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Comprehensive Plan Transportation Element Other Highwgy Systems Within Indian River County, certain roads or portions of roads are designated as scenic and historic. These roads have special value from a cultural or environmental perspective and, as such, warrant preservation. The most well known of these special facilities is Jungle Trail, a roadway which parallels SR AIA through parts of the unincorporated county and through the Towns of Orchid and Indian River Shores. Presently, this facility is a narrow, unpaved two-lane road wandering through citrus groves and providing panoramic views of the Indian River Lagoon. It is ideal for recreational purposes such as walking, jogging, or bicycling. In addition to Jungle Trail, the other scenic/historic roads are Old Winter Beach Road, Quay Dock Road, Fellsmere Grade, and Gifford Dock Road. These are discussed in more detail in the Land Use, Coastal Management and Recreation and Open Space Elements of the plan. Hurricane Evacuation In Indian River County, as in all coastal counties, hurricane evacuation is important. While all residents of the County need not evacuate in the event of a hurricane, those residents living on the barrier island and those living in mobile homes are required to evacuate even in the event of a Category I hurricane, the least severe type of hurricane. The Coastal Management Element of this plan addresses hurricane evacuation in detail. As indicated in the Coastal Management Element, several hurricane evacuation studies have been done for the Treasure Coast area, including Indian River County, by the Regional Planning Council. The last hurricane evacuation study update was done in 1994. Those studies showed that the County's clearance time ranged from 5 %2 hours for a summer season, rapid response Category 1 or 2 storm event to 10 '/2 hours for a late fall season, long response Category 3 - 5 storm event. Clearance time is defined as the time required to clear roadways of all vehicles evacuating in response to a hurricane or other severe weather event. There are three components of clearance time. These are mobilization time, travel time, and delay time. From a transportation system perspective, travel time and delay time are important, because those times are to a great extent dependent upon roadway characteristics. Figure 4.3 depicts the principal evacuation routes in the County. Community Development Department Indian River County 20