Why may a bus need extra room when turning left?

1. The front axle follows a tighter path than the rear axle as steering lock is increased
2. The rear wheels cut in toward the kerb and the rear overhang can swing outward
3. The front overhang is the main concern because the rear wheels follow the front-wheel path
4. The rear body follows the rear-wheel line, so clearance is needed mainly on the nearside