Step 1: Recall the definition of weaving section.
A weaving section is the roadway between two successive entry and exit points in a rotary where vehicles merge and diverge.
Step 2: Identify the required length.
The length of this section is called the
\[
\boxed{\text{Weaving Length}.}
\]
Hence,
\[
\boxed{(C)}
\]
is the correct answer.