The methodology presented in the modules for this section may be used for the following
- Operational analysis. Known or projected design and traffic variables are used to
estimate LOS, speed, and density of the traffic stream, as demonstrated in the module
entitled "Determining Level of Service and Density". This application is used to
evaluate impacts of alternative designs.
- Design analysis. A forecasted demand volume, known design standards and a desired LOS
are used to determine the appropriate number of lanes needed for a basic freeway section.
The demonstration associated with this module uses a design approach.
- Planning analysis. A desired LOS is used to determine the number of lanes needed. The
difference between a planning analysis and a design analysis is that the design standards
and the specifics of the demand volume may not be known. This application is beyond the
scope of this training module.