Sure. Every car might be a cab!
Here's the story. For four days, I've never took a taxicab in Moscow. For four days my guides used the following routine instead: raised a hand towards the cars riding on the first lane of the highway/boulevard/street and a car (often two or even three) stopped. After a very short negotiation we jumped in and we're gone. Money changed hands, relaxed chatter happened between the fronts sits (in Russian) and eventually we were delivered at the destination.
They were not cabs. They were not previously hired rides. It was all kind of paid hitch-hiking!
You can use any car as a taxi
—It would take 30, maybe 45 minutes for a cab to show up with these traffic jams, they said. And who cares about taxicabs, anyway? We have our own scheme. You can use any car as a taxi. 100% efficient: no phone calls on hold, no waiting. Arm raised, cars stop. Better.
—Well, I replied, every capital has taxis and I never — not ever — seen something like this.
—Yes, but this is Moscow, they replied. This is our way.