DATE: November 29, 2018
TO: Board of Mayor and Aldermen
FROM: Eric Stuckey, City Administrator
Paul Holzen, City Engineer/Director of Engineering
Jonathan Marston, Assistant Director of Engineering
SUBJECT:
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Consideration of Amendment No. 1 to the Professional Services Agreement (COF Contract No. 2018-0062) with Alfred Benesch & Company for the Design of Intersection Improvements at the McEwen Drive Interchange with I-65 for Additional Engineering Services in an Amount Not-to-Exceed $35,015.20 (11/29/18 CIC 3-0)
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Purpose
The purpose of this memo is to provide information to the Franklin Board of Mayor and Aldermen (BOMA) concerning Amendment No. 1 to the Professional Services Agreement (PSA) (COF Contract No. 2018-0062 with Alfred Benesch & Company (Benesch).
Background
On May 8, 2018, the BOMA approved a PSA (COF Contract No. 2018-0062) with Benesch for the design of intersection improvements at the McEwen Drive interchange with I-65 in the amount of $28,365.60. The purpose of this design was to allow the opening of a second left-turn from westbound McEwen Drive to southbound I-65 in an effort to accommodate increasing traffic in the Cool Springs area.
The design team shared the preliminary design plans with TDOT staff to obtain their approval to proceed with the final design. During the initial review, TDOT staff asked for a queue and delay comparison prior to proceeding with approval of the preliminary design. Upon obtaining updated traffic count data, City staff performed the queue and delay analysis. This analysis revealed that the proposed design, shown with proposed yield control on the eastbound to southbound right-turn movement would create an unacceptable queue length during peak traffic that would back-up into the eastbound travel lane(s) of McEwen Drive. However, staff also determined that signalization of this right-turn movement would lead to an acceptable queue length. Signalization of this movement will requir...
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