New Jersey Administrative Code
Title 16 - TRANSPORTATION
Chapter 47 - STATE HIGHWAY ACCESS MANAGEMENT CODE
Subchapter 4 - ACCESS CLASSIFICATIONS AND LEVELS
Section 16:47-4.36 - Traffic impact study area

Universal Citation: NJ Admin Code 16:47-4.36

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

(a) Traffic impact study locations shall be established as follows:

1. The half of each trip furthest from the site shall be eliminated. The applicant's responsibility for all trips between the lot and another destination ceases at the midpoint of each trip. This determination shall be made based on a trip table which identifies origins and destinations.

2. Those locations exceeding both 100 new half-trips during the critical peak hour(s), determined in accordance with N.J.A.C. 16:47-4.3 0(d)1i and 10 percent of the anticipated daily site traffic shall be analyzed. Intersections, uninterrupted flow sections, weaving sections, merges, and diverges are examples of locations which shall be analyzed.

3. When determining whether the new 100 peak hour half trips and the 10 percent of the anticipated daily site traffic in accordance with (a)2 above have been met, the following criteria shall be utilized:
i. For signalized intersections:
(1) The number of existing separate traffic signal phases shall be determined;

(2) For each signal phase, the number of new site-generated peak hour half trips assigned to each traffic movement on each approach shall be determined. When a traffic movement is allotted green time in two or more signal phases, the traffic volume based on the percentage of the available green time for traffic movement shall be proportional;

(3) For each signal phase, the site-generated traffic volumes that conflict shall be added together. In the event that the signal phasing and geometry preclude traffic conflict, the highest site-generated half trips traffic volume for any given signal phase by direction shall be considered the traffic volume in conflict. The higher traffic volume in conflict under each signal phase shall be taken;

(4) The traffic volumes for all traffic signal phases obtained in (a)3i(3) above shall be added. This is the total number of new site-generated peak hour vehicle trip impacts for determining study area locations at the signalized intersection;

(5) If the total number of new site-generated peak hour half trips is greater than or equal to 100, then this location may be a study area location and the above four steps shall be repeated for anticipated daily site-generated traffic. If the number is less than 100, then the signalized intersection is not a study area location; and

(6) If the total number of new site-generated daily half trips at the location is greater than or equal to 10 percent of the new site-generated daily trips, then this location is a study area location. If the number is less than 10 percent, then the signalized intersection is not a study area location.

ii. For divided highways, at ramps and ramp junctions, unsignalized intersections, uninterrupted flow sections, weaving sections, merges and diverges, the assignment of site-generated traffic volumes within the half trip length shall be determined as follows:
(1) Turning site trips are defined as that component of the site-generated traffic volume, within the half trip length, which will turn on to or off of the highway within 1,500 feet (457.5 meters) of a highway access point. Through site trips are defined as that component of the site traffic volume, within the half trip length, which will not turn on to or off of the highway within 1,500 feet (457.5 meters) of a highway access point;

(2) Through site trips shall be uniformly distributed among the through lanes on the highway. Assign turning site trips to the right-most through lane;

(3) If the total number of turning site trips plus through site trips in the right-most through lane during the peak hour is greater than or equal to 100, then this location may be a study area location and this test shall be repeated for anticipated daily site-generated traffic. If the number during the peak hour is less than 100, then the location is not a study area location; and

(4) If the total number of turning site-generated daily trips is greater than or equal to 10 percent of the daily trips, then this location is a study area location. If the number is less than 10 percent, then the location is not a study area location.

iii. For all other locations, the general standards in accordance with (a)1 and 2 above shall be applied.

4. Driveways to lots except for the applicant's driveways shall not be considered study area locations. However, signalized driveways shall be addressed when progression is analyzed pursuant to N.J.A.C. 16:47-3.4(b) 2, 3.4(c)2 and 4.30(c)6v.

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