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BARTON-ASCHMAN ASSOCIATES, INC. 5310 N.W. 33rd Avenue, Suite 206 • Fort Lauderdale, Florida 33309 USA • (305) 733-4220 • Fax: (305) 733-4665 July 12, 1994 Mr. Jack McLean 139 Anchor Drive Vero Beach, FL 32963 RE: Sea Mist Shoppes Review Dear Mr. McLean: Per your request, I have thoroughly reviewed the traffic report and the revised site plan prepared 'by the consultant, Kimberly Horn Associates, for the Sea Mist Shoppes development. The consultant apparently has followed the current engineering practices and standards in developing this report. One of the most questionable items in the analysis is the traffic split towards the north and south of the site.. They have distributed the traffic, under the county engineering directions, sixty (60) percent to and from north, thirty (3 0 ) percent to and from south, . and five ( 5 ) percent each to and from east and west. This directional split could determine how much of the site traffic will be using Windward Way as opposed to Moorings Drive. Of course, the amount of project traffic on these roadways and subsequently on'the driveways has a bearing on the driveway design. The county engineers staff are probably correct in recommending 60/30 traffic splits from north and south considering the area of influence to be Indian River County. In my opinion the area of influence should extend further south to the North St. Lucie Bridge. Therefore based on 1990 census data and the residential population data that you provided me a conservative estimate would be an equal split of the traffic from the north and the south. Evenly distributing the 4438 trips between the north and the south driveways of the Sea Mist Shoppes site -will require both these driveways to be designated as "Major Driveways" with 100' set back in accordance with Section .952.29 of the Indian River County LDR. Additionally, I would like to bring the following points to your attention: • The traffic report cites 57.9 percent passerby capture based on the ITE trip generation manual. The manual, however, cautions this estimation and recommends using engineering judgement whenever possible. In my observation this figure is high and a lower value based on engineering judgement should have been used. • An operating AIA is used observations that. July 129 1994 speed equivalent to posted speed of 45 mph on in the intersection analysis. From my brief the operating speed appeared to be higher than 86 boa, 92 PAGE 060