follows along US-50 to Fallon and then ends in Fernley terminating at I-80. The southern route would generally follow US-6 toward Tonopah and Bishop connecting to I-11 and ending at I-9 where at some point it could be extended westward into California as a second interstate route to the California Central valley and Bay Area region.
Purpose and Need To promote interstate continuity and provide a link to the current west end of I-70 for several major cities such as Reno, Sacramento and the Bay Area.
Preferred Routing Since the likelihood of traversing the central Sierra Nevada mountains is low due to the high elevations and associated construction costs the southern route is likely impractical. Favoring the northern route is preferred even though the route travels through largely desolate areas on its way westward. Despite this the additional connection to existing I-70 to points west makes this highway justifiable
Interstate 580 Extension - Nevada
Description This interstate would extend I-580 southward from Carson City to Minden and Gardnerville where it would turn eastward and connect to the ultimate interstate I-11 north of Hawthorne.
Purpose and Need Continuity with the existing interstate system. And to connect Reno and Carson City (Nevada's capital) to Las Vegas and Phoenix.
Notes This route could also serve as a northward extension of ultimate interstate I-9.