Analysis Concepts The analysis methodology considers several roadway and traffic concepts, described as follows.
Segmentation A two-lane highway is divided into segments for analysis purposes. The ability to pass, lane geometry, grades, lane and shoulder widths, posted speed limits, traffic demands, adjacent land uses, driveways, and other characteristics of the facility should be homogeneous within each analysis segment. Note that segmentation will be different for each direction of the highway because passing zones and other characteristics will start and end in different locations depending on the direction of travel. The results of each segment analysis are then combined into results for the full highway.
The analysis methodology can be used to analyze individual homogeneous segments of a two-lane highway, as well as extended lengths of a two-lane highway that are composed of multiple contiguous segments.