§ 155.081 GENERAL STREET DESIGN STANDARDS.

   (A)   General. No subdivision shall be approved that does not connect to an existing or proposed public street or road, or and approved private street.

      (1)   The arrangement of streets and access roads (driveways) shall conform to the transportation requirements of any Comprehensive Plan or official map for the borough.

      (2)   Proposed new streets shall provide for the appropriate extension or interconnection of existing streets.

      (3)   When the subdivision adjoins un-subdivided acreage, new streets or reserved rights-of-way may be required through the boundary lines of the development. Such access and/or street openings shall not be less than 50 feet in width.

   (B)   Street widths.

      (1)   Minimum street widths and cartway (roadway) widths shall be as follows in Table 156D:

Table 156D
	Cartway with Curbs	Cartway with no Curbs	Right-of-Way
Arterial	As prescribed by the Pennsylvania Department of Transportation
Collector	28 ft.	24 ft.	60 ft. **
Cul-de-sac	22 ft.	20 ft.	50 ft. **
Industrial	28 ft.	24 ft.	60 ft. **
Local	22 ft.	20 ft.	50 ft. **
Marginal access	24 ft.	22 ft.	40 ft. **
Private	20 ft.	16 ft.	50 ft. **
**A utility easement of 10 ft. minimum width shall be provided on each side of the street right-of-way.

 

      (2)   Additional right-of-way and cartway widths may be required by the borough for the following purposes:

         (a)   To promote public safety and convenience;

         (b)   To provide parking space in commercial developments and in areas of high-density residential development;

         (c)   Where on-street parking is provided on one or both sides of a street; and

         (d)   To ensure uniformity with intersection or extended street widths.

      (3)   Short extension of existing streets with lesser right-of-way and/or cartway widths than prescribed in this section may be permitted, provided, that no new section of the new right-of-way may be less than 50 feet in width.

   (C)   Street classification.

 

Table 156E
Street Type	Daily Traffic Volume (ADT)
Private	0—40
Cul-de-sac	0—250
Local	0—1,000
Collector	1,000 +

 

   (D)   Residential trip generation rates.

 

Table 156F
Daily Vehicle Trips per Dwelling unit	Weekday	Peak Hour
Multi-family (including apartments, townhouses and condominiums	6.00	0.55
Single-family detached	10.00	1.01

 

   (E)   Cul-de-sac streets.

      (1)   The total traffic volume on a cul-de-sac street shall not exceed 250 average daily trips (ADT).

      (2)   Cul-de-sacs, permanently designed as such, shall not exceed 1,000 feet in length, unless topography factors justify a greater distance or whereby intersecting side streets provide additional access to this cul-de-sac street.

      (3)   Cul-de-sacs shall be provided at the closed end with a turnaround having a minimum radius to the outer cartway edge or curb line of 40 feet.

      (4)   Unless future extension is clearly impractical or undesirable, the turnaround right-of-way shall be placed adjacent to property line and right-of-way of the same width as the street shall be carried to the property line such a way as to permit future extension of the street into the adjoining tract.

   (F)   Industrial streets.

      (1)   An industrial facility which is 20,000 square feet or larger with one or more loading docks shall have access to a collector or arterial street. The street providing access to such a facility shall be constructed to the specifications of an industrial street as established in § 155.080.

      (2)   Industrial streets shall be constructed to either the preferred or alternate specifications as established in § 155.080. According to the land use and PennDOT Publication 242, the borough shall determine which construction specification, preferred or alternate, is suitable for each particular industrial street following review and recommendation by the Engineer.

   (G)   Street alignment and grades.

Table 156G
Design Criteria for Streets1 (Not to Include Intersections)
Type of Street
	Local	Collector	Industrial	Cul-de-sac4	Private
Maximum grade2	8.0%	6.0%	6.0%	6.0%	8.0%
Minimum centerline radius	150 ft.	300 ft.	300 ft.	150 ft.	150 ft.
Minimum grade5	1.0%	1.0%	1.0%	1.0%	1.0%
Minimum sight distance3	150 ft.	250 ft.	250 ft.	150 ft.	150 ft.
Tangent between curves	100 ft.	150 ft.	150 ft.	NA	100 ft.
1   For arterial roads, PennDOT standards will apply.
2   Grades in excess of the allowable percentage may be approved by the Borough Engineer where it is clear that it is necessary and that no traffic hazard is or will be created thereby.
3   Sight distance shall be measured along the centerline of the street between points where a driver’s eyes at 3 ft. 6 in. in height can see an object 6 in. high.
4   Cul-de-sac is the entire street not merely the vehicular turn-around.
5   Modifications to the minimum grade must be approved by the Borough Engineer.

 

      (1)   Horizontal curves shall be laid on all deflecting angles along the centerline of streets, and the degree of curvature shall be set at least to assure the required sight distance.

      (2)   Vertical curves shall be used in changes of grade exceeding 1% and shall be designed for maximum visibility.

   (H)   Street intersections.

      (1)   Streets shall be laid out to intersect as nearly as possible at right angles. No street shall intersect another at an angle of less than 60 degrees.

      (2)   Multiple intersections involving the junction of more than two streets shall be avoided. Where this proves impossible, a modification of this provision shall be sought.

      (3)   Where the grade of any street, at the approach to an intersection exceeds 7%, a leveling area shall be provided having not greater than 4% grades for a distance of 50 feet measured from the nearest right-of-way line of the intersecting street. The grade at actual intersection shall not exceed 2% in any direction.

      (4)   Clear sight triangles of 75 feet measured along street centerlines from their point of junction shall be provided at all intersections and no structures or vegetation higher than three feet shall be permitted within such triangles. The three-foot measurement shall begin from the elevation of the road, where the topography within the triangle is higher than the road, the following standards shall be used for measurement:

 

Table 156H
Topography Elevation	Allowable Structure or Vegetation Height
1 foot higher than the road	2 feet
2 feet higher than the road	1 foot
3 feet or more higher than the road	No vegetation or structure shall be permitted within the sight triangle

 

      (5)   To the fullest extent possible, intersections with arterial streets shall be located not less than 500 feet apart, measured from the centerline to centerline.

      (6)   Intersecting streets shall be separated by 350 feet or more, measured between their centerlines along the centerline of the intersected street.

      (7)   Residential driveways shall be at least 30 feet from adjacent driveways on the same side of the street and at least 50 feet from the centerline of an intersecting street. For industrial development, there shall be at least 70 feet between driveways on the same side of the street, and a at least 90 feet between the closest intersection and any industrial driveway. For commercial development, there shall be at least 50 feet between driveways on the same side of the street and at least 70 feet between the closest radius of the driveway and the intersecting street.

   (I)   Street construction standards. All streets shall be improved and constructed consistent with any construction standards as adopted by the borough by resolution from time to time.

(Ord. 1432, passed 5-18-2015, Art. 5, § 507) Penalty, see § 155.999