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4 <br /> Comprehensive Plan Transportation Element <br /> EXISTING CONDITIONS <br /> For traffic circulation purposes, existing conditions relate not only to roadway system <br /> characteristics, but to the county's land use pattern and population/demographic profile, as well . <br /> While these are discussed in detail in the Future Land Use Element and the Introductory <br /> Element, respectively, they also must be discussed in this element. <br /> The county ' s land use and demographic characteristics relate to the various components of the <br /> transportation system. With respect to those components, this section identifies the existing <br /> conditions for the county' s traffic circulation system, the bicycle/pedestrian system, the <br /> ports/aviation system, and the transit system. <br /> Traffic Circulation System <br /> The traffic circulation system is the most important part of the county' s transportation system. <br /> Not only does the traffic circulation system accommodate the vast majority of trips within the <br /> county; it also provides access to land uses within the area. <br /> Inventory <br /> As illustrated in Figure 4 . 2, the county is served by an extensive network of highways and <br /> roadways . Three north-south routes that are continuous through the county are I-95 , US 1 , and <br /> State Road AIA. Indian River Boulevard is a four-lane divided county roadway running parallel <br /> to US 1 in Vero Beach and the unincorporated areas adjacent to the city. This facility, which <br /> extends from the 4th Street/US 1 intersection to the 53rd Street/US 1 intersection, relieves <br /> congestion and facilitates infill land development east of US 1 . <br /> Because of interchanges with I-95 as well as other regionally significant characteristics, SR 60 <br /> and the CR 512/CR 510 corridor are the most heavily utilized east-west facilities . SR 60 is the <br /> main gateway into Vero Beach, providing access to both I-95 and Florida's Turnpike (in <br /> neighboring Osceola County), as well as access to the barrier island. CR 512 connects the <br /> communities of Fellsmere and Sebastian to I-95 , US 1 , and SR 60. In addition, CR 510 <br /> intersects CR 512 and provides access to the barrier island via the Wabasso Bridge . <br /> These major facilities are supplemented by a series of less heavily utilized roadways . All <br /> together, these roadways form a grid system, which relieves traffic congestion on major routes <br /> by providing alternative corridors of travel in both the east-west and north-south directions. <br /> Particularly important in Indian River County is access from the barrier island to the mainland. <br /> Currently, three bridges, two in the Vero Beach area and one in Sebastian, provide that access . <br /> All three bridges are fixed span facilities, with the Merrill Barber and 17`h St. Bridges having <br /> four lanes and the Wabasso Bridge having two lanes. <br /> Community Development Department Indian River County 3 <br />