Number of Lane Needed for LOS C. An urban freeway has 2 lanes in each direction, but must have lanes added in what is now a median so that 5249 vph in one direction can be served at LOS C. There are 8 percent trucks and the posted speed limit is 65 mph. The terrain is level and 5ft of right-side lateral clearance can be provided. Ramp density will be 1.8 ramps mi. Using PHF -0.95, how many 12- f-wide lanes will be needed to achieve LOSC on the freeway? If any data are missing. adopt default values from Table 3.3. Assumption-Based on your knowledge of capacity of a single at a speed of 65 mph, how many lanes would be needed to service 5249 vehicles per hour in the peak direction? N assumed
Step 1 - Calculate FFS fiw fic FFS
Step 2 - Calculate v f f
Step 3 - Calculate D
Step 4-Determine LOS LOS =
Based on the outcome of your assumption, how many lanes in peak direction are needed? N required =