(a) General.
(1) The street system of a proposed nonresidential subdivision or land development should be designed to create a functional street pattern, to prevent the congestion of existing streets, to assure the free flow of through traffic without interference from parked or parking cars, and to provide adequate and safe parking spaces.
(2) Where there are no specific standards governing street design for nonresidential subdivisions and land developments, the regulations for residential streets shall apply. See § 1236.03.
(3) Proposed streets in nonresidential developments may be a hierarchy of roads or a single point of access. The hierarchical classification system may consist of the following:
A. Entrance road. To provide direct access into shopping centers, local commercial establishments, planned business campuses and limited industrial uses; and
B. Secondary road. To provide access to individual lots in a planned business campus and industrial parks.
(4) Streets carrying nonresidential traffic shall not be extended to the boundaries of adjacent existing or potential residential areas, nor be connected to streets intended for predominantly residential traffic.
(5) The arrangement of streets shall provide for continuation of existing or proposed streets and proper access to adjoining undeveloped tracts suitable for future nonresidential development.
(6) Where feasible, nonresidential developments should provide more than one point of access. Also, where conditions permit, a one way in, one way out pattern should be considered.
(7) Where feasible, the distance between points of access shall not be less than 200 feet.
(b) Right-of-way and cartway widths.
(1) Street right-of-way and cartway widths in proposed subdivisions and land developments shall conform to the minimum standards listed in Table 5 below:
Table 5 | ||
Nonresidential Street Widths | ||
Right-of-Way Width (ft.) | Cartway Width (ft.) | |
Entrance road | 60 | 36 |
Secondary road | 50 | 32 |
(2) Proposed nonresidential development to be located on existing streets shall be required to increase the cartway along the frontage of subject property to conform with the standards in the table above or with standards in Table 2, § 1236.03, whichever is applicable.
(3) Right-of-way widths for nonresidential streets should be based on the actual need to accommodate utilities, drainage facilities, landscaping, street furniture and grading.
(4) Greater width may be required, based on traffic design requirements and the type and volume of the anticipated traffic.
(5) No parking spaces shall be provided on the entrance road.
(c) Street grades.
(1) The maximum street grades shall be as follows:
A. Entrance road, 4%; and
B. Secondary road, 8%.
(2) All streets shall have a minimum grade of 1%.
(d) Horizontal curves.
(1) Whenever street centerlines are deflected more than five degrees, connection shall be made by horizontal curves.
(2) Horizontal curves shall be designed with a minimum centerline radius of 400 feet for entrance roads. For secondary roads the minimum centerline radius shall be 300 feet.
(3) A minimum tangent of 100 feet shall be required between reverse curves on nonresidential streets and between a curve and a street intersection where one of the intersecting streets is a collector or an arterial street.
(e) Vertical curves.
(1) Vertical curves shall be used when there is any change in grade.
(2) Vertical curves shall be designed with a minimum sight distance of 300 feet for both entrance roads and secondary roads.
(f) Intersections.
(1) Streets shall intersect at right angles whenever practicable, and no two streets shall intersect at an angle less than 60 degrees.
(2) When an entrance road and another street intersect a third street from opposite sides, their centerlines shall be offset a minimum of 400 feet.
(3) Clear sight triangles shall be provided at all intersections. Within such triangles, no object that would obscure the vision of the motorist shall be permitted. Such triangles shall be established from a minimum distance of 150 feet from the point of intersection of the centerlines of two streets.
(g) Culs-de-sac. The minimum radius of the turnaround shall be 65 feet to the curbline and 75 feet to the right-of-way line.
(Ord. 668, passed 10-17-1990)