Might be cheaper to widen the highway 15 to total of 8 lanes instead of 4. Can use more biodiesel/electric hybrids buses.
They already have plenty of 24 hour turnaround buses...for the gambling addicted.
Gambling is no longer the major draw to Vegas. They have shows, night clubs, famous restaurants, sports stadiums, machine gun shooting ranges, “gentlemen’s” clubs, concerts, real estate speculation, and sightseeing like Hoover Dam, Valley of Fire, Lake Mead, etc.
One accident, and no matter how many lanes you have, the traffic jam becomes a nightmare under a blaring hot sun.