HomeMy WebLinkAboutItem 3.e�1
Lr�kevtIle
Memorandum
To: Honorable Mayor and City Council
From: Monica Heil, Operations and Maintenance Engineer
Copy: Justin Miller, City Administrator
Chris Petree, Public Works Director
Zach Johnson, City Engineer
John Kornmann, Deputy Chief of Police
Troy Grossman, Streets Superintendent
Date: November 17, 2015
Subject: Updates to the City's Driver Feedback Sign Policy
City of Lakeville
Public Works
Attached for your consideration is a proposed update to the City's Driver Feedback Sign
Policy, to be re -named the Dynamic Speed Display Signs (DSDS) Policy.
The City Council adopted the original Driver Feedback Sign Policy in 2011 in response to
resident concerns regarding the speed of traffic along Flagstaff Avenue between CSAH 46
and Dodd Boulevard; prior to the installation of the City's first two fixed driver feedback signs
along Flagstaff Avenue in 2012. The original policy was intended to address the location of
permanent driver feedback signs only.
Since then, the City's Public Works Department has acquired two portable driver feedback
signs and the City's Police Department has continued to operate its mobile radar trailer unit.
The policy has been updated to include the information on the management of all DSDS units
currently operated within the City. As many significant language changes have been made to
the original Driver Feedback Sign policy, a redlined version of the updated policy is not
attached. Instead, a copy of the original Driver Feedback Sign Policy is attached for your
reference. Sections 1, 2 and 3 of the original policy have been modified, and the contents of
Section 4 from the original policy can now be found within Section 7 if the updated DSDS
Policy.
100 0 Fill 02 ! 101:1 WyApld \
Policy 5.03
1) PURPOSE
a) The City of Lakeville, Minnesota finds that it is in the best interest of the City to identify
guidelines for the consideration and installation of Dynamic Speed Display Signs (DSDS).
2) OBJECTIVE
a) DSDS is a recommended safety strategy to increase driver attention and speed awareness, and
to promote speed limit compliance. This policy identifies guidelines for the consideration and
installation of DSDS to avoid overuse, ensure consistency and maintain effectiveness.
3) GENERAL
a) DSDS is a device that detects and displays an approaching vehicle's current speed back to the
driver. If an approaching vehicle is exceeding the posted speed limit, the vehicle's speed will be
displayed and begin flashing. The display of the vehicle's current speed is intended to prompt
the driver to slow down.
b) Speed data from the DSDS is collected and reviewed by City staff to review concerns of
speeding, evaluate potential needs for additional enforcement or consider other measures for
controlling vehicle speed.
c) DSDS have been proven to have a speed -reducing effect in certain applications such as:
i) School zones
ii) Transition zones
iii) Work zones
iv) Other speed critical areas
d) The City's DSDS program includes both temporary and permanent signs.
4) TEMPORARY DSDS MANAGEMENT
a) The City's temporary DSDS equipment consists of the following:
i) Mobile Radar Trailer: The City's Police Department operates mobile radar trailer units to
display current vehicle speeds. This equipment is used to promote posted speed limit
compliance and is not used to collect or record traffic volume or vehicle speed. The unit
is placed along streets during daylight hours for a period of 1 — 2 days. Mobile radar
trailer units, including location, placement and hours of operation, are managed under the
supervision of the Police Chief or his/her designee.
ii) Portable Driver Feedback Signs: The City's Public Works Department operates Portable
Driver Feedback Signs to display current vehicle speed and collect vehicle speed data.
These signs are intended to be installed on a short-term, temporary basis to increase driver
attention and speed awareness, and to promote speed limit compliance in specific
applications such as maintenance or work zones. Speed data is collected and reviewed by
Public Works Department staff. Portable Driver Feedback Signs are managed under the
supervision of the Public Works Director or his/her designee.
5) GUIDELINES FOR PORTABLE DRIVER FEEDBACK SIGN INSTALLATION
a) The usage of Portable Driver Feedback Signs will be determined by the Public Works Director or
his/her designee.
b) Public Works Department staff will review requests for Portable Driver Feedback Signs and
provide a recommendation to the Public Works Director or his/her designee.
i) Portable Driver Feedback Sign locations shall have a minimum average annual daily traffic
volume of 500 vehicles per day (as determined by City staff) or roadway geometrics that
present additional challenges with speeding traffic.
c) Recommended Portable Driver Feedback locations will be placed on a Sign Installation Schedule
based on priority as determined by the Public Works Director or his/her designee to facilitate
service demand and establish priorities for deployment locations. New sign installation
locations may receive higher priority over previous installation sites (e.g., recurring requests for
the same location). Public Works Department staff will review the Sign Installation Schedule
on a quarterly basis.
d) The following guidelines will be used in determining the location, placement and hours of
operation of Portable Driver Feedback Signs:
i) Signs will be installed for a period of approximately 21 calendar days. Signs may be
removed early due to vandalism or technical difficulties.
ii) The City may accommodate up to six installation sites per year during the months of
May through October. The sequence of sign placement will be based on the Sign
Installation Schedule as described in Section C above.
iii) Specific sign locations will be determined by Public Works Department staff. Sign locations
may be affected by several factors including, but not limited to, sign visibility, underground
utilities, sight lines for radar tracking of vehicles, tree canopy impacting solar cells, street
geometrics and other factors.
iv) Signs shall be placed within public right-of-way, public easements or City -owned
property.
v) Sign posts shall be setback a minimum of 24 -inches from the face of curb or trail.
6) PERMANENT DSDS MANAGMENT
a) The City's permanent DSDS equipment consists of the following:
i) Fixed -Location Driver Feedback Signs: The City's Public Works Department operates
permanent Fixed -Location Driver Feedback Signs to display current vehicle speed and
collect vehicle speed data. These signs are intended to be permanently installed to increase
driver attention and speed awareness, to promote speed limit compliance and to assist in
addressing specific speeding concerns within the community. Speed data is collected and
reviewed by Public Works Department staff. Fixed -Location Driver Feedback Signs are
managed under the supervision of the Public Works Director or his/her designee.
7) GUIDELINES FOR PERMANENT DSDS INSTALLATION
a) The location of Fixed -Location Driver Feedback Signs will be determined by the City Council.
i) An engineering study may also be required prior to City Council approval.
b) The Public Works Director or his/her designee will review requests for Fixed -Location Driver
Feedback Signs and provide a recommendation to the City Council.
RE
gE
c) The following guidelines will be used in evaluating requests for Fixed -Location Driver Feedback
Signs:
i) Roadway Classification: Major Collector or Arterial
ii) Average Annual Daily Traffic (AADT): Greater than 5,000 vpd
iii) Average Speeds: Exceed Posted Speed Limit
iv) Driveway Access: Greater than 10 driveways per 1,500 feet.
v) Roadway History: Documented speed and safety problems
SPEED DATA MANAGEMENT
a) The Public Works Department is responsible for collection, management and storage of speed
data collected from the Portable and Fixed -Location Driver Feedback Signs.
LIMITATIONS
a) While the City fully intends to meet the guidelines established in this policy, there may be times
when this is not feasible. Issues including, but not limited to, budget constraints, critical
equipment failure, weather or other emergencies may prevent the City from meeting the
guidelines established herein. City staff must exercise both discretion and professional
judgment in determining the schedule and deployment of DSDS equipment.
Adopted in 2011
DRIVER FEEDBACK SIGNS
Policy 5.03
1) PURPOSE
a) The City of Lakeville, Minnesota finds that it is in the best interest of the City to outline the
policy and procedures for the consideration and installation of Driver Feedback (DFB) signs.
2) OBJECTIVE
a) In certain situations DFB signs can reduce speed and improve safety on some roadways. This
policy exists to outline the warrants necessary to consider the installation of DFB signs.
3) GENERAL
a) Driver feedback signs display real time speed measurements as the vehicle approaches the sign,
advising the driver of their speed. If the approaching car is exceeding the speed limit, and not in
compliance with the posted speed, they are warned by a flashing display of LED lights. The
display prompts the driver to slow down, creating a safer environment for pedestrians, school
children, cyclists, roadway workers, and the general public.
b) Traffic -calming, through the installation of DFB signs, has been proven effective in:
i) School zones
ii) Transition zones
iii) Work zones
iv) Other speed critical areas
c) The installation of DFB signs must be approved by the City Council.
4) WARRANT REQUIREMENTS
a) While DFB signs have proven to be effective in most instances, it is important that locations be
evaluated against these warrants to ensure that the devices do not lose their impact and that
they are used in locations where they are cost beneficial. Therefore the following warrants
must be met before consideration will be given for the installation of DFB signs. An engineering
study may also be required prior to City Council approval.
i) Roadway Classification: Major Collector
ii) Average Daily Traffic (ADT): Greater than 5,000
iii) Average Speeds: Exceed Posted Speed Limit
iv) Driveway Access: Greater than 10 Driveways per 1500 feet.
v) Roadway History: Documented Speed and Safety Problems
121