You are waiting at a side road intersection on a busy road, and you want to turn left. A large car approaches from the right. You know you'll be able to turn around in time, but you must still wait. What is the reason for this ?
The large size of a car may make it appear as if it is traveling slower than it actually is.
A large vehicle may block your view, preventing you from seeing if another vehicle is passing it.
A large car may have problems steering straight.
The large car may be obstructing other vehicles on its left.