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Average Daily Traffic (ADT)
There were nine (9) intersections
that were analyzed in the Final
Program Environmental Impact
Report for the Red Hill Avenue
Specific Plan.
These intersections, identified
by their respective numbers, are
shown on the map. All of the
traffic study area intersections
are signalized.
The intersections of Red Hill
Avenue at Interstate 5 (1-5)
northbound and southbound
ramps were also analyzed.
Average Daily Traffic (ADT) — cont'd
Table 4.13-7, below, illustrates the different roadway segments along Red Hill Avenue and
the existing Average Daily Traffic (ADT) plus projected additional trips generated by the
development potential of the Specific Plan (i.e. "Project). The Project is defined as 500
additional residential units and 325,000 square feet of additional commercial space
within the Specific Plan area.
Based on the street segments shown below, the number of additional ADT generated by
the Project with build -out of the Specific Plan, ranges between 2,300 — 8,800 ADT per day.
As a percentage, this is an increase of 8% to 34% over no -project conditions. The bulk of
the increase in traffic is due to the additional commercial square footage that would be
allowed within the area. There is 296,446 square feet of existing non-residential
development within the Specific Plan area and with the proposed 325,000 square feet of
additional non-residential development under the Plan, the total development estimate
is 621,446 square feet.
However, the existing General Plan estimated maximum buildout based on existing land
use designations for the Specific Plan area is 913,724 square feet of non-residential
development and no dwelling units. In comparison with the maximum estimated buildout
under the General Plan, the Specific Plan would result in the reduction of 292,278 fewer
square feet of potential non-residential development but with an addition of 500
residential units. With this reduction in potential non-residential development, it is
possible that the full implementation of the Specific Plan would result in fewer ADT thaen
the full implementation of the existing General Plan maximum buildout in the area.
If the focus is only on the residential units that would be added with the proposed Specific
Plan, the 500 additional residential units would result in an average increase of
approximately 3 percent to the existing ADT volume of each segment of Red Hill Avenue.
All roadway segments would continue to operate at an acceptable level of service and the
addition of Project traffic would not cause a significant impact at any traffic study area
intersection.
Table 4.13.7. Roadway
Segments - Existing Pius Project
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Red Hili
Bryan Avenue to San Juan Street
50,600
21,800
2,:500
24,300
Yes
Avenue
San Juan Street to EI Camino Real
50,600
25,900
8,800
34,700
Yes
Nisson Road to Mitchell Avenue
50,600
29,200
6,300
35,500
Yes
Mitchell Avenue to Walnut Avenue
50,600
26,700
4,500
31,200
Yes
Walnut Avenue to Sycamore Avenue
150,600
127,700
12,300
130,000
1 Yes
LOS - Level of Service; ADT = Average Daily Traffic
Bald and shaded values Indicate a deficient Level of Service, based on City at Irvine Traffic Analysis Guidelines.
Source: Kimley-Horn, 2018,