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Modernization of I-75 through Downtown Dayton

 Current Project Updates



All traffic is running on the new southbound structures between Main Street and US 35.  Access to downtown Dayton is still provided at US 35 and Main Street. Traffic will be in this configuration throughout construction of the new northbound lanes. There is a long term left lane closure on the ramp from State Route 4 southbound to I-75 southbound.


The Project is 88% Complete.

For more information scroll down and click on the April 2016 project newsletter.




Reconstruct I-75 between Fifth St. and Riverview Ave.

Replace the various left-sided and right-side ramps with a single, centrally-located interchange for downtown Dayton. The interchange will service movements to and from the following streets:

  • First Street
  • Third Street
  • Salem Avenue
  • Second Street
  • Monument Avenue

 Construction Information



This project began October 8, 2012.

The ramps from I-75 Northbound to First Street and Third Street closed October 15, 2012. These ramps will remain closed.

Expect the First Street and Third Street ramps on the southbound side of the interstate to close in mid November or early December. Please see the detour map below for alternate routes. ​

This is major construction. Motorists are advised to use caution and reduce speed through the work zone.

Arrow boards and signs will be in place prior to the work zone to alert motorists of the upcoming lane closures. Law enforcement will be on site to monitor traffic flow.


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 Project Logistics



  • Sale Date: August 2012
  • Start Date: October 8, 2012
  • Estimated Completion Date: September 2017


  • Construction Cost: $126 million
  • Estimated Overall Cost: $154 million

Project Location

  • I-75 Between Fifth St. and Riverview Ave.

 Project Benefits

  • 3 Continuous Through Lanes on I-75
  • Improved Safety
  • Replace Aging Pavements and Bridges
  • Better Traffic Flow
  • Fewer Incidents and Related Congestion​



Visit OHGO, Your source for Real Time Traffic Updates: for information on lane and road closures caused by construction, incidents, weather or other related traffic events, visit ODOT's gateway to traffic and roadway information.

 Sign Up for News Releases

To receive monthly newsletter updates for the I-75 Construction via email, Please click the link below.


Phase 2 Detour Map.pdf
9/28/2012 1:20 PM593 KB
I-75 Phase 2 Fact Sheet.docx
9/25/2012 10:43 AM3731 KB
Stay Connected.docx
10/17/2012 3:38 PM156 KB
4/16/2014 2:57 PM26646 KB

 Trail Detours

MOT-75-P2 Trail Detours.pdf
7/25/2012 10:29 AM2179 KB
Detour Description.pdf
7/25/2012 10:29 AM113 KB


11/5/2012 3:58 PM399 KB
December 2012 Newsletter.pdf
12/7/2012 9:40 AM290 KB
January 2013 Newsletter.pdf
1/3/2013 11:40 AM304 KB
February 2013 Newsletter (2).pdf
2/4/2013 12:24 PM335 KB
March 2013 Newsletter.pdf
3/1/2013 1:27 PM341 KB
April 2013 Newsletter.pdf
4/3/2013 3:56 PM339 KB
May 2013 Newsletter.pdf
5/6/2013 12:01 PM348 KB
June 2013 Newsletter.pdf
6/4/2013 1:19 PM364 KB
July 2013 Newsletter.pdf
7/15/2013 9:05 AM356 KB
August 2013 Newsletter.pdf
8/12/2013 9:23 AM358 KB
Sept 2013 Newsletter.pdf
9/9/2013 9:59 AM356 KB
October 2013 Newsletter.pdf
10/8/2013 3:27 PM377 KB
November 2013 Newsletter.pdf
11/8/2013 11:16 AM351 KB
December 2013 Newsletter.pdf
12/3/2013 9:02 AM307 KB
January 2014 Newsletter.pdf
1/7/2014 11:24 AM354 KB
February 2014 Newsletter.pdf
2/10/2014 10:23 AM339 KB
March 2014 Newsletter.pdf
3/3/2014 2:04 PM319 KB
April 2014 Newsletter.pdf
3/31/2014 11:42 AM329 KB
May 2014 Newsletter.pdf
5/7/2014 2:29 PM338 KB
June 2014 Newsletter.pdf
6/9/2014 11:40 AM310 KB
July 2014 Newsletter.pdf
7/2/2014 7:53 AM428 KB
August 2014 Newsletter.pdf
8/5/2014 9:27 AM334 KB
September 2014 Newsletter.pdf
9/5/2014 9:28 AM333 KB
October 2014 Newsletter.pdf
10/8/2014 12:20 PM315 KB
November 2014 Newsletter.pdf
11/14/2014 9:20 AM347 KB
December 2014 Newsletter.pdf
12/3/2014 11:56 AM386 KB
January 2015 Newsletter.pdf
1/12/2015 10:08 AM327 KB
February 2015 Newsletter.pdf
2/13/2015 3:12 PM390 KB
March 2015 Newsletter.pdf
3/18/2015 2:08 PM330 KB
April 2015 Newsletter.pdf
4/1/2015 1:22 PM366 KB
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​Any questions or concerns regarding this page or project
please contact the Public Information Officer
(937) 497-6820