• SR 347 Overpass by Victor Moreno

Overpass Tracker

Press Enter to show all options, press Tab go to next option

With ADOT's State Route 347 at Union Pacific Railroad project well underway, this page will provide local news and information related to the project to help keep residents informed. If you have any questions or concerns about the project, please call our Overpass Tracker Hotline at 520-316-6910.

Project Overview

SR 347 is Maricopa's main transportation corridor through the community, serving as a regional connector to major employment and recreation areas. Traffic averages over 31,000 vehicles per day and future (2040) projections show over 60,000 vehicles per day. Just south of the Maricopa-Casa Grande Highway, SR 347 crosses the existing UPRR where there are currently 40 to 60 trains per day; the UPRR has plans to expand service, which would increase train traffic upwards of 100 trains per day. Additionally, the Amtrak station is located just east of the intersection and vehicular traffic is routinely delayed for its passenger operations.

ADOT, in conjunction with FHWA and the City of Maricopa, completed a study to evaluate alternatives and identify improvements to access, capacity and traffic operations through 2040. The study evaluated a future grade separation (bridge) to replace the existing at-grade intersection of SR 347 at the Union Pacific Railroad (UPRR) track.

For full details, including public meeting schedules, documents, and maps, please visit ADOT's State Route 347 at Union Pacific Railroad project page.

ADOT's State Route 347 Featured Videos thumbnailFeatured Videos

View a collection of videos from ADOT showing various route simulations of proposed overpass.

Project Map

News & Updates

MCGH to Close for 2nd Overpass Deck Pour

Post Date:04/25/2019

MCGH to Close for 2nd Overpass Deck PourThe Maricopa-Casa Grande Highway will be closed overnight from 10:00 PM on Tuesday, April 30 until 5:00 AM on Wednesday, May 1 for the second half of the overpass deck pour.

Detour information:

  • MCGH-to-SR 347 Detour
    • Travel north on Maricopa Groves Parkway/Donithan Way, and then turn west on Butterfield Parkway. Proceed west on Edison Road to SR 347.
    • Bus and truck traffic: Travel north on White and Parker Road, and then turn west on Smith Enke Road to SR 347.
  • SR 347-to-MCGH Detour
    • Travel east on Edison Road, and then turn south on Butterfield Parkway Proceed south on Donithan Way/Maricopa Groves Parkway to MCGH.
    • Bus and truck traffic: Travel east on Smith Enke Road, and then turn south on White and Parker Road.

Schedules are subject to change based on weather and other unforeseen factors.

Head to for an overview of the project, frequent updates on traffic impacts, project timelines, maps and videos of what the project will look like when complete. The City of Maricopa has also established a 24/7 Hotline for you to call and get answers to more specific questions or concerns at (520) 316-6910.

Return to full list >>