damn, the 15 was shut down on Friday in both directions in what started as an incident involving a not really suicidal guy who needed a LOT of attention on an overpass sign near Lake Mead Boulevard. THEN Swat and crisis negotiators responded to the scene.

Initially, the I-15 southbound lanes were closed around 8 a.m. and later the northbound lanes of the freeway were closed, as well.

The closure for I-15 southbound is at the Cheyenne exit and the closure for I-15 northbound is at the Washington exit.

https://www.8newsnow.com/news/local-news/i-15-southbound-closed-at-lake-mead-blvd-due-to-crash/

https://www.ktnv.com/traffic/i-15-reopens-northeast-las-vegas-after-sensitive-police-incident-turns-into-barricade

It turns out the cops haven't learned from others in the news... JUST drive some semi trailers under the jumper, and bingo, no more deadly distance to jump from. Push him off the ledge, let him fall on the semi trailers roofs where cops and EMTs are there to fix a sprained wrist or twisted ankle, and then off to Bellevue to get him some psychology exams and figure out what's driving the guy bonkers. 

All told, this method takes 30 minutes, tops, to get the jumper off the overpass sign, and into handcuffs, and lets traffic get back to being busy