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A segment of Class I two-lane highway has the following known characteristics: • Demand Volume =...

A segment of Class I two-lane highway has the following known characteristics:
• Demand Volume = 1800 pc/h, total both directions
• Directional split 60/40; PHF = 0.90
• 50 % no-passing zone; Rolling Terrain
• 15% trucks; 5% RVs; 10 ft lane widths
• 5 ft shoulders; 25 access points /mile
• BFFS = 55 mph;
Determine the FFS and BPTSF for the highway segment

engineering   Civil-Engineering   
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Answer #1

Deciand Volure pehBot Dnitiono, 1S00 PH 0.9 20%no-Pad>ing Z0ne Rolling Terrain ISy Tovcks 5%RVS 10ft Qane widLh shoulles SAE

Free Flow Sped, FFS= BFFS-hs A 55-9.4-6.35 46.35 mph Aveage 13avel sped ATS= FFS 0.007 Vps-Fap 46.35- 0.0076 x1309 - 0.85 0.6

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