The Farm-to-Market (FM) 546/County Road (CR) 400 project is an alignment study for a six-lane major thoroughfare from the intersection of Airport Drive and FM 546 in McKinney, Texas, to U.S. 380 at Boorman Lane in Princeton, Texas. The corridor was established in the 2014 Update of the Collin County Mobility Plan as part of improving future mobility across central Collin County. The study was divided into two parts because the work required in the segments is substantially different, with the eastern segment having much of the alignment already set. The eastern segment (Phase I) spans across City of Lowry Crossing and City Princeton city limits and ETJs, from Bridgefarmer Road to U.S. 380. FM 546/CR 400 Corridor Study – Phase I East has been conducted in collaboration with City of Lowry Crossing and City of Princeton. The preferred alignment for the eastern segment was approved at a regular session of the Collin County Commissioners Court on June 7, 2021 in McKinney, Texas. 

The western segment (FM 546 Extension Phase II) is located within the City of McKinney and City of Lowry Crossing city limits and ETJ. The western segment’s (Phase II) project limits are from Airport Drive to CR 393 and is a partnership between Collin County and the Texas Department of Transportation (TxDOT). For more information on the western segment, please visit   FM 546 Extension Phase II.

This website was created as means to keep interested parties aware of the progress of the project. To reach out to the team or receive project updates via email, click on “Learn More” tab.



Project Updates

Please click  here to view the latest design schematic, updated November 2022. 

• Right of Way document preparation and acquisition process is ongoing.
• Construction plans began Spring 2023.