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RESOLUTION 85-128 (con't) 59. Beginning the first winter season following the completion of Indian River Boulevard as a two or four lane facility between S.R. 60 and at 53rd Street and continuing annually until project buildout or implementation of the improvements listed below, a traffic monitoring study of the intersections of Indian River Boulevard/17th Street and 17th Street/A-1-A shall be conducted. The monitoring report, submitted for approval to the Treasure Coast Regional Planning Council and Indian River County, will identify the timing of the following geometrics necessary to maintain Level of Service C during annual average conditions and Level of Service D during the peak season conditions. a) construction of the intersection at Indian River Boulevard/17th Street to the following geometrics: Northbound - Left -turn lane, two through lanes, right -turn lane Southbound - Two left -turn lanes, two through lanes, right -turn lane Eastbound - Left -turn lane, three through lanes, right—turn lane Westbound - Left -turn lane, two through lanes, right -turn lane Signalization modifications as necessary; and b) construction of the intersection at 17th Street/A-1-A to the following geometrics: Northbound - Two left -turn lanes, one through/right-turn lane Southbound - Left -turn lane, through lane, right -turn lane Eastbound - Two left -turn lanes, through lane, right -turn lane Westbound - Left -turn lane, through lane, right -turn lane Signalization modifications as necessary Additional building permits shall not be issued if improvements, as identified in the traffic monitoring report, have not been let for construction by a public agency within six months after the improvements have been identified as being needed. 60. In the first winter season following 12 months after the project has generated over 26,400 average external daily trips, a traffic study shall be conducted, submitted to and approved by Indian River County and Treasure Coast Regional Planning Council to determine existing and future operating conditions of the segment of U.S. 1 between Royal Palm Boulevard (23rd Street) and 37th Street and the intersection of U.S.1/Royal Palm Boulevard (23rd Street). If the Intersection and/or segment of U.S. 1 are operating below Level of Service D during the peak season and below level of Service C during average annual conditions or are projected to operate below Level of Service D and C prior to or at project buildout, the study shall identify the following: Page 16