For acceptable degrees of congestion, urban freeways, and their auxiliary facilities should generally be designed for Level of Service (LOS) C or better in the design year and can be referred to in the . In heavily developed urban, or urban core contexts, LOS D may be acceptable. In heavily congested areas, other Measures of Effectiveness (MOEs) may include travel time, speed and queue lengths.

In rural areas, LOS B is desirable for freeway facilities; however, LOS C may be acceptable for auxiliary facilities (i.e., ramps, direct connections, frontage roads, and collector-distributor roads) carrying unusually high volumes.