Most Strip casinos are huge enterprises that encompass several city blocks. As such, they’re serviced by private access roads that are intentionally well-hidden from patron view and specifically designed to accommodate large delivery vehicles. For casinos on the west side of Las Vegas Boulevard, Industrial Road serves as this corridor; on the east, it's Koval Lane. In addition, deliveries are often made during slower periods when traffic is at its lightest, like the wee hours of the morning.
This also applies to money supplies. Most cash arrives at the casinos in the pockets of their patrons, but occasionally additional cash reserves are called for. A Nevada law dictates that a casino must have enough cash on the premises to pay off all of its (potential) winners. So, in the unlikely -- but statistically possible -- event of all the big cash jackpots being hit in one night, together with some large wins at the tables, in theory the casino needs to be able to cover it.
However, if business happens to be slow for a few days, or there's a busy holiday weekend coming up, or the casino does get hit by some really big wins, those reserves may dip below the anticipated "safe" level and extra cash will need to be brought in, by armored truck, from the Federal Reserve Bank. Similarly, if there's a tournament taking place with, say, a $1 million cash prize, part of the marketing hype usually revolves around letting people get to see all that loot (even though the winner will actually receive a check). So again, the casino may be obliged to bring in extra cash for the day of the event. And, of course, the profits need to be banked regularly, so large cash sums also leave the casino on a weekly basis, again under armed and armored protection.
But this whole process is done as secretly as possible, and under the watchful eyes not only of highly trained security and surveillance staff, but also of a host of state-of-the-art closed-circuit television cameras. Consequently, to the best of our knowledge there hasn't been a successful armored truck heist at a Las Vegas casino since Oct. 1, 1993, when a Loomis truck was robbed of almost $3 million by its driver as part of a well-planned inside job. (The FBI confirms that the two subjects responsible for this robbery are still at large today, 12 years later.)
