9.2.4.2 Service Volume Tables

LOS can be determined using the generalized service volume tables. The LOS is based on volume and capacity thresholds.
Table 9-3: Data Requirements for Service Volume Tables
Segment Type
Data Required
Freeways (Basic)
  • Urban or Rural designation
  • K-factor
  • D-factor
  • Number of lanes (both directions)
  • Terrain Type (Level or Rolling)
  • Existing or anticipated traffic volumes
Multi-lane Highways (Basic)
  • Urban or Rural designation
  • K-factor
  • D-factor
  • Number of lanes (both directions)
  • Terrain Type (Level or Rolling)
  • Existing or anticipated traffic volumes
Arterial Facilities
  • Posted Speed
  • K-factor
  • D-factor
  • Number of lanes (both directions)
  • Existing or anticipated traffic volumes