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I-640 Interchange at North Broadway - Knoxville

Proposed Improvements

The proposed concept mitigates the most critical safety and congestion concern, namely the southbound weave on Broadway that occurs between Tazewell Pike and Broadway traffic. This alternative calls for two (2) lane westbound on ramp from Broadway to I-640 with the right lane formed from the Tazewell Pike cramp and the left lane formed at Broadway. Therefore, the weave is eliminated because southbound Tazewell Pike and southbound have separate lanes. To make this configuration as effective as possible, the I-640 on ramp will be extended onto Broadway to allow motorists ample time to merge onto I-640.

The second feature is northbound Broadway to westbound I-640 loop ramp. This configuration calls for the westbound off ramp from I-640 to be positioned under the proposed loop ramp. By positioning the westbound off ramp under the proposed loop ramp, instead of outside thee loop ramp, 35 to 40 miles per hour (MPH) design speed can be achieved.

This alternative is the preferred concept because it mitigates the most critical safety and congestion issue and does so in a cost effective manner. Significant advantages include:

  • Minimizes acquisition of ROW and the taking of businesses
  • Does not encroach on the blue line stream running along Dutch Valley Drive
  • Does not place undue traffic burden on Old Broadway, which is ill-equipped to accommodate additional traffic


New entrance ramp from NB Broadway to I-640 WB and Redesigned I-640 WB Exit Ramp


Design Features

  • New loop entrance provides NB Broadway access to I-640 WB, eliminating the existing left turn lane access.
  • Exit ramp from I-640 WB will be relocated and bridge over new loop ramp.

A third feature occurs where Old Broadway ties into Tazewell Pike in the northwest quadrant of the interchange. This configuration calls for the realignment of Old Broadway tying into Tazewell Pike.
This alternative is the preferred concept because it mitigates the most critical safety and congestion issue and does so in a cost effective manner. Significant advantages include:

  • Modifies the current intersection of Old Broadway, Greenway Drive, and Walker Boulevard
  • Old Broadway will line up directly across from the proposed I-640 westbound ramp to allow a more desirable sight distance for the motorists
  • A traffic signal will be placed at this location to primarily to facilitate the safe movement of motorists to avoid collisions and for safe pedestrian/bike movement
  • A traffic signal will not place a traffic burden on Old Broadway, which is ill-equipped to accommodate additional traffic


Redesigned ramp from Tazewell Pike and Broadway to I-640 WB


Design Features

  • SB Broadway widened to add new ramp lane to I-640 WB.
  • Ramp from Broadway and Tazewell Pike will be separated from SB Broadway by barrier wall, eliminating the existing weave.
  • Redesigned entrance ramp from Broadway SB and Tazewell Pike will be two lanes.

 


Broadway (S.R. 33) Southbound Typical Section

 


Tazewell Pike and Old Broadway access to I-640 EB and SB Broadway

Bicycle and Pedestrian Facilities
The department began engaging with our local partners in early 2012 to discuss various possibilities to incorporate multimodal transportation options. The City of Knoxville and the Knoxville Regional Transportation Planning Organization (TPO) requested the Tennessee Department of Transportation (TDOT) to consider adding bicycle and pedestrian facilities along Old Broadway as an alternate route to the interchange modification project. The department has given full consideration to honoring this request and has proposed an option which the City of Knoxville and the TPO have agreed upon. The department recognizes the benefits in providing local transportation connections that consider the safety of all users.

Click on image for larger view (pdf)

For further information pertaining to TDOT’s Bicycle and Pedestrian Program, please visit our website at http://www.tdot.state.tn.us/bikeped/ or please contact Jessica Wilson, Bicycle and Pedestrian Coordinator at (615) 741-5025 or Jessica.L.Wilson@tn.gov.