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LEVEL OF SERVICE A - Uninterrupted flow No restriction on maneuverability - Little or no delays - Stable flow conditions - Operating speed beginning to be restricted LEVEL OF SERVICE C - Speed and maneuverability restricted by higher traffic volumes Satisfactory operating speed for urban conditions Delay at signals LEVEL OF SERVICE D - Low speeds Major delays at Little freedom signals to maneuver Lower operating speeds Volumes at or near capacity Major delays and stoppages LEVEL OF SERVICE F Low speeds Stoppages for long periods because of downstream congestion The level -of -service for roadway links is determined by comparing the traffic volume to the roadway capacity. The result is used to identify the LOS. In Indian River County, LOS "C" is considered the minimum accepted standard for rural principal arterials and rural freeways during peak hour/peak season and peak direction conditions. The peak hour/peak season parameter is considered the 100th highest hour of traffic activity during a year; however, peak hour/peak season is generally regarded as comparable to the 30th highest hour of traffic activity during a year established by FDOT. During peak hour, peak season, peak direction conditions, level of service "D" is the minimum accepted standard for all other freeway, arterial and collector roadways. In calculating level of service, the county uses the latest edition of FDOT's generalized tables showing the level of service maximum volumes for urban/urbanized areas. The county uses the FDOT generalized tables applicable for state roadways in performing level of service calculations for roadways under state and county jurisdiction. The relationship between number of lanes, capacity and level of service is provided in Table 4.1. These planning capacities were derived from the latest edition of FDOT's Generalized Daily Level of Service Maximum Volumes for Florida's Urban/Urbanized Areas default tables. The portion of Table 4.1 relating to state roadways in applicable to all roadways in Indian River County, since the county uses this portion of the table in its level of service calculations. The capacities used in the Florida Standard Urban Transportation Model Structure (FSUTMS) model reflect typical arterial conditions, where traffic entering and existing driveways as well as local intersection operations impede the free flow movement on the roadway. Conceptually, there are no such impedances on a bridge, and as a result, bridge capacities are usually higher than arterials. However, this greater capacity is not that meaningful within the context of overall operating conditions of a road.