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Design Speed Operating Curvature R/W Cost Bridge Road <br />(MPH) Speed(MPH) Radius w/ (in Millions) Cost Paving <br />Suver -elevation <br />65 55 3,000' 21.6 AC $1.688 M $223,000 <br />$433,000 <br />60 50 2,600' 18.7 AC $1.688 M $192,000 <br />$375,000 <br />55 45 2,300' 16.6 AC $1.688 M $168,000 <br />$332,000 <br />50 40 1,800' 13 AC $1.688 M $129,000 <br />$260,000 <br />45 35 1,450' 10.5 AC $1.688 M $102,000 <br />$210,000 <br />Taking the 55 MPH design speed, the cost is $1,688,000 - <br />Bridge Cost, $332,000 for 16.6 Ac Right-of-way, and road <br />paving for 168,000. <br />If any of the above radii are implemented, the increased <br />roadway curvature will result in 85th Place, 86th Street, and <br />86th Place intersecting CR510 at location on the curve. These <br />intersections will demand turning movements within the curve <br />and would create hazardous site distance conditions, <br />complicated drainage conditions due to the need for <br />super -elevation and will require increased right-of-way <br />acquisition for these intersecting streets. <br />II. Construct T -intersection at 85th Street(CR510 east/west) <br />and 90th Avenue (CR510 North/South). <br />As the approximate 9,000 lots within Vero Lake Estates <br />Subdivision develop, a large traffic demand will be created <br />from those vehicles leaving and entering the subdivision. It <br />is anticipated that at least one, and possibly more signalized <br />intersections will be required on CR510, to Vero Lake <br />Estates. A future 3 -way signalk#pd �-'Antet'section at 85th <br />Street (CR510 east/west alignment). and 90th Avenue(CR510 <br />North/South) connecting to the Vero Lake Estates Subdivision <br />would substitute the existing 200' radius curve with a <br />signalized intersection. The cost (not including <br />signalization) would be approximately $50,000. <br />III. Do Nothing at this time - Continue to monitor <br />In the past four years since December 1990, only four <br />reported accidents occurred at the curve. These <br />accidents all occurred in 1991. Since that time, <br />additional safety features have been constructed <br />including thermoplastic rumble strips, increased signage, <br />etc. No accidents have been reported (by the Florida <br />Highway Patrol or IRC Sheriff's Dept.) in 1992, 1993, nor <br />1994 to date. <br />Staff would continue to monitor the location and <br />reconsider an improvement project. <br />APR 2 8 1994 17 <br />BOOK F.VE`�• <br />