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Comprehensive Plan Transportation Element Level of Service A - Uninterrupted flow - No restriction on maneuverability - Few or no delays Level of Service B - Stable flow conditions - Operating speed beginning to be restricted Level of Service C - Speed and maneuverability restricted by higher traffic volumes - Satisfactory operating speed - Delay at signals Level of Service D - Low speeds - Major delays at signal - Little freedom to maneuver Level of Service E - Lower operating speeds - Major delays and stoppages - Volumes at or near capacity Level of Service F - Low speeds - Stoppages for long periods because of downstream congestion For planning purposes, the level of service for a roadway link is determined by comparing the link's traffic volume to its roadway capacity. Generally, level of service calculations are determined using guidelines established in the latest edition of FDOT's Level of Service Handbook. Alternatively, level of service can be determined using other methodologies, including ART -Plan analyses, speed -delay studies or the Highway Capacity Manual method. In Indian River County, level of service "D" is the minimum accepted standard during peak hour, peak season, peak direction conditions. The peak hour/peak season parameter is considered the 100th highest hour of traffic activity during a year. In 2005, the Board of County Commissioners (BCC) changed the level of service standard to "E+20%" on 27th Avenue (from the south county line to SR 60) and on 43rd Avenue (from Oslo Road to 16th street). This was done in response to citizen opposition to proposed widening projects on those roads. Since level of service "D" on those roads was not possible without the widening, the county instead reduced the level of service standard on those roads. Since that time, the board has determined that LOS "D" should be maintained on those roads, and the road widening projects are now included in the Comprehensive Plan. Therefore, the "E+20%" standard will be changed back to LOS "D" when the four lanings are programmed in the first three years of the Capital Improvements Program. Safety Crash data for 2005 are included in Table 4.2. In 2005, the intersection of 17th Street and US 1 had the highest,number of crashes, with 23 crashes recorded. At that time, the locations with the highest relative crash rates were 21' Street at 8th Avenue with 6.25 crashes per Million Entering Vehicles (MEV) and 21st Street at 5th Ave (4.37 crashes per MEV). In 2005, there were 1,522 crashes and 32 fatalities on Indian River County's roadways. That corresponds to a rate of approximately one crash per 2,800 vehicle miles traveled. In per capita Community Development Department Indian River County APPENDIX A — Transportation Amendments 11