HomeMy WebLinkAboutCT 82-18; AVENIDA ENCINAS; TRAFFIC IMPACT STUDY; 1984-02-06Doug Avis
P. O. Box lZO
Oceanside, CA 92054
Dear Mr. Avis:
Suite 524, Security Pacific Plaza • 1200 Third Avenue
San Diego, CA 92101 • (714) 236-5353
February 6, 1984
You asked SourcePoint to analyze the tra,fic impacts 6f downgrading a proposed
extension of Avenida Encinas between Carlsbad houlevard and roinsettia Lane
using the transportation modeling system we developed for the City of Carlsbad.
Two roadway configurations were examined using one set of land use assuJDptions
based on a build-out of Carlsbad's current general plan. First, traffic volumes
were forecast for roadways as proposed in Carlsbad current general plan. In this
case Avenida Encinas was included as a four-lane secondary arterial between
Carlsbad and Poinsettia. In the second case Avenida Encinas was closed to
through traffic between Carlsbad and Poinsettia and downgraded to a two-lane
road. All other assumptions were the same as the first run.
The results of the traffic model runs show only minor traffic impacts of down-
grading Avenidas Encinas. Under the base case with Avenida Encinas as a sec-
ondary arterial, the model assigns little through traffic to Avenida Encinas. Most
through traffic uses Carlsbad Boulevard, Poinsettia Lane, and I-5. In this case,
traffic volumes of 4000 vehicles per day are projected on Avenida Encinas at
Carlsbad Boulevard. Traffic increases to 6000 vehicles per day on Avenida
Encinas as it turns north. The highest daily traffic of 17000 vehicles is projected
to occur on Avenida Encinas between Poinsettia Lane and a proposed commercial
development south of Poinsettia.
The major concern in closing Avenida Encinas is that traffice expected to use the
street would shift to Carlsbad Boulevard and Poinsettia Lane, possibly congesting
the intersections of Carlsbad and Poinsettia, and Avenida Encinas and Poinsettia.
While the traffic model does forecast traffic increases at the two -intersections,
these increases are estimated to be of a small enough m(,l.gnitude to allow inter-
sections to continue to operate at Level of Service "C" or better. 'I11e following
peak hour traffic increases are estimated:
o The northbound approach volume on Carlsbad at Poinsettia increases by from
594 vehicles per hour under the base case to 617 vehicles per hour with
Avenida Encinas downgraded.
o The westbound approach volume on Poinsettia at Carlsbad increases frpm 708
to 729 vehicles per hour under the two roadway scenarios.
A nonprofit corporation chartered by the San Diego Association of Governments
o The eastbound approach volume on Poinsettia at Avenida Encin'as increases
from 283 to 306 vehicles per hour.
An invoice for the traffic model runs is enclosed. If you have any questions con-
cerning the results of the model runs, please feel free to call me.
Sincerely,
BILL McFARLANE
Senior Planner
BM/rw
Enclosure
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