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.
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.
View a collection of videos from ADOT showing various route simulations of proposed overpass.
News & Updates
The Arizona Department of Transportation is advising drivers to slow down and use caution through the areas surrounding the intersection of State Route 347 and the Maricopa-Casa Grande Highway as construction continues.
The Arizona Department of Transportation advises drivers who use Maricopa-Casa Grande Highway (MCGH) to plan for overnight road closures for five days beginning June 4 at 9:00 PM as work continues on the State Route 347 overpass project in Maricopa.
Southbound SR 347 will be restricted to one lane between Hathaway and Garvey Avenues on Saturday, May 18, as well as Monday and Tuesday May 20 and 21, from 5:30 AM - 3:30 PM for crews to continue work on the overpass alignment.
Mayor Christian Price was joined by former Mayor Kelly Anderson to provide an update on the SR 347 Overpass Project from on top of the structure!
The Arizona Department of Transportation will be carrying out overnight closures of three intersections in Maricopa this week.
ADOT traffic control has closed Alterra Road and Desert Cedars Drive in both directions at the intersection of SR 347 for work on the Overpass Project.
The 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.
The first of two scheduled concrete pours for the SR 347 Overpass deck has been rescheduled to take place on Thursday, April 25th between 1-5 a.m.
Another project milestone will soon be achieved when the concrete deck is poured for the new bridge that will span over the Maricopa-Casa Grande Highway (MCGH). The deck pour is scheduled to take place overnight on April 24 and 30.