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(2) Crossing Maneuver. <br />The sight distance required for the safe execution of <br />a crossing maneuver is dependent upon the acceleration capabil- <br />ities of the vehicle, the crossing distance, and the design <br />speed of the street or highway to be crossed. The minimum <br />required sight distance in both directions, measured from the <br />centerline of the roadway being entered to the initial position <br />of the vehicle before the crossing (as shown on Figure 41) for <br />various classes of vehicles shall be as stated in Tables #1 and <br />#2, which follow. Table #1 or #2 shall be applied as the case <br />may be, depending upon whether a given vehicle class consti- <br />tutes five percent or more of the total crossing traffic, or if <br />that class experiences 30 or more crossings per day. A devel- <br />oper shall provide sufficient information on the nature of <br />vehicles using the project to substantiate which class of <br />vehicle table is being incorporated into the landscaping plan. <br />(3) Assumptions. <br />The vehicle offset shall be assumed to be at least <br />ten feet from the nearest pavement edge. The setback required <br />for site distance shall be at least five feet greater than the <br />vehicle offset, as reflected in Figure #1. <br />(4) All landscaping shall be installed and main- <br />tained in a manner which provides unobstructed visibility <br />within the sight distance area calculated hereunder, at a level <br />between two -and -one-half feet and ten feet above grade; provid- <br />ed, however, trees or palms having limbs or foliage trimmed in <br />such a manner that no limbs or foliage extend into the visibil- <br />ity area shall be allowed, provided they are so located so as <br />not to create a traffic hazard. Other landscaping, except <br />required grass or ground cover, shall not be located closer <br />than three feet from the edge of any access -way pavement. <br />(5) Left -Turn Crossings. <br />Sight distance for left -turn crossings shall be <br />measured in the same manner as provided for crossing maneuvers. <br />On median separated roadways, sight distance to the left may be <br />based upon the sight distance required for a two-lane road. <br />10 <br />