TENNESSEE DEPT OF TRANSPORTION I-40/I-240 INTERCHANGE IMPROVEMENTS - - PowerPoint PPT Presentation

TENNESSEE DEPT OF TRANSPORTION I-40/I-240 INTERCHANGE IMPROVEMENTS

• Project History

Began Phase II plans - August 2006. Traffic Analysis for Weaving - December 2006. Traffic Queue analysis at Covington Pike - May 2007 Revised plans - June 2007 Update technical data for I.M.S. - 2008 Project limits extended - October 2011 Complete ROW plans - October 2012 Construction Plans - Underway

I-40/I-240 INTERCHANGE

Phase I of project. Added flyover WB I-40 (east) to

WB I-240. Added portion of ramp from WB I-40 to WB I- 40 (north)

Phase II-A - Complete ramp structure from WB I-40 (east) to WB I-40 (north). Add ramp from EB I-40 (north) to EB I-40 (east).

Phase II-A - Complete ramp structure from WB I-40 (east) to WB I-40 (north). Add ramp from EB I-40 (north) to EB I-40 (east).

Phase II-B (Now Phase III)

– Reconstruct interchange to add through lanes from I-40 (north) to I-240.

Phase II-B (Now Phase III)

– Repurpose existing roadways to serve as Collector- Distributor (CD) roads for ramps

Level of Service Traffic Analysis

– AM and PM peaks – I-40 east & north – I-240 – Covington Pike – Sam Cooper – All associated ramps

Findings for New “Phase II” and “Phase III” Freeway Sections

– I-240 WB & EB unsatisfactory (LOS E or F) by 2016 – I-40 WB (east) unsatisfactory by 2015 – Weaving sections okay but marginal – Ramp Junctions have merge/diverge problems in near future

Current Design Phase II

I-240 Addition of one (1) auxiliary lane on both east and west sides

Widen existing bridge over Greenway

Relocate Ramp from EB I-240 to EB I-40 and widen to three (3) lanes

Widen Ramps from EB I-40 (east) prior to split to four (4) lanes.

I-40 (North) - Widen existing WB I-40 bridge over Summer Avenue

Ramp to be improved and remain open for local access from WB I-40 (east) to Summer Avenue

Ramp from Summer Ave to be relocated east to allow for construction of other ramps

Ramp from WB I-40 (north) to be relocated east to allow for construction of auxiliary lanes

Construct Ramp from EB I-40 (north) to EB I-40 (east) and relocate entrance

Complete Ramp from WB I-40 (east) to WB I-40 (north)

Frontage Road relocated east and access to Summer Avenue relocated east

Sam Cooper Boulevard – Addition of one (1) lane in both the EB and WB directions. Requires a design exception be requested due to substandard shoulder widths.

I-40 (East) - Addition of auxiliary lane EB I-40 from Relocated Ramp to existing lane addition near Sycamore View Road

I-40 (East) -Addition of two (2) auxiliary lane WB

I-40 (East) -Replace Wolf River Bridge.

I-40 (North) - Add two (2) auxiliary lanes from up to Covington Pike Interchange.

I-40 (North) - Replace Covington Pike Bridge to accommodate auxiliary lanes

I-40 (North) - Continue an additional auxiliary lane WB from Covington Pike

Covington Pike Interchange - Widen Covington Pike to allow for dual left turn onto EB I-40 entrance Ramp

Covington Pike Interchange - Widen EB I-40 entrance Ramp to allow for a dual-left turn lane.

I-40/I-240 INTERCHANGE

Covington Pike Interchange - Widen and shift exit ramp EB I-40 to Covington Pike to provide additional queue storage space off I-40.

I-40/I-240 INTERCHANGE

Covington Pike Interchange - Widen Ramp from WB I-40 (north) to Covington Pike. Add exclusive right-turn lane and additional queue storage

I-40/I-240 INTERCHANGE

• Original Project Limits

I-40/I-240 INTERCHANGE

I-40/I-240 INTERCHANGE

Current Design

• QUESTIONS

I-40/I-240 INTERCHANGE