There was no free transfer between the inner loop and the outer loop platforms.

When loops are nested, an induction variable in the outer loop can be a loop invariant in the inner loop.

The layout has two main loops: the outer loop passes over the tunnel and the inner through it.

There are now four multiplications within the outer loop that increments r1.

Buses and trolleybuses entered the outer loop in a clockwise direction, so their doors opened onto the outer edge of the crescent shaped structure.