The analysis of existing and future operating characteristics of a
roadway can be measured using Level of Service (LOS) to provide an
indication of the ability of the roadway to satisfy both existing and
future travel demand.
LOS is a quantitative measure of the quality of service of a
transportation facility. The LOS measure is broken down into six
letter grades, “A” through “F” with “A” being the best and “F” being
the worst. LOS measure of D/E is considered the lowest acceptable
rating for an intersection.