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A freeway segment has the following characteristics: 3 lanes in each direction Lane width = 11...

A freeway segment has the following characteristics:

  • 3 lanes in each direction
  • Lane width = 11 ft
  • Right shoulder width (lateral clearance) = 4 ft
  • There is 1 interchange within 3 miles downstream, and 2 interchanges within 3 miles upstream.
  • The freeway is located on a level terrain and has 10% of heavy vehicles in the traffic stream.

Calculate the free-flow speed (FFS) for this freeway segment using the HCM formula
(FFS = 75.4 – fLW – fLC – 3.22TRD0.84).

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