I want to clear this up once and for all.
Although that will probably never happen.
Taxi drivers (or "cabbies") do NOT make their money on mileage, taking you the long way around, or wasting time at traffic lights on the strip.
They make their money on tips, and they get stiffed a lot of the time.
It's in their best interest to pick up as many fares as they can.
A lot of them work 12-14 hour days.
They know the shortest or quickest ways from point A to point B.
Las Vegas strip is not that large.
I've seen more jerks driving shuttles than I ever have a taxi driver.
And the "tunnel" is just an entrance to I-15.
Which is just as quick or better than going down Koval.