1972.12.18 ORD 1972-110 - Laserfiche WebLink

Home

603.06. Minor streets shall be laid out to discourage their use by through traffic. Thoroughfares shall be reserved for through traffic by providing marginal access streets, interior streets for serving lots, or other means. 603.07. Half or partial streets will not be permitted, except where essential to reasonable subdivision of a tract in conformance with the other requirements and standards of these regulations and where, in addition, satisfactory assurance for dedication of the remaining part of the street can be secured. 603.08. Wherever a tract to be subdivided adjoins an existing half, or partial street, the part of the street within such tract shall be platted. 603.09. Dead-end streets shall be prohibited, except as stubs to permit future street extension into adjoining tracts, or when designed as cul-de-sac streets. 603.10. Private streets and reserve strips shall be prohibited and no public improvements shall be approved for any private street. All streets shall be dedicated for public use. 603.11. Where a subdivision abuts or contains an existing or planned major thoroughfare or a railroad right-of-way, a street approximately parallel to and on each side of such thoroughfare and right-of-way may be required for adequate protection of residential properties and separation of through and local traffic. Such service streets shall be located at a distance from the major thoroughfare or railroad right-of-way suitable for the appropriate use of the intervening land, as for park purposes in residential districts, or for commercial and industrial purposes in appropriate districts. Such distances shall also be deter- mined with due regard for the requirements of approach grades and future grade separations. 603.12. The street arrangements shall not be such as to cause hardship to owners of adjoining property in platting their own land and providing convenient access to it. 604. Cul -De -Sac Streets. 604.01. Cul-de-sac streets, permanently designed as such, shall not exceed six hundred (600) feet in length, except as variances are permitted. Such a variance may be granted if it can be clearly shown that by reason of unfavorable land form, or the irregular shape of the land from which the subdivision is being made, a normal street pattern cannot be established, or that land would be wasted by not granting such a variance. 604.02. Unless future extension is clearly impractical or undesirable, the turnaround right-of-way shall be placed adjacent to a property line and a right-of-way of the same width as the street shall be carried to said property line in such a way as to permit future extension of the street into the adjoining tract. At such time as such a street is extended, the acreage covered by the turnaround outside the boundaries of the extended street shall revert in ownership to the property owner fronting on the tempo- rary turnaround. 605. Street Design. 605.01. Minimum right-of-way widths and pavement widths (face to face of curb) for each type of public street or road shall be as follows: Type of Street Rightof-way Width Roadway Width Thoroughfare 120 feet As determined by traffic needs Collector Street 80 feet 44 feet Commercial or Industrial Service Street 80 feet 44 feet Minor Street 60 feet 32 feet Marginal Access Street 50 feet 32 feet Cul-de-sac 60 foot 45 foot turnaround turnaround radius radius 605.02. Where a subdivision abuts or contains an existing street of inadequate width, sufficient additional width shall be provided to meet the above standards. 605.03. Additional right-of-way and roadway widths may be required to promote public safety and convenience when special conditions require it or to provide parking space in areas of intensive use. 605.04. Extensions of existing streets with lesser right-of-way than prescribed above, may be permitted by variance in special cases. 605.05. Restriction of Access. Access of minor streets onto state and county state aid highways, shall be discouraged at intervals of less than 500 feet. 605.06. Street Jog. Street jogs with centerline offsets of less than one hundred fifty (150) feet shall not be allowed. 605.07. Deflection. When connecting street lines deflect from each other at any one point by more than ten (10) degrees, they shall be connected by a curve with a radius of not less than one hundred 000) feet. 605.08. Grades. Centerline gradients shall be at least 0.4 per cent and shall not exceed the following: Classification Gradient (ln Percent) Thoroughfares and Collector Streets 5 Minor Streets, Marginal Access Streets 8 605.09. Vertical Curves. Different connecting street gradients shall be connected with vertical curves. Minimum length, in feet, of these curves shall be twenty (20) times the algebraic difference in the percent of grade of the two adjacent slopes. 605.10. Angle of Intersection. The angle formed by any intersecting of streets shall not be less than 60 degrees with 90 degree intersections preferred. 605.11. Size of Intersection. Intersections of more than four corners shall be prohibited. 605.12. Corner Radii. Roadways of street inter- sections shall be rounded by a radius of not less than fifteen (15) feet. Roadways of alley -street intersections shall be rounded by a radius of not less than six (6) feet. Corners at the entrances to the turn -around portions of cul-de-sacs shall be rounded by a radius of not less than fifteen (15) feet.