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The I-15 or Interstate 15 (and on some occasions called the Long 15) is a freeway in the Mojave Wasteland in 2281.


It used to serve vacationers and commuters alike before the Great War, running alongside Highway 95, connecting Los Angeles and Las Vegas.[1] By 2281, the New California Republic patrols the Ivanpah Valley stretch of the interstate, attempting to protect fledgling communities dotted alongside it from creatures and criminals.[2][3][4]

However, despite NCR interference, a recent prison break resulted in I-15 closing down to caravaneers and merchants, forcing them to either stay stranded at Mojave Outpost or find other locations from which to do businesses.[5][6][7] As a result, those towns situated on Highway 95 see an influx of traffic and accompanying business.[8]


Joshua Graham mentions traveling along the interstate on his way into Arizona.[9] The roadway enters the area from the southwest corner of the map and travels northeast toward the Mojave Outpost before passing by the Ranger Unification Treaty Monument. At the foot of the hill, it meets Nevada 164 and then travels alongside the Ivanpah Dry Lake to Primm and the California Sunset Drive-in. Before turning northeast, it meets Nevada 160 near Jean Sky Diving.

The highway then runs parallel to the western train tracks as it leaves Powder Ganger territory into Sloan. Continuing northeast, it bypasses Quarry Junction and Black Mountain, leading to the Junction 15 railway station. Deathclaws overrun the part of the highway between Sloan and the railway station. The road turns right at Hunter's farm, then turns north again as it enters Fiends territory. The Samson rock crushing plant, New Vegas Steel and the west pump station are all built alongside this part of the freeway, and nearby staircases must be used to leave the freeway to get to them. As an important division between Fiend territory and the NCR base at Camp McCarran, this section of the highway is sporadically defended with frag mines littered along the road and on certain staircases.

Once the highway reaches just south of New Vegas, it rises out of the trench to become a heavily damaged elevated freeway that cannot be traversed. From here, the freeway continues above parts of Westside, turning east through Freeside where it merges with Highway 93 at a destroyed intersection. Once it leaves the New Vegas area, it turns north outside the western edge of Nellis Air Force Base. The south cistern, Freeside's north gate, and Fields' shack are all built under this section of the freeway.



I-15 appears only in Fallout: New Vegas, and is mentioned in its add-ons Honest Hearts[11] and Lonesome Road.[12] It also appears on an early version of the game's map.[13]

Behind the scenes

Interstate 15 is based on the real world Interstate 15.



  1. "Two major routes lead into the city of New Vegas from the south: Interstate 15 and Highway 95."
    (Fallout: New Vegas loading screens)
  2. The Courier: "Tell me about Primm."
    Primm Slim: "Primm is a thriving resort community located in Clark County, Nevada, right along Interstate 15. Whether you can't wait 'til Vegas to try your luck, or want to hit one last jackpot before you leave Nevada, Primm's your place! The town's Primm-eer attraction is the world-famous Vikki and Vance Casino and Museum, so you came to the right place, pardner!"
    (Primm Slim's dialogue)
  3. Slide 12: Goodsprings:"Goodsprings saw more trade along I-15 after NCR gained control of the Mojave Wasteland, but with that came a heavy burden of the Republic's taxes. Some old-timers, unable to handle the cost, were forced to move on, grumbling all the while."
    (Fallout: New vegas ending slides)
  4. Slide 25: Primm:"After Hoover Dam, NCR helps rebuild Primm as a major stopping point on the Long 15. Though Primm's citizens chafe under NCR's taxes, they benefit greatly from the increased protection and merchant traffic."
    (Fallout: New vegas ending slides)
  5. The Courier: "Who are you?"
    Michelle Kerr: "Name's Michelle. My Dad and me run this store. His name's Samuel. I take the day shift and he takes nights. We came here about a month ago, when Primm went to hell on account of the prison break north of there. Found a bin to call home and set up shop."
    (Michelle Kerr's dialogue)
  6. The Courier: " Why's business so good here?"
    Samuel Kerr: "When 15 shut down, 95 became the route NCR citizens use to get to the Strip - or limp back home, after the Strip's drained 'em of caps."
    (Samuel Kerr's dialogue)
  7. The Courier: " Why'd you leave Primm?"
    Samuel Kerr: "Michelle and I ran a little shop in Primm 'till a prison break north of town spoiled it for everyone. Goddamned convicts just about shut down I-15."
    (Samuel Kerr's dialogue)
  8. The Courier: "Have you lived here a long time?"
    Alice McBride: "Oh! Well I'm Alice and you've already met my beau, Dusty. He's sweet, ain't he? I don't care what my mama said, I know how to pick 'em. (Oh! Well I'm Alice and that handsome stranger yonder is my husband Dusty. Going on fifty years, now.) I keep waiting for him to leave me for some young thing with platinum blonde hair and hoop earrings, but he still sticks around. Says it's my cooking. I think it's because I know which Brahmin udder you can milk without getting kicked in the noggin. We set up this ranch years back when Novac was just getting settled. But now with all the danger on I-15, folks are starting to come through here from all over. Novac might just be the next Nevada boom town."
    (Alice McBride's dialogue)
  9. Joshua Graham: "I traveled along the Long 15 and followed 89 south into Arizona. Along the way, I met two men from a group called the Followers of the Apocalypse."
    (Joshua Graham's dialogue)
  10. Slide 7: Brotherhood of Steel:"The Brotherhood and the NCR in the Mojave Wasteland declared an official truce, despite continued hostilities between the two in the west. As per their agreement, the NCR handed over all suits of salvaged power armor and in return the Brotherhood helped patrol I-15 and Highway 95."
    (Fallout: New vegas ending slides)
  11. The Courier: "Why do you need a map of Grand Staircase?"
    Daniel: "Grand Staircase is farther east, deeper into the Colorado Plateau. The White Legs were able to reach us here, but it's only because Zion is close to the Long 15. They can't pursue us east of here. It's too wild."
    (Daniel's dialogue)
  12. The Courier: "The Long 15 is no more. The main supply line into NCR is cut."
    Ulysses: "No damage done, not yet. Maybe in years. Keeps the Bear fenced... if Caesar can't drive it back, fire might. Only delays the end for the Bull, a new wall for them to scale and cross... once they're done with the Mojave. And Hoover Dam. Never again do you or any other courier and caravan need walk that route. Let the Mojave breathe without that asphalt scar raking it."
    (Ulysses' dialogue)
  13. Early map with roadway signage
Fallout: New Vegas roadways