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ROAD ACCESS TO VERO BEACH HIGHLANDS SUBDIVISION <br />Public Works Director Jim Davis presented staff's <br />recommendation for both the 20th Avenue south extension and the <br />17th Street SW extension to 27th Avenue as additional accesses to <br />Vero Beach Highlands: <br />TO: James E. Chandler, <br />County Administrator <br />FROM: James W. Davis, P.E., <br />Public Works Dikecto <br />SUBJECT: Road Access to Vero each Highlands Subdivision <br />REFERENCE MEMO: M.L. Orr to Board of County Commissioners <br />dated Aug. 13, 1987 <br />DATE: May 25, 1989 <br />DESCRIPTION AND CONDITIONS <br />On August 25, 1987, the Board of County Commissioners considered <br />the southerly extension of 20th Avenue into Vero Beach Highlands <br />Subdivision. In preparation for staff recommendation, the <br />Traffic Engineering Division prepared the above referenced <br />memorandum (copy attached) which presented the staff analysis of <br />the additional Vero Beach Highlands access road. At that time, <br />both the extension of 20th Avenue to Vero Beach Highlands <br />Subdivision and the construction of 17th Street SW from 20th <br />Avenue to 27th Avenue were recommended. <br />ALTERNATIVES AND ANALYSIS <br />Since the August 13, 1987 memorandum, the following additional <br />circumstances apply: <br />1) The attached Indian River County Traffic Engineering Traffic <br />Count records for 1989 (first quarter) show that both Old <br />Dixie Highway north of Oslo Road and 27th Avenue north of <br />Oslo Road are carrying 8,700 vehicles per day (vpd) and <br />7,800 vpd, respectively. In addition, U.S. Highway 1 is <br />approaching LOS "D" between Oslo Road and 4th Street(31,400 <br />vpd). The existing traffic count along 20th Avenue <br />between Oslo Road and 4th Street is approximately 2,300 <br />vpd. <br />As Vero Highlands Subdivision becomes developed, approxi- <br />mately 846 single family homes and 135 multi -family units <br />located in the western section of Vero Highlands Subdivision <br />(west of 12th Avenue SW) will generate approximately 8,902 <br />trips. Assuming 50% of these trips are external, approxi- <br />mately 4,500 trips will demand access to western connections <br />(17th Street SW to 27th Avenue, 20th Avenue extended, or <br />both). By assigning all 4,500 trips to 27th Avenue via 17th <br />Street SW, the traffic count on 27th Avenue, attributed to <br />growth in Vero Beach Highlands only, would be approximately <br />10,000 vpd south of Oslo Road or LOS "D". In addition, <br />there are 1,000 lots in the southwest section of Oslo Park <br />which would distribute additional trips to 27th Avenue. If <br />only 30% of the Oslo Park Subdivision trips are added to <br />27th Avenue, a LOS "E" condition would occur on 27th Avenue. <br />If both 20th Avenue Extension and 17th Street SW to 27th <br />Avenue are constructed, both 27th Avenue and' 20th Avenue <br />could operate at LOS "C" unless future large developments <br />are approved within the area. <br />13 <br />JUN 6 1989 <br />L J <br />BOOK 6 EAU 95 <br />