LTC 115-2011 Modifications to the Intersection of Alton Road &16t St OFFICE OF THE CITY MANAGER
NO. LTC # j115 -20� LETTER. TO COMMISSION
TO: Mayor Matti Herrera Bower and Members of the City Commission
FROM: Jorge. City Manager
DATE: May 13, 20.11
SUBJECT: Modifications to the Intersection of Alton Road and 16t Street .
The purpose of this - Letter to the Commission (LTC) is to provide you. with updated information
.. on the - installation of a westbound lef .turn bay for the intersection of Alton :Rockand 1.6 Street.
This project was` .develo,ped to take care of significant westbound traffic back -ups during
afternoon peak ' hours. The intersection! modification will be made during the month of June
2011.
There is no dedicated left turn -lane on 16 Street at its intersection with Alton Road (Attachment
A).- The PM peak, which is between 4:00 PM and 6 :00 PM is the worst peak. period for this
area. During this interval of time, the left turns were counted and - averaged 212 vehicles per
hour, while the through movements averaged 97 vehicles per hour and right turn .movements
averaged 73 vehicles per hour. Without a ,dedicated left turn lane, westbound traffic backs up
during afternoon peaks. These,backups often reach the intersection with Lenox Avenue.
'On .December. 10, 2008, the .Neighborhoods /Community Affairs'. Committee approved a
conceptual ;plan .for the removal of .five. (5) parking spaces in order to accommodate the
reconfiguration of the intersection:
The Public Works Department developed plans for a left turn and - submitted to. the Miami Dade
Count Traffic Engineering Division MDCTED Miami Dade Count Traffic Signs - and Si
Y 9 9 ( )� Y nals
9
Division (MDCTSS), and Florida Department of Transportation (FDOT) for approval. Numerous
meetings were required with these agencies to negotiate'a reduction in the loss of parking that
they would require and to- 'discuss their sometimes conflicting requirements. MDCTED issued a
permit on December - 9; 2010, . MDCTSS approved the plan on December 8, 2010, . and FDOT
iss ued , '.a permit on February 4, 2011 which was renewed May 9, 2011.-
16 Street has a'70-foot right -of -way with 10 -foot . sidewalks including .curbs, 8.5 -foot parallel
parking lanes; 5 5 =foot bike lanes,.' and 11 -foot travel lanes: The addition of a left turn lane
requires the removal of five parking spaces on the south .side of 16 Street and the narrowing of
the travel lanes to 10 feet (Attachment B). The loss of parking was deemed more feasible than
reducing sidewalk width which would have required relocating light poles and drainage.
The '16 "'Street approaches will,be partially milled and resurfaced in order to remove the existing.
pavement . markings_ and harmonize the travel lanes: through the intersection. There will be no
impact on the traffic signal.
This project will follow the following schedule:
• Construction start: May 31, 2011 ;
• Construction end': June 30, 2011
Intersection of Alton Road and 16' Street
May 13, 2011
Page 2 ,of 2
Please let me know if you have any questions or require additional information.
Attachments:
A. Existing Conditions Plan
B. Proposed Pavement Marking and Signage Plan
K Br /HDC /RWS
F: \work \$ALL \(1) EMPLOYEE FOLDERS \Josiel Ferrer \rnemo.16th: and Alton \LTC 16 and Alton.docx
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