Item 1 3-Way Stop Calle Grande & Calle BajaOf 0
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GOFFOF?4 7.
:AGENDA ITEM
February 13, 201:9
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TO City Traffic Commission.:
THRU:; ::Frank Sun; City Engineer
FROM:-. -_Dave Allenbach, Transportation Analyst
REVIEW: Assistant Traffic Engineer: Public Works Director
1::. SUBJECT
A request for the installation of a three =way stop control at the: intersection of Calle
Grande and.Calle Baja.
2. SUMMARY:.
The requested stop control: - is to mitigate, sight distance restrictions at the subject
intersection.
3. RECOMMENDED::ACTION
...Approve the installation. of the three -way stop: control at -the intersection of_Calle: Grande
and:Galle Baja.
4. FISCAL IMPACT
The total expenditure: for the project' is $1,000 and will be funded in Minor Traffic Control
Devices (16302): through Traffic . Improvement Measure M2 (263).
5. STRATEGIC. PLAN GOALS --------
Goal: 1: Provide for safe community
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b. Provide.and maintain infrastructure necessary to ensure the safety of the public.
6. DISCUSSION AND BACKGROUND ... .
This is a request from Mr. Danny Kuykendall.of_Calle Baja for. the. installation of.a.three
way stop control at the intersection of Calle. Grande and Calle :Baja. The basis for. this
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request is to enhance: traffic safety. Pursuant to this request a traffic study conducted
at -the: subject intersection. The results: areas follows:
Existing Conditions
Both Calle G range and Calle Baja, are. classified as residential roadways_ in_ the study area...
Calle Grande::runs predominantly in a north -south direction curving to an east =west
direction. in :proximity to. thesubject intersection. Calle Grande: :has a grade :of: 13%
ITEM 1 02/13/2019
beginning at the top of the hill, a quarter mile south of the study area. The grade flattens
to approximately 10% within the study area. There are several .horizontal curves on Calle
Grande as well with radii averaging about 200 feet. Calle Grande terminates southerly of
the: subject intersection at La Cumbre Drive and northerly at Chapman Avenue. North-
south traffics: controlled .at both locations by one -way stops. The - posted speed limit on
Calle Grande is 25, mile per hour.
Calle Baja also runs in a north -south direction, terminating about 200 feet south .of the
subject : intersection in a cul -de -sac. This street serves about nine. single family homes.
Traffic on Calle :Baja. is controlled by a one -way stop at Calle Grande. On street parking
is allowed on both streets, but demand is very low.
Traffic Volume Characteristics
AM and PM peak hour turn counts were conducted at the subject intersection as part of
this study. Results of the counts indicate that the traffic volume is fairly light. A total of 52
vehicles were: counted entering the subject intersection from all approaches during the
AM peak hour (7:30 =8:30 am) and 29 vehicles were counted entering the intersection -
during the PM peak hour (4:30 -5:30 pm).
Accident History.
The accident.history at the, subject intersection. was evaluated for the past.. three year
period. According to our records, there was one reported accident at the intersection in
the time frame. The accident occurred on December 12, 2016 and involved a D.U:I. driver
northbound on Calle Grande hitting two:parked vehicles also on Calle Grande.
Intersection Geometry
Due to the curvilinear nature of Calle Grande, sight distance for motorists exiting Calle
Baja onto Calle Grande is somewhat limited. The measured sight distance from Calle
Baja looking south on Calle Grande is 126 feet. The minimum sight distance prescribed
in the.city's stop warrants for local streets is 175 feet. There appears - to_ be no reasonable .: .
means of acquiring additional sight distance that would be less restrictive and less costly
than a three -way stop. The -photo at below illustrates geometry atthe subject intersection.
ITEM. 1 2 02/13/2019
Recommendation
Based on the results of the traffic study and the intersection geometry, a three -way stop
at the intersection of Calle Grande and Calle Baja is warranted. It is staff's
recommendation that the Traffic Commission approve the request for a three -way stop at
the subject intersection.
The residents living within 300 feet of the subject intersection were notified by mail of this
item on the Traffic Commission Agenda.
7. ATTACHMENTS
1. Letter of Request
2. Area Map
3. Site Sketch
ITEM 1 3 02/13/2019