N.J. Admin. Code § 5:21-4.19

Current through Register Vol. 56, No. 24, December 18, 2024

Section 5:21-4.19 - Street grade, intersection, pavement, and lighting construction standards

(a) The following apply to street grade:

1. Minimum street grade permitted for all streets shall be 0.5 percent.

2. Maximum street grade shall vary by road hierarchy with flatter grades required for roads with higher ADTs, in accordance with the requirements shown in Table 4.6. Where terrain makes it necessary, the allowable maximum grade may be increased by up to two percent, but shall not exceed a maximum grade of 16 percent.

(b) The following shall apply to intersections:

1. Street intersections shall be as nearly at right angles as possible and in no case shall be less than 75 degrees.

2. New intersections along one side of an existing street shall, if possible, coincide with any existing intersections on the opposite side of each street. Where provided, offsets for intersections along the same or opposite sides shall be at least 150 feet between right-of-way centerlines.

3. Intersections shall be rounded at the curbline with the street having the highest radius requirement, as shown in Table 4.6 below, determining the minimum standard for all curblines.

4. Intersections shall be designed with a flat grade wherever practical.

5. The minimum centerline radius, minimum tangent length between reverse curves, and curb radii shall be as shown in Table 4.6 below.

6. Sight triangles shall be in accordance with AASHTO's "A Policy on Geometric Design of Highways and Streets" standards and based on the speed limits established by the government agency having jurisdiction. Sight triangle easements shall be required and shall include the area on each street corner that is bounded by the line which connects the sight or "connecting" points located on each of the right-of-way lines of the intersecting street. The planting of trees or other plantings, or the location of structures exceeding 30 inches in height that would obstruct the clear sight across the area of the easements, shall be prohibited, and a public right-of-entry shall be reserved for the purpose of removing any object, material or otherwise, that obstructs the clear sight.

TABLE 4.6
STREET GRADE, CURVE AND INTERSECTION DESIGN CRITERIA
Street Hierarchy
Special	Special	Rural,	Minor	Major
purpose	purpose	residential	collector	collector
street:	street:	access, and
alley	cul-de-sac	neighborhood
Minimum Grade	0.5%	0.5%	0.5%	0.5%	0.5%
Maximum Grade	15%	12%	12%	10%	8%
Maximum Grade of	5%	5%	5%	5%	5%
Secondary Street within
50 feet of
Intersection< + >
Minimum Center-Line	100 ft	100 ft	100 ft	150	300
Radius	ft	ft
Minimum Tangent	0 ft	50 ft	50 ft	100	150
Length between Reverse	ft	ft
Curves
Curb Radii	20 ft	25 ft	25 ft	30 ft	35 ft

Note: < + >As measured from the nearest right-of-way line.

(c) Pavement shall be designed using either Figures 4.2 through 4.5, the structural number method, or the alternate pavement design methods referenced in (c)3 below.

1. Pavement design using figures: Pavement design for special-purpose streets (cul-de-sac, rural, etc.), residential access, neighborhood, minor collector, and major collector shall follow the specifications shown in Figures 4.2 through 4.5 based on the street type. Subgrade categories are shown in Table 4.7 below.

2. Structural number method: As an alternative to using Figures 4.2 through 4.5, applicants may design pavement using the structural numbers found in Table 4.9 below.

i. The designated structural number must be achieved by choosing the appropriate layers of bituminous stabilized surface course (Mix I-4, Mix I-5), bituminous stabilized base course (Mix I-2, stone mix), bituminous stabilized base course (Mix I-2, gravel mix), dense graded aggregate base course, soil aggregate base course, and subbase. The structural values and minimum layer thicknesses for the various materials are listed in Table 4.8 below. TABLE 4.7

SUBGRADE CATEGORIES

Data in image

Notes: Refers to categories of soil types and properties

Sources: Per the Rutgers Model Subdivision and Site Plan Ordinance by David Listokin and Carole W. Baker, January 1987--Original strength test and soil classification information derived from the Asphalt Institute, "Thickness Design--Full-Depth Asphalt Pavement Structures for Highways and Streets," MS-1, 8th Edition, August 1970 in Robert F. Baker et al. (editor), Handbook of Highway Engineering. Inclusion of SW, SP, SC soil classifications based on information from the Portland Cement Association's Thickness Design for Concrete Highway and Street Pavements.

Revised CBR strength test and M[r] value information are from the Asphalt Handbook for County and Municipal Engineers, November 1991 (Second Edition), published by the New Jersey Society of Municipal Engineers.

TABLE 4.8
PER-INCH STRUCTURAL VALUE FOR VARIOUS PAVING MATERIALS
Layer Material	Structural value per-inch	Minimum
thickness	thickness
Asphalt concrete surface	0.44	1.5 inches
course, Hot Mix Asphalt (HMA)
9.5L64 or HMA 9.5M64< 1 >
Asphalt concrete base course	0.44	3 inches
HMA 19L64 or HMA 19M64< 1 >
Dense graded aggregate base	0.14	4 inches
course< 2 >
Soil aggregate base	0.11	4 inches
course< 2 >
Subbase	0.08	6 inches

Notes:

< 1 > Materials for asphalt concrete surface and base courses shall conform to Section 401 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

< 2 > Materials for aggregate base shall conform to Section 302 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

ii. Thicknesses shall be provided in 0.5 inch increments.

TABLE 4.9
STRUCTURAL NUMBER VALUES AS A FUNCTION OF ADT AND M[r]<1>
SN[0] prior to two-inch asphalt concrete surface
course
Maximum ADT<2&gt;	M[r] = 3,000	M[r] = 5,000	M[r] = 7,500
psi Poor Subgrade	psiMedium	psiGood/Excellent
Subgrade	Subgrade
200	1.60	1.15	0.84
250	1.69	1.23	0.91
500	1.99	1.49	1.14
750	2.17	1.65	1.29
1,000	2.31	1.77	1.40
1,250	2.42	1.87	1.48
1,500	2.52	1.95	1.55
1,750	2.60	2.02	1.61
2,000	2.67	2.08	1.67
2,250	2.73	2.13	1.72
2,500	2.79	2.18	1.76
2,750	2.84	2.23	1.80
3,000	2.89	2.27	1.84
3,250	2.93	2.31	1.88
3,500	2.97	2.35	1.91
3,750	3.17	2.52	2.06
4,000	3.21	2.55	2.09
4,250	3.24	2.58	2.12
4,500	3.28	2.61	2.15
4,750	3.31	2.64	2.17
5,000	3.34	2.67	2.20
5,250	3.37	2.69	2.22
5,500	3.40	2.72	2.24
5,750	3.42	2.74	2.26
6,000	3.45	2.76	2.28
6,250	3.48	2.79	2.30
6,500	3.50	2.81	2.32
6,750	3.52	2.83	2.34
7,000	3.55	2.85	2.36
7,250	3.57	2.87	2.38
7,500	3.59	2.89	2.39

Notes:

< 1 > All subgrades shall be considered "poor," unless the applicant proves otherwise through CBR testing or field evaluation of soil classification. Test results shall be reviewed by the municipal engineer.

< 2 > ADT ranges for street types listed in the standards are as follows:

Rural Lane	0-200
Cul-de-sac	0-250
Rural Street	0-500
Alley	0-500
Multifamily Access	0-1,000
Cul-de-sac
Residential Access	0-1,500
Residential	0-1,500
Neighborhood
Minor Collector	1,501-3,500
Major Collector	3,501-7,500

*2*Source: The Table is derived from the AASHTO Guide for Design of *2*Pavement Structures (1993). *2*

3. Alternate pavement design: Alternate pavement design shall be allowed provided it conforms with one of the following: AASHTO Method of Flexible Pavement Design, AASHTO Method of Rigid Pavement Design, Fatigue Strength Method of Design, Multilayer Elastic Analysis, or the National Crushed Stone Association Design, incorporated herein by reference.

(d) Lighting (Reserved) Figure 4.2

Data in image

Source: N.J.S.M.E., Asphalt Handbook for County and Municipal Engineers, 4th Edition, April 2010. The figures were derived by applying the Asphalt Institute's Thickness Design - Full Depth Asphalt Pavement Structures for Highways and Streets.

NOTES:

1. Materials for the hot mix asphalt (HMA) surface course shall be HMA 9.5L64 or HMA 9.5M64, conforming to Section 401 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

2. Materials for the hot mix asphalt base course shall be HMA 19L64 or HMA 19M64, conforming to Section 401 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

3. Thicknesses may have to be constructed in multiple lifts, based on equipment capabilities.

4. The dense graded aggregate base shall conform to Section 302 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

5. All subgrades shall be considered "poor" unless the applicant proves otherwise through CBR testing or field evaluation of soil classification. Test results shall be reviewed by the municipal engineer.

6. Subgrade compaction shall be approved by the municipal engineer.

7. Pavement thickness designs assume a staged construction process. The life of the road is 20 years. The pavement base course is designed to withstand construction traffic during an assumed three-year construction period, throughout which time the hot asphalt surface course has not been placed. At the end of the construction period, the base course must have an expected remaining life of 17 years. During the time when the surface course is not in place, the base course must carry the entire imposed traffic loading. Figure 4.3

Data in image

NOTES:

3. Thicknesses may have to be constructed in multiple lifts, based on equipment capabilities.

4. The dense graded aggregate base shall conform to Section 302 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

6. Subgrade compaction shall be approved by the municipal engineer.

Data in image

NOTES:

3. Thicknesses may have to be constructed in multiple lifts, based on equipment capabilities.

4. The dense graded aggregate base shall conform to Section 302 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

6. Subgrade compaction shall be approved by the municipal engineer.

Data in image

Source: N.J.S.M.E., Asphalt Handbook for County and Municipal Engineers, 4th Edition, April 2010. The figures were derived by applying the Asphalt Institute's Thickness Design--Full Depth Asphalt Pavement Structures for Highways and Streets.

NOTES:

3. Thicknesses may have to be constructed in multiple lifts, based on equipment capabilities.

4. The dense graded aggregate base shall conform to Section 302 of the New Jersey Department of Transportation's Standard Specifications for Road and Bridge Construction.

6. Subgrade compaction shall be approved by the municipal engineer.

N.J. Admin. Code § 5:21-4.19

Administrative correction.
See: 29 N.J.R. 1296(a).
Administrative correction.
See: 29 N.J.R. 2816(a).
Amended by R.1999 d.374, effective 11/1/1999 (operative May 1, 2000).
See: 31 N.J.R. 477(a), 31 N.J.R. 3259(a).
Rewrote (b)2; and in Table 4.6, deleted Intersection Standard heading, and substituted a reference to Maximum Grade of Secondary Street for a reference to Maximum Grade.
Amended by R.2000 d.480, effective 12/4/2000 (operative June 3, 2001).
See: 32 N.J.R. 2670(b), 32 N.J.R. 4277(a).
Rewrote (c); amended Figures 4.2 and 4.3; and inserted Figures 4.4 and 4.5.
Amended by R.2002 d.399, effective 12/16/2002.
See: 34 N.J.R. 2615(a), 34 N.J.R. 4412(a).
Added new (c), including Tables 4.8 and 4.9; deleted former (c); recodified former (d) as new (c)3; added new Figures 4.2 through 4.5 and deleted former Figures 4.2 through 4.5.
Public Notice: Notice regarding the Publication of two Notices of Adoption in the December 16, 2002 New Jersey Register.
See: 34 N.J.R. 4343(a), 4412(a), 35 N.J.R. 219(b).
Administrative correction.
See: 35 N.J.R. 2494(a).
Amended by R.2005 d.56, effective 2/7/2005.
See: 36 N.J.R. 4025(a), 37 N.J.R. 481(c).
Amended by R.2006 d.47, effective 2/6/2006.
See: 37 N.J.R. 3878(a), 38 N.J.R. 925(a).
In (b)2, added "for intersections along the same or opposite sides"; in (b), added ", CURVE" to the heading of Table 4.6.
Amended by R.2007 d.177, effective 6/4/2007.
See: 38 N.J.R. 3698(a), 39 N.J.R. 2234(a).
In footnotes 1 and 2 of Table 4.8, inserted "or 406.02"; and in footnotes 1 and 2 of Figures 4.2 through 4.5, inserted "or 406.02" and deleted "(1989)" from the end.
Administrative correction.
See: 39 N.J.R. 4395(a).
Amended by R.2008 d.26, effective 1/22/2008.
See: 39 N.J.R. 4363(a), 40 N.J.R. 613(a).
In footnote 4 of Figures 4.2 through 4.5, substituted "Specifications" for "Specification" and deleted "(1989)" from the end.
Amended by R.2009 d.185, effective 6/15/2009.
See: 41 N.J.R. 913(a), 41 N.J.R. 2463(a).
Section was "Street grade, intersections, pavement, and lighting construction standards". In the introductory paragraph of (c), deleted "either" preceding "Figures"; transposed Table 4.7 from the end of the section to preceding Table 4.8; in Table 4.7, in the column headings of part A, substituted "CBR" for "Cbr" and "M[r]" for "Mr", in the third column of part B, inserted a comma following "MH", and in the Notes, substituted "M[r]" for "Mr"; in Table 4.8, substituted "Asphalt concrete surface course, Hot Mix Asphalt (HMA) 9.5L64 or HMA 19M64<1>" for "Bituminous stabilized concrete surface (Mix I-4, Mix I-5)<1>", and "Asphalt concrete base course (HMA) 9.5L64 or HMA 19M64<1>" for "Bituminous stabilized base course (Mix I-2, stone mix)<2>", deleted former third row "Bituminous stabilized base course (Mix I-2, gravel mix)<2>", and rewrote footnotes 1 and 2; and in Figures 4.2 through 4.5, rewrote footnotes 1 through 4 and 7.
Amended by R.2011 d.136, effective 5/16/2011.
See: 43 N.J.R. 236(a), 43 N.J.R. 1249(a).
In the introductory paragraph of (c), substituted "(c)3" for "3"; in the first entry under column "Layer Material" in TABLE 4.8, substituted "9.5M64<1>" for "19M64"; in the second entry under column "Layer Material" in TABLE 4.8, substituted "19L64" for "9.5L64"; in the first entry under column "Minimum thickness" in TABLE 4.8, substituted "1.5" for "2"; rewrote Figures 4.2, 4.3, 4.4 and 4.5; in the "Source:" following Figures 4.2, 4.3, 4.4 and 4.5, substituted "4th Edition, April 2010" for "3rd Edition, March 2000"; and rewrote the NOTES following Figures 4.2, 4.3, 4.4 and 4.5.