Q:

What is the free-flow speed (FFS) of a multilane highway?

A) FFS = BFFS-flw-flc-fm-fa B) FFS = BFFS+flw-flc-fm-fa
C) FFS = BFFS-flw-flc-fm+fa D) FFS = BFFS-flw+flc-fm-fa
 

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