Final answer:
A U-turn can usually be started from the left-most lane when a left turn can be made from two lanes, to allow for the necessary turning radius and to prevent interrupting other traffic flows.
Step-by-step explanation:
When an intersection allows a left turn to be started from either of two lanes, a U-turn can typically be started from the lane further to the left. A U-turn can usually be started from the left-most lane when a left turn can be made from two lanes, to allow for the necessary turning radius and to prevent interrupting other traffic flows.
This is because the U-turn requires a wider turning radius and starting from the left-most lane usually prevents impeding traffic that intends to continue straight or make left turns from the adjacent lane. Local traffic laws vary, so it is essential to consult the specific traffic regulations of your area.