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Comprehensive Plan Transportation Element • Major road improvements in the southern portion of the county include Oslo Road (from I-95 to Old Dixie Hwy) to four lanes, the I-95/Oslo Road interchange, east/west roads (8th Street, 16th Street, 26th Street, 53`d Street, Aviation Blvd), and north/south roads (43`d Avenue, 58th Avenue, 66th Avenue). • Major road improvements in the northern portion of the county include CR 512 (from I- 95 to Roseland Road) to four lanes, CR 510 (from CR512 to US 1) to four lanes, Barber Street (from US 1 to Schumann Drive) to three lanes, Schumann Drive (from CR 510 @ 66th Avenue to Barber Street) to four lanes, and the extension of Laconia St to CR 510. An analysis of the system -wide impacts of the adopted Cost Feasible Plan appears in Table 4.9.2. These statistics represent system -wide comparisons, and include volume/capacity ratios, total accidents, and pollutant emissions* During the course of developing the Cost Feasible plan, the MPO considered several alternatives to road widening in response to public comments and potential impacts to surrounding neighborhoods. Two examples of this were the consideration of alternatives to widening 27t and 43rd Avenues. Currently, the county explores alternatives to widening major thoroughfares when those thoroughfares would intrude into existing residential neighborhoods. While the county will consider reasonable mitigation and/or alternatives to road widening, it is also the policy of the county to maintain its adopted level of service standards. In the fall of 2004, the Board of County Commissioners (BCC) considered several programmed roadway improvement projects. During the public involvement phase of the roadway development process, a considerable amount of citizen opposition to two of those roadway projects — the 43`d Avenue and 27th Avenue —arose. Both 43rd Avenue and 27th Avenue are two- lane undivided facilities that were proposed to be widened to five -lane facilities. The proposed widening projects were perceived as leading to higher volumes of traffic, higher travel speeds, increased noise levels, and reduced safety. In order to maintain the adopted level of service while also maintaining the quality of life of the residents in south Indian River County, the county explored a number of alternatives to five- laning 43`d and 27th Avenues. These alternatives included three-laning 43rd and 27th Avenues; establishing new roadway alignments; and widening parallel facilities. In addition, an analysis was conducted to determine the feasibility of maintaining adequate levels of service through expanded transit service on the facilities. In performing the analysis of alternatives, the county employed a number of quantitative techniques, including regional travel demand modeling using FSUTMS on the adopted Treasure Coast Regional Planning Model network. o Roadway Alternatives One analysis that was performed evaluated the impact of three-laning, as opposed to five-laning, 43rd and 27th Avenues. According to the Generalized Level of Service Tables contained in FDOT's 2002 Quality/Level of Service Handbook, dividing an undivided facility generally Community Development Department Indian River County 69