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<br />When a street that will be extended at a later date is constructed as a tem�a- Fz�vx� 2-21
<br />rary dead-end street, a temporaryturnaround must be provided. Curbs. if used. Horizontal curves can be descnbed
<br />should be terminated before the entranceto the turnaround. Such dead ends by the radius of the circle formed
<br />by the centerline of the curve (at
<br />� generally should be barricaded to preventveh�c[e� from leaving the street. 1e�},
<br />The recommended radius for the paved area of a circular turnaround without ���E ���
<br />a center island serving passenger vehicles is 30 feet (Figure 2-25). If frequent Sight distance on a horizontal
<br />use of the turnaround by single unit vehicles (municipal services equipment, curve is limited by the sharpness,
<br />school buses) is likely, a 42-foot radius may be required. Single unit vehiclescan or radius, of the curve (at right).
<br />use a turnaround with a 30-foot radius, but backing would be required. A 42-foot
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<br />Design Considerations 33
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