Item No. 3 - All-Way Stop ControlAGENDA ITEM
February 14, 2018
TO: Members of the
City Traffic Commission
THRU: Jacki Scott
City Traffic Engineer
ReviewedNerified B
City Traffic Engi eer
To Be Presented B
Dave AHenbach
FROM: Traffic Engineering Division
Public Works Department
1. SUBJECT
Request for the installation of an All -Way STOP control at the intersection of Trails End Lane
and East White Oak Ridge.
2. SUMMARY
The request is to provide additional traffic control at the subject intersection.
3. RECOMMENDED
Approve the request.
L. FISCAL IMPACT
Funds are available in the following account:
262.5032.56100.16302 Traffic Control Devices
5. STRATEGIC PLAN GOAL(S)
1.5 Provide and maintain infrastructure necessary to ensure the safety of the public.
6. GENERAL PLAN IMPLEMENTATION
Growth Management Goal 1.0 Reduce traffic congestion within the City.
Policy 1.10: Apply traffic calming measures, where appropriate, to residential neighborhoods
affected by cut - through traffic in accordance with the City's Residential Neighborhood Traffic
Management Program.
ITEM 3 February 14, 2018
1
7. DISCUSSION and BACKGROUND
Staff has received several complaints and inquiries from area residents within the past five years
about implementing an All -Way STOP control at the intersection of Trails End Lane and East
White Oak Ridge. Staff has studied the intersection annually since 2012. In November of 2016 a
"Cross Traffic Does Not Stop" sign was installed on trails End at East White Oak Ridge. In May
of 2017 a second stop sign was installed in the median on Trails End at the subject intersection as
well. The additional signing was added to increase visibility of the STOP control at the subject
intersection.
Following a number of complaints in 2017, staff conducted an updated study in December 2017
that indicates the intersection now meets the warrants for the installation of an All -Way STOP
control. Given the history of complaints from the area, staff in now presenting the study findings
to the Traffic Commission and notifying the surrounding neighborhood for discussion and action.
Existing Conditions
Both Trails End Lane and East White Oak Ridge are classified as Local Streets in the study area.
East White Oak Ridge runs in an east -west direction, while Trails End Lane runs in a north -south
direction. The entry/exit drive for Santiago Hills Park is located on the south side of the
intersection. East White Oak Ridge is residentially developed with a mixture of single - family
dwelling units and condominiums; however, they do not front out onto the street. Parking is
prohibited on both streets with the exception of the area adjacent to Santiago Hills Park. North -
south traffic approaching East White Oak Ridge is controlled by a 2 -Way STOP control for
Trails End Lane and Santiago Hills Park Exit Drive.
Accident History
The accident history at the subject intersection was reviewed for the past three -year period. Our
records indicate that there has been one reported accident at the subject intersection in that time.
On April 2, 2016, a broadside accident occurred at the subject intersection involving a
northbound vehicle colliding with a westbound vehicle.
Traffic Volume Characteristics
Turning movement counts were conducted at the subject intersection for both the AM and PM
peak traffic hours, and are shown in the table below:
Count Date
AM Peak Volume
Ratio
PM Peak Volume
Ratio
12/12/2017
397
2.97:1
370
1.64:1
Intersection Geometry
Both Trails End Lane and East White Oak Ridge intersect at right angles. Sight distance for all
approaches is good.
4
Analysis
There are three primary criteria examined when evaluating a local intersection for the possible
installation of a STOP control. The minimum criteria are:
1. Accident History
This criteria is satisfied if there are three or more reported accidents in a one -year period that
may be susceptible to correction by the installation of the STOP control device. There have
been no reported accidents at this location in the prescribed timeframe; however, a
correctable accident was noted in 2016.
Not Satisfied
2. Traffic Volume
The total vehicular volume entering the intersection from all approaches during a peak hour
equals 250 vehicles for both AM and PM peak hours during an average day with a ratio of
vehicles on the major and minor street approaches not to exceed 3:1. The subject intersection
meets the minimum entering traffic volume for both the AM and PM peak hours and ratio for
both peak hours as well.
Satisfied
3. Intersection Alignment and Design
A geometric problem in intersection design exists to the extent that a controlled flow of
vehicular traffic through the intersection is required and such control cannot be accomplished
by less restrictive means. Sight distance is adequate for all approaches to the subject
intersection.
Not Satisfied
4. Restricted Visibility
Satisfied when available visibility is less than 175 ft. of straight line of sight distance on the
higher volume street for pedestrians and vehicles crossing the intersection. The sight distance
pedestrian and vehicular cross traffic exceeds 175 ft.
Not Satisfied
5. Progressive Movement
On the more heavily traveled street the closest stop sign must be located at least 600 ft.
away, and 1,000 ft. away from a signalized intersection. The nearest traffic control is the
traffic signal at White Oak Ridge and Newport Boulevard. Over 1,500 ft. west of the
subject intersection.
Satisfied
3
Recommendation
Based on the above traffic analysis and staff observations, the subject intersection meets the
minimum entering traffic volume criteria for the placement of an All -Way STOP control. It is
therefore staff's recommendation that the Traffic Commission approve the installation of an All -
Way STOP control at the intersection of Trails End Lane and East White Oak Ridge.
The proponent and all residents and businesses within 300 feet of the study area were notified of
the Traffic Commission Meeting.
8. ATTACHMENTS
• Area Map
• Site Sketch
• Warrant Sheet
Dais: td
N:\Public Works \TRAFFIC\C T C\Reports\2018 Reports\2018- 2- 14\Item No. 3 - All -Way Stop\Item_3_All_Way_Stop.Doc
C!