"always SEARCH to solve problems"
That´s what i do all the time. That´s why i suggested to use the viewer and wait for the right moment to shoot.
This is the ONLY way.
As Anderew mentioned already: you can build a rig to place the camera high enough to shoot the car from above the
pedestrian´s heads - but:
1) you´ll see the rig in the soots of course.
2) it´s endangered being thrown over by the crowd.
3) it takes much time to place and to move it. Maybe having 5 assistants . .
But of course you also might ask the police to ban all pedestrians from the site you´re shooting . . .
This threah starts with a solution (making don't visible backside).
Yes - and i provided the solution in my first answer . . . and showed an example.
Then I don't see any solution of people always between camera and cars.
This one was also answered.
"many excellent panos in crowed places" .. yes. Sure. But I never seen yet solution of problem of "60 panos in 1 hour". Probably there isn't?
There isn´t. Forget it. Also answered already.
I think many shots for view of cars (not bracketing), shooted manually for best ( but partial) view.
It remain some problem for automated stich to avoid photoshop.
Again: look through the viewer and wait for a good moment to shoot. Place the camera in a way you only need ONE shot for the car.
There is no other solution for your problem.
I also explained the automated stitch.
Sometimes you remind me of the man who walks in the rain and complains getting wet - but don´t like to use an umbrella because
that´s "too uncomfortable" . . . . .
P.S.: what in the world at all made you think doing 60 panos of this kind in a day??