HomeMy WebLinkAboutItem #07 Approval of Traffic Calming Speed Tables for Ridgefield Ave. and Wanda St.
AGENDA ITEM COVER SHEET
Meeting Date: November 20, 2007
Item # 1
Contact Name:
Contact Number:
Stephen C. Krug
6002
Reviewed By:
Department Director:
City Manager:
Subject: Traffic Calming Speed Tables, Ridgefield Avenue & Wanda Stre t.
Background Summary:
The Commission approved the installation of traffic calming devices on Kimball Dr. & Marlene Dr. at the
November 6, 2007 Commission Meeting. At that time, the traffic calming petition for Ridgefield Ave.,
including Wanda St., had not secured the required number of property owner approvals. The required
approvals have now been received by Public Works and we are requesting the Commission approve the
installation of traffic calming on these two streets. Due to the horizontal geometry of Ridgefield Ave.,
Wanda St. requires a speed table also in order to reduce the Center St. cut-through traffic.
Public Works recommends utilizing the same prefabricated traffic calming devices approved at the
previous Commission meeting manufactured by Traffic Logix.
· Ridgefield Ave. - use three (3) 14' x 3" x 21' speed tables spaced to provide optimum calming.
· Wanda St. - use one (1) 14' x 3" x 21' speed table.
The Cost of the tables is as follows:
· $17,376.00 for four (4) 14' x 3" x 21' speed tables @ $4,344.00 each.
Issue:
Should the City Commission approve the proposed traffic calming installations?
Recommendations:
Staff requests approval by the City Commission to forgo the normal bid process and proceed with the
proposed traffic calming installations for a not to exceed cost of $18,000.00.
Attachments:
Manufacturer's specification sheet.
Financial Impact:
$3,408.00 remains in the carry forward 2006-07 traffic calming budget in account line 001-541-10-6302.
$4,000.00 was designated by the Commission at the October 16, 2007 meeting, Regular Agenda Item
#7, from Code Enforcement Board Case No. 06-078, and collected by the City on October 25, 2007 in
the Violation of Ordinance account line 001-35-4100. The remaining $9,968.00 is available in the 2007-
08 traffic calming budget account line 001-541-6302.
Type of Item: (please mark with an "x')
Public Hearing
Ordinance First Reading
Ordinance Second Reading
Resolution
X Commission Approval
Discussion & Direction
For Clerk's Deat Use:
_ Consent Agenda
Public Hearing
_ Regular Agenda
Original Document/Contract Attached for Execution by City Clerk
Original Document/Contract Held by Department for Execution
Reviewed by City Attorney
Reviewed by Finance Dept.
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The Traffic Logix's Speed Hump and Speed Table Specifications
1. General description:
Speed Humps and Speed Tables of various dimensions are
constructed using interlocking modules (US patent pending
12633-23USPR). The standard foot print dimensions of each
module are 18" by 42". The weight of the various modules is
between 50 and 100 Ibs.
Each unit is bolted to a paved road surface using six lag bolts
3/8" dia. through a plastic shield installed in the road surface.
The Traffic Logix proprietary two directional tongue and grove
interlocking system provides additional connection between the
modules and increases stability of the speed hump or speed
table.
2. Dimensions of the modules:
width 18" (+/- 1/16")
length 42" (+/- 1/8")
thickness 3" (+/- 1/8")
3. Dimensions of the Speed Humps/Tables:
(width and length of speed hump are adjustable)
width from 7' up, by 3.5' increments
length: according to a street width, from 6' by 1,5' increments
height: 3" or 4"
4. Standard dimensions of the Speed Humps/Tables:
width 7', 14', 21'
length: according to a street width
height: 3" or 4"
5. Entrance and exit gradient:
1 :15
6. Side gradient:
1:3
7. Material:
Compression molded 100% recycled synthetic and natural
rubber composite
8. Physical properties:
tensile strength: minimum 500 psi
shore hardness: minimum lOA
specific gravity 1.1
9. Marking:
rubber modules are available in black or
black with yellow reflective tape or
black with white reflective tape
10. Installation method:
each module is affixed to the pavement with six zinc plated
steel lag bolts 3/8" x 4", plastic polypropylene shields and
3/8" zinc plated steel washers supplied with the modules
9/16" diameter holes are drilled through the holes in the
modules into a paved road.
the plastic shields are installed in the mounting holes with
the provided installation tool
the lag bolts are inserted into mounting holes and tightened
(do not over tighten the bolts)
11. Installation tools:
chalk line, measuring tape, heavy duty hummer drill, 9/16"
dia. by 10" long carbide tip drill bits, installation tool for
plastic shields, 11/16" drive socket with a power tool,
portable blower, utility knife, crow bars
installation tool for the plastic shields is supplied for the initial
installation job only
additional bolts, shields, washers, and installation tools can
be purchased from Traffic Logix
12. Warranty:
A two (2) year warranty is provided on all Speed HumpfTable
components installed as per the manufacturer's installation
instructions.
14' X 3" X 22.5' Speed Hump
Traffic Logix 2005
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