Subproblem 5a  Page 2 of 3 
ID# C105A02 
Subproblem 5a: Existing
Analysis of 10Mile Segment of U.S. 95
Step 2: Setup
What data are required for the
analysis? We
want to determine the LOS that drivers experience on the
existing 10mile section. The analysis methodology contained in Chapter 20
of the HCM is applicable, and the following data are needed to conduct an
operational analysis:

geometric data 

demand volumes for each direction 

free flow speed 
Today, the average daily traffic on U.S. 95 is about 600 vehicles
per hour (both directions).
Insofar as the input parameters are concerned, we’ve found from field
studies that the
shoulder widths are 6 feet, the lane widths are 12 feet, and the
directional split is 54% southbound/46% northbound, consistent with the
southbound side of the StynerLauder intersection
that serves as the northern border of this corridor. The peak hour factor (PHF)
is set to the HCMrecommended default value of 0.88, the percentage of trucks and buses is 10%, and
there are no recreational vehicles. The base freeflow speed is 60 mph,
the percent nopassing zones is 30% and there is an average of 2 access
points per mile (an access point is a street, a driveway, or a curb cut that is significant in terms of traffic operations.)
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